question stringlengths 19 1.79k | answer listlengths 1 1 | qid stringlengths 11 36 | image listlengths 1 32 | is_video bool 2
classes | __index_level_0__ int64 0 10.7k |
|---|---|---|---|---|---|
The pedigree shown in Figure 1, numbered by individual, tracks the instances of color blindness within the family. Squares are male, circles are female, and each half of a shape represents one of the two copies of the gene. Shading represents that the allele for color blindness is present.
Of the individuals with a "?"... | [
"\\boxed{11}"
] | d500c4f5-a64c-48d9-870b-740e77e1c95b | [
"images/d500c4f5-a64c-48d9-870b-740e77e1c95b-0.jpg"
] | null | 837 |
The following figure shows the transfer of energy through a forest community. According to the information in the figure, what is the proportion of energy entering the first trophic level that is passed to the second trophic level? Express your answer as a value between 0 and 1, rounded to the nearest hundredth. (Fina... | [
"\\boxed{0.12}"
] | 2c415b42-b956-40e4-ac61-d738371dd918 | [
"images/2c415b42-b956-40e4-ac61-d738371dd918-0.jpg"
] | null | 838 |
Oxygen is transported throughout the body by hemoglobin molecules within red blood cells. The blood types A, B, and O identify red blood cells distinguished by specific sugars attached to membrane-bound proteins. There are three alleles (A, B, and O), two of which (A and B) code for enzymes that attach a specific sugar... | [
"\\boxed{A }"
] | 81c71001-5cbc-4e04-9214-57b491fb0129 | [
"images/81c71001-5cbc-4e04-9214-57b491fb0129-0.jpg"
] | null | 839 |
Questions refer to the graph below that plots the temperature of water as a function of heat energy absorbed.
1. What state of matter does the line labeled X represent? (Answer is a single word.) | [
"\\boxed{liquid}"
] | cb6a3957-ca34-4d92-9ecf-109f086107a1 | [
"images/cb6a3957-ca34-4d92-9ecf-109f086107a1-0.jpg"
] | null | 840 |
Questions refer to the graph below that plots the temperature of water as a function of heat energy absorbed.
What part of the graph represents the cooling effect of sweating? (Answer is a single letter.) | [
"\\boxed{Y}"
] | 61e58a1e-8687-4f7d-b237-6f1b58f7ef69 | [
"images/61e58a1e-8687-4f7d-b237-6f1b58f7ef69-0.jpg"
] | null | 841 |
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in t... | [
"\\boxed{S}"
] | 1f5935d6-3314-4c7b-b4a2-bc77ffa23088 | [
"images/1f5935d6-3314-4c7b-b4a2-bc77ffa23088-0.jpg"
] | null | 842 |
Shown in the diagram is a graph of $f'$, the derivative of function $f$. If $f(3) = 3$, then $f(1)=$?
A. \frac{10}{3}
B. \frac{13}{3}
C. -\frac{5}{3}
D. 4
E. 6 | [
"\\boxed{B}"
] | c5cb69c0-faaa-446d-a0b1-2db42cec854d | [
"images/c5cb69c0-faaa-446d-a0b1-2db42cec854d-0.png"
] | null | 843 |
A graph of function $f(x)$ on the interval $[-1, 4]$ is shown. Regions A, B, and C have areas of 1, 2, and 3 respectively. What is $\int_{-1}^{4} (f(x) + 2) dx$?
A. 2
B. 4
C. 10
D. 12
E. 16 | [
"\\boxed{D}"
] | ed1caf7a-3a78-468b-ad1d-1ef6a3c21fd3 | [
"images/ed1caf7a-3a78-468b-ad1d-1ef6a3c21fd3-0.png"
] | null | 844 |
Shown above is a slope field for which of the following differential equations?
A. $\frac{dy}{dx} = \frac{x}{y}$
B. $\frac{dy}{dx} = xy$
C. $\frac{dy}{dx} = x + y$
D. $\frac{dy}{dx} = x - y$ | [
"\\boxed{C}"
] | 353db57b-ef28-4bb4-800e-0c1dbe0459bb | [
"images/353db57b-ef28-4bb4-800e-0c1dbe0459bb-0.png"
] | null | 845 |
In northwest Pennsylvania, a zoologist recorded the ages, in months, of 55 bears and whether each bear was male or female. The data are shown in the back-to-back stemplot below. Based on the stemplot, which of the following statements is true?
(A) The median age and the range of ages are both greater for female bear... | [
"\\boxed{A}"
] | 62a13c4b-43c4-42f1-98c6-2247ed638160 | [
"images/62a13c4b-43c4-42f1-98c6-2247ed638160-0.png"
] | null | 846 |
A state educational agency was concerned that the salaries of public school teachers in one region of the state, region A, were higher than the salaries in another region of the state, region B. The agency took two independent random samples of salaries of public school teachers, one from region A and one from region B... | [
"\\boxed{C}"
] | 9fc91287-ec38-4773-a6dd-3714cdab40ea | [
"images/9fc91287-ec38-4773-a6dd-3714cdab40ea-0.png"
] | null | 847 |
The number of siblings was recorded for each student of a group of 80 students. Some summary statistics and a histogram displaying the results are shown below. An outlier is often defined as a number that is more than 1.5 times the interquartile range below the first quartile or above the third quartile. Using the defi... | [
"\\boxed{E}"
] | 05b131e8-2a8c-4405-8f53-5a2a0d62f0ab | [
"images/05b131e8-2a8c-4405-8f53-5a2a0d62f0ab-0.png"
] | null | 848 |
The following cumulative graph gives the electricity demand of a certain town.The power plant that provides electricity to this town is capable of generating 12,000 kW daily. On what percent of days will the power plant not be able to meet the demand for electricity?
A. About 3 percent
B. About 60 percent
C. About 80 ... | [
"\\boxed{A}"
] | e40da5fc-643b-4723-bf20-edbb9d1c791a | [
"images/e40da5fc-643b-4723-bf20-edbb9d1c791a-0.jpg"
] | null | 849 |
Sixty pairs of measurements were taken at random to estimate the relation between variables X and Y. A least squares regression line was fitted to the collected data. The resulting residual plot is as follows. Which of the following conclusions is appropriate?
A. A line is an appropriate model to describe the relation... | [
"\\boxed{B}"
] | 63817938-ba51-4663-8731-c611658a7c09 | [
"images/63817938-ba51-4663-8731-c611658a7c09-0.jpg"
] | null | 850 |
For the histogram pictured above, what is the class interval (boundaries) for the class that contains the median of the data?
A. (5, 7)
B. (9, 11)
C. (11, 13)
D. (15, 17)
E. (7, 9) | [
"\\boxed{E}"
] | 8f34fd56-30f4-45dd-a2b0-96be2c441afc | [
"images/8f34fd56-30f4-45dd-a2b0-96be2c441afc-0.jpg"
] | null | 851 |
Thirteen large animals were measured to help determine the relationship between their length and their weight. The natural logarithm of the weight of each animal was taken and a least-squares regression equation for predicting weight from length was determined. The computer output from the analysis is given below. Give... | [
"\\boxed{C}"
] | 37ab935f-4563-49a2-8675-17b27db4942a | [
"images/37ab935f-4563-49a2-8675-17b27db4942a-0.jpg"
] | null | 852 |
The following is a probability histogram for a discrete random variable X. What is $\mu_x$.
A. 3.5
B. 4.0
C. 3.7
D. 3.3
E. 3.0 | [
"\\boxed{D}"
] | 16dd6ab1-0700-4cb2-9886-e8f836a218ad | [
"images/16dd6ab1-0700-4cb2-9886-e8f836a218ad-0.jpg"
] | null | 853 |
Breakfast cereals have a wide range of sugar content. Some cereals contain High Fructose Corn Syrup (HFCS) as a source of sugar and some do not. The boxplots above show the total sugar content of different types of cereal for those containing HFCS and for those that do not. Which statement is true based on the boxplots... | [
"\\boxed{E}"
] | fe186ed5-48a3-4baf-9a7a-632aef1560cf | [
"images/fe186ed5-48a3-4baf-9a7a-632aef1560cf-0.jpg"
] | null | 854 |
Researchers were gathering data on alligators in an attempt to estimate an alligator's weight from its length. They captured 29 alligators and measured their length and weight. They created three regression models. Each model, along with its residual plot, is shown below. yrepresents the weight in pounds and xrepresent... | [
"\\boxed{D}"
] | f2325596-9835-4c4c-81b6-7fc9dcbd6225 | [
"images/f2325596-9835-4c4c-81b6-7fc9dcbd6225-0.jpg"
] | null | 855 |
The graph of f(x) is given above. Which of the following statements is true about f"(x) ?
A. f"(x) > 0 for all values of x
B. f"(x) < 0 for all values of x
C. f"(x) < 0 for -2 < x < -1 and f"(x) > 0 for -1 < x < 1 and x > 2
D. f"(x) > 0 for -2 < x < 0 and x > 2, and f"(x) < 0 for 0 < x < 2 | [
"\\boxed{D}"
] | 165eae60-e97d-4771-8cfa-4c93637a64ac | [
"images/165eae60-e97d-4771-8cfa-4c93637a64ac-0.png"
] | null | 856 |
The position of a particle, s, is given above for 0 ⤠t ⤠10. On what interval(s) is the particle slowing down?
A. 2 ⤠t ⤠6
B. 0 ⤠t ⤠4
C. 0 ⤠t ⤠2 UU 4 ⤠t ⤠6
D. 2 ⤠t ⤠6 U 6 ⤠t ⤠10 | [
"\\boxed{C}"
] | bdee39e9-d1f7-47c1-9d44-c145077b1b3f | [
"images/bdee39e9-d1f7-47c1-9d44-c145077b1b3f-0.png"
] | null | 857 |
Question: 26
Data values represented by the bar labeled "10" in the histogram below fall into which range?
A. 7.5 up to 12.5
B. 7.25 up to 12.75
C. 8.5 up to 11.5
D. 8.75 up to 11.75
E. 8.75 up to 11.25 | [
"\\boxed{E}"
] | 7e5364b5-308c-47f3-945a-af50fc76cdba | [
"images/7e5364b5-308c-47f3-945a-af50fc76cdba-0.jpg"
] | null | 858 |
Question: 63
Five students had five tests in one semester, and every test was graded on a scale of 0 to 20 points. Based on information from the table, which of the following students had the largest variance in his or her results, and which student had the largest mean value?
A. James had the largest variance, whil... | [
"\\boxed{A}"
] | 6d5ed995-2bd5-4f85-963a-dccfb496e0ba | [
"images/6d5ed995-2bd5-4f85-963a-dccfb496e0ba-0.jpg"
] | null | 859 |
Question: 75
In the scatter plot, how could the data be transformed in order to do a linear regression?
A. By squaring each data point y-value
B. By taking the natural logarithm of each data point y-value
C. By raising each data point y-value to the base 10
D. By taking the square root of each data point y-value
E. ... | [
"\\boxed{D}"
] | 85ed0034-b4f9-4399-ace9-31b15478fd07 | [
"images/85ed0034-b4f9-4399-ace9-31b15478fd07-0.jpg"
] | null | 860 |
Question: 88
Find and interpret r for the dataset.
A. r = 0.0903. There is a weak positive linear correlation.
B. r = -0.0903. There is a weak negative linear correlation.
C. r = 0.903. There is a strong positive linear correlation.
D. r = -0.903. There is a strong negative linear correlation.
E. r = 0.0903. There i... | [
"\\boxed{D}"
] | 92ad9e5a-3423-4c80-b7d8-a9c1131b424b | [
"images/92ad9e5a-3423-4c80-b7d8-a9c1131b424b-0.jpg"
] | null | 861 |
Question: 97
From the regression output below, calculate the percentage of unexplained variation in the dependent (response) variable.
A. 1.8%
B. 1.9%
C. 96.4%
D. 98.1%
E. 98.2% | [
"\\boxed{E}"
] | 6eb0fecd-d104-4061-9d5a-259747486504 | [
"images/6eb0fecd-d104-4061-9d5a-259747486504-0.jpg"
] | null | 862 |
Question: 175
What should be the height of the missing bar in the histogram?
A. 75
B. 0.7
C. 70
D. 60
E. 50 | [
"\\boxed{A}"
] | c666d6ca-684d-4cbb-8b0b-111a476486e9 | [
"images/c666d6ca-684d-4cbb-8b0b-111a476486e9-0.jpg"
] | null | 863 |
Question: 176
Suppose a cell phone company manufactures cell phones and tablets in the following four states: Arizona, California, Washington, and Minnesota. The table below shows the percentage of total output by state, and within each state, the percentage output of each product. What is the probability that a random... | [
"\\boxed{C}"
] | 29571e27-9554-43e3-a960-0dad7cd85584 | [
"images/29571e27-9554-43e3-a960-0dad7cd85584-0.jpg"
] | null | 864 |
Question: 204
The dataset below is based on a survey of 100 randomly selected travelers who were asked, "How many trips per year do you typically take?"
What is the probability that a randomly selected survey participant is male or takes two or fewer trips per year?
A. 0.17
B. 0.18
C. 0.36
D. 0.69
E. 0.86 | [
"\\boxed{D}"
] | af7479de-cc77-4341-90cf-1220edfcd43c | [
"images/af7479de-cc77-4341-90cf-1220edfcd43c-0.jpg"
] | null | 865 |
Question: 266
In a recent online survey of 1,700 adults, it was revealed that only 17% felt the Internet was secure. With what degree of confidence can you say that 17% ± 2% of adults believe that online security is secure?
A. 72.9%
B. 90%
C. 95%
D. 97.2%
E. 98.6% | [
"\\boxed{D}"
] | 9609ad0e-abe8-4f5a-9785-7da4ee8cce71 | [
"images/9609ad0e-abe8-4f5a-9785-7da4ee8cce71-0.jpg"
] | null | 866 |
Question: 283
While weighing five infants in the hospital we found their weights in kilograms to be 3.1, 3.5, 2.8, 3.2, and 3.4. What is a 90% confidence interval estimate of the infants' weights?
A. 3.2 ± 0.202
B. 3.2 ± 0.247
C. 3.2 ± 0.261
D. 4.0 ± 0.202
E. 4.0 ± 0.261 | [
"\\boxed{C}"
] | 4dbfcbfc-a9d9-4619-8af0-2e5f70a5d824 | [
"images/4dbfcbfc-a9d9-4619-8af0-2e5f70a5d824-0.jpg"
] | null | 867 |
Question: 284
A poll identifies the proportions of high-income and low-income voters who support a decrease in taxes. If we need to know the answer to be within ± 0.02 at the 95% confidence interval, what sample size should be taken?
A. 3383
B. 4803
C. 7503
D. 9453
E. 4503 | [
"\\boxed{B}"
] | 0406f017-8eef-4405-86d4-a89044da7e70 | [
"images/0406f017-8eef-4405-86d4-a89044da7e70-0.jpg"
] | null | 868 |
Question: 325
In a sample of 500 students from statistics courses in the fall semester, 312 earned a grade of C or higher. In the spring semester, 400 of the 525 students sampled earned a grade of C or higher. If we treat the fall semester as "sample 1" and the spring semester as "sample 2," what is the appropriate sta... | [
"\\boxed{B}"
] | 651259c3-0fc6-4ffd-a310-3c58279a6b4a | [
"images/651259c3-0fc6-4ffd-a310-3c58279a6b4a-0.jpg"
] | null | 869 |
Question: 399
A student is studying the relationship between the number of hours students work and their final exam scores in statistics courses. A regression analysis resulted in the computer output below.
What is the p-value that should be used to test H0 : β = 0 versus Ha : β > 0?
A. 0
B. 0.146
C. 0.292
D. 0.70... | [
"\\boxed{B}"
] | 6c34a6b8-cdfc-4bc7-8690-8ad6486b085d | [
"images/6c34a6b8-cdfc-4bc7-8690-8ad6486b085d-0.jpg"
] | null | 870 |
Question: 400
A student is studying the relationship between the number of hours students work and their final exam scores in statistics courses. A regression analysis resulted in the computer output below.
What is the t-test statistic that should be used to test H0 : β = 0 versus Ha : β â 0?
A. -3.22
B. -1.61
C... | [
"\\boxed{B}"
] | 77916314-01fd-469d-83b3-6ee6cfaba10f | [
"images/77916314-01fd-469d-83b3-6ee6cfaba10f-0.jpg"
] | null | 871 |
Question: 401
A student is studying the relationship between the number of hours students work and their final exam scores in statistics courses. A regression analysis resulted in the computer output below.
If the student used a sample of 10, which of the following is the 95% confidence interval for the true slope o... | [
"\\boxed{D}"
] | 60c5f947-7983-46b0-a073-cd634ca7dc0f | [
"images/60c5f947-7983-46b0-a073-cd634ca7dc0f-0.jpg"
] | null | 872 |
Question: 413
A public opinion poll surveyed a simple random sample of voters. Respondents were classified by gender and by voting preference (Republican, Democratic, or independent). Results are shown below.
If you conduct a chi-squared test for independence, what is the expected frequency count of male independent... | [
"\\boxed{A}"
] | 69d766f7-81c2-4961-81ef-deb3dc3c25c0 | [
"images/69d766f7-81c2-4961-81ef-deb3dc3c25c0-0.jpg"
] | null | 873 |
Question: 423
For the following two-way table, compute the value of Ï2.
A. 1.45
B. 4.167
C. 5.2
D. 5.55
E. None of the above | [
"\\boxed{B}"
] | 3cb54988-ed26-440a-ba9f-214ef95636aa | [
"images/3cb54988-ed26-440a-ba9f-214ef95636aa-0.jpg"
] | null | 874 |
Question: 424
A toy company published an advertisement in the local newspaper of a major city and in a children's magazine to see which medium generated more advertising viewership. A random sample of families was taken, and each family was asked to indicate where they had seen the product's advertisement. The results ... | [
"\\boxed{A}"
] | dd035f8a-ce5c-41d0-8a48-ae4c3444a7da | [
"images/dd035f8a-ce5c-41d0-8a48-ae4c3444a7da-0.jpg"
] | null | 875 |
Question: 437
A school class is going on a class trip, and a vote is being taken of where the class wants to go. The school expects that half of the students would want to go to Disney World, while the other half would want to go to visit Washington, DC Despite these expectations, only 42 students wanted to go to Washi... | [
"\\boxed{C}"
] | c04b1425-c946-4458-a2f6-eed263ab4a95 | [
"images/c04b1425-c946-4458-a2f6-eed263ab4a95-0.jpg"
] | null | 876 |
Question: 449
Given the contingency table below, determine the expected frequency of cell 1, 3.
A. 83.7
B. 85
C. 115
D. 116.7
E. 899 | [
"\\boxed{D}"
] | 4266d84f-5d54-464a-a2f2-f1169747d421 | [
"images/4266d84f-5d54-464a-a2f2-f1169747d421-0.jpg"
] | null | 877 |
Two half-cells are set up as follows:
Half-Cell A: Strip of Cu(s) in $CuNO_3(aq)$
Half-Cell B: Strip of Zn(s) in $Zn(NO_3)_2(aq)$
When the cells are connected according to the following diagram, the following reaction occurs. How many moles of electrons must be transferred to create 127 g of copper?
A. 1 mole of el... | [
"\\boxed{B}"
] | 47780e92-0c51-433b-8e7d-22fbcf3811ca | [
"images/47780e92-0c51-433b-8e7d-22fbcf3811ca-0.jpg"
] | null | 878 |
Two half-cells are set up as follows:
Half-Cell A: Strip of Cu(s) in $CuNO_3(aq)$
Half-Cell B: Strip of Zn(s) in $Zn(NO_3)_2(aq)$
When the cells are connected according to the following diagram, the following reaction occurs. As the reaction progresses, what will happen to the overall voltage of the cell?
A. It wil... | [
"\\boxed{C}"
] | 36f236f1-696f-49ba-b9d9-27f43a6d04c4 | [
"images/36f236f1-696f-49ba-b9d9-27f43a6d04c4-0.jpg"
] | null | 879 |
$NO_2$ gas is placed in a sealed, evacuated container and allowed to decompose via the following equation:
$2NO_2(g) ↔ 2NO(g) + O_2(g)$
The graph below indicates the change in concentration for each species over time. What is happening to the rate of the forward reaction at t = 60 s?
A. It is increasing.
B. It is de... | [
"\\boxed{C}"
] | 539c1ceb-6892-4894-81b6-7ea164ddb409 | [
"images/539c1ceb-6892-4894-81b6-7ea164ddb409-0.jpg"
] | null | 880 |
Regarding reaction II, to achieve the products present in the above diagram how many moles of each reactant must be present prior to the reaction?
A. 1.0 mol of CH$_4$ and 2.0 mol of H$_2$O
B. 2.0 mol of CH$_4$ and 2.0 mol of H$_2$O
C. 2.0 mol of CH$_4$ and 3.0 mol of H$_2$O
D. 3.0 mol of CH$_4$ and 2.0 mol of H$_2$O | [
"\\boxed{C}"
] | 480c4088-aab6-4eca-a2b8-650502512d66 | [
"images/480c4088-aab6-4eca-a2b8-650502512d66-0.jpg"
] | null | 881 |
The above diagrams shows the decomposition of hydrogen peroxide in a sealed container in the presence of a catalyst. What is the overall order for the reaction?
A. Zero order
B. First order
C. Second order
D. Third order | [
"\\boxed{B}"
] | c0d19eec-8e82-4d26-a095-de9e271eedf2 | [
"images/c0d19eec-8e82-4d26-a095-de9e271eedf2-0.jpg"
] | null | 882 |
One of the resonance structures for the nitrite ion is shown above. What is the formal charge on each atom?
A. O$_x$ -1; N +2; O$_y$ -1
B. O$_x$ +1; N -1; O$_y$ 0
C. O$_x$ 0; N 0 ; O$_y$ -1
D.O$_x$ -1; N 0 ; O$_y$ 0 | [
"\\boxed{D}"
] | 4b1ce91e-9877-48d3-902b-af1f042c866d | [
"images/4b1ce91e-9877-48d3-902b-af1f042c866d-0.jpg"
] | null | 883 |
What is the equilibrium expression for the reaction
A. \( K = \frac{[CO_2]^3}{[O_2]^5} \)
B. \( K = \frac{[C_3H_8][O_2]^5}{[CO_2]^3[H_2O]^4} \)
C. \( K = \frac{[C_3H_8]}{[H_2O]^4} \)
D. \( K = \frac{[O_2]^5}{[CO_2]^3} \) | [
"\\boxed{A}"
] | 77797645-ca01-49d8-89a0-46f7c5e7ad73 | [
"images/77797645-ca01-49d8-89a0-46f7c5e7ad73-0.jpg"
] | null | 884 |
Given the two standard reduction equations and their potentials below, write the thermodynamically favored chemical reaction and its standard cell potential.
A. $\text{Ag}^+ (\text{aq}) + \text{Mg}^{2+} (\text{aq}) \rightarrow \text{Ag}(\text{s}) + \text{Mg}(\text{s}) & -1.57\ V $
B. $\text{Ag}^+ (\text{aq}) + \text{M... | [
"\\boxed{C}"
] | 0e4a482e-ddf6-4bc9-9108-14913730fd6d | [
"images/0e4a482e-ddf6-4bc9-9108-14913730fd6d-0.jpg"
] | null | 885 |
Three 1-liter flasks are connected to a 3-liter flask by valves. The 3-liter flask is evacuated to start and the entire system is at 298K. The first flask contains helium, the second argon, and the third krypton. The pressure of the argon is 633 torr. The amounts of gas are proportional to their representations in the ... | [
"\\boxed{B}"
] | adbe8d49-64c8-4fbd-ac52-bee8e6e792dc | [
"images/adbe8d49-64c8-4fbd-ac52-bee8e6e792dc-0.jpg"
] | null | 886 |
The above graph shows a titration curve of a weak base titrated with a strong acid. The pH was measured with a pH meter after small volumes of 0.075 M HCl were added to 25.0 mL of a weak base. Data from that experiment are shown in the graph. Which arrow points to the end point of this titration?
A. A
B. E
C. C
D.... | [
"\\boxed{B}"
] | 415294a7-4f2c-4e7d-a661-7b668aedc0f7 | [
"images/415294a7-4f2c-4e7d-a661-7b668aedc0f7-0.jpg"
] | null | 887 |
The above graph shows a titration curve of a weak base titrated with a strong acid. The pH was measured with a pH meter after small volumes of 0.075 M HCl were added to 25.0 mL of a weak base. Data from that experiment are shown in the graph. Find the two points on the curve that indicate the region where the solution ... | [
"\\boxed{C}"
] | 4cb20f7d-afca-47fe-8164-2a03da83fa49 | [
"images/4cb20f7d-afca-47fe-8164-2a03da83fa49-0.jpg"
] | null | 888 |
Three 1-liter flasks are connected to a 3-liter flask by valves as shown in the diagram above. The 3-liter flask has the relative number of helium atoms as indicated. At the start, the entire system is at 585K. The first flask contains oxygen; the second contains hydrogen, and the third contains nitrogen. The pressure ... | [
"\\boxed{B}"
] | dc238e4c-6a3b-423c-8327-17a5ec37d81d | [
"images/dc238e4c-6a3b-423c-8327-17a5ec37d81d-0.jpg"
] | null | 889 |
Which of the labeled arrows in the diagram above represents the strongest intermolecular force of the four indicated?
A. Arrow A
B. Arrow B
C. Arrow C
D. Arrow D | [
"\\boxed{A}"
] | f55d1929-ccd3-44ee-b20d-8c8b996893e4 | [
"images/f55d1929-ccd3-44ee-b20d-8c8b996893e4-0.jpg"
] | null | 890 |
The diagram above shows the structure of molecules of CS$_2$ and COS. The boiling point of COS is 223 K, and the boiling point of CS2 is 319 K. Which of the following is the best explanation of why the boiling point of CS$_2$ is higher?
A. The molar mass of CS$_2$ is greater.
B. COS has weaker covalent bonds than CS$_... | [
"\\boxed{A}"
] | 7b18d87c-d205-4233-9aa2-b0b5a1591978 | [
"images/7b18d87c-d205-4233-9aa2-b0b5a1591978-0.jpg"
] | null | 891 |
In the diagram above, which labeled arrow is pointing toward a hydrogen bond?
A. 1
B. 2
C. 3
D. 4 | [
"\\boxed{C}"
] | b080e844-e135-4566-add0-726d6f03d5a7 | [
"images/b080e844-e135-4566-add0-726d6f03d5a7-0.jpg"
] | null | 892 |
The graph above shows the distribution of kinetic energies of a large number of Ne atoms at 500 K. Which letter shows the average kinetic energy of this system?
A. A
B. B
C. C
D. D | [
"\\boxed{C}"
] | f169da0b-974c-4288-b5ee-2b8145477c45 | [
"images/f169da0b-974c-4288-b5ee-2b8145477c45-0.jpg"
] | null | 893 |
The graph above shows the distribution of kinetic energies of a large number of Ne atoms at 500 K. Which letter shows the average kinetic energy of this system?
A. A
B. B
C. C
D. D | [
"\\boxed{C}"
] | 2cdd03c4-882b-4bba-a908-9e1808e957d4 | [
"images/2cdd03c4-882b-4bba-a908-9e1808e957d4-0.jpg"
] | null | 894 |
The above graph shows a titration curve of a weak base titrated with a strong acid. The pH was measured with a pH meter after small volumes of 0.075 M HCl were added to 25.0 mL of a weak base. Data from that experiment are shown in the graph. Which arrow points to the end point of this titration?
A. A
B. E
C. C
D.... | [
"\\boxed{B}"
] | 466c2087-0790-440b-a060-9529f6a8d18f | [
"images/466c2087-0790-440b-a060-9529f6a8d18f-0.jpg"
] | null | 895 |
A student is attempting to use a distillation apparatus, shown below, to separate a mixture of propanol (boiling point: 97°C) and propionic acid (boiling point: 141°C). Which temperature should the apparatus be set at to obtain as pure a distillate of propanol as possible?
A. 85°C
B. 105°C
C. 125°C
D. 145°C | [
"\\boxed{B}"
] | cb1f4b59-c86b-43a0-adab-5cdc516dc5a8 | [
"images/cb1f4b59-c86b-43a0-adab-5cdc516dc5a8-0.jpg"
] | null | 896 |
Two batteries are constructed via the diagram below. The concentration of the solutions and the mass of the electrodes are identified in the data below the diagram. How would the voltage and the battery life for the two batteries compare?Voltage Battery Life
A. X <Y X <Y
B. X <Y X =Y
C. X =Y X =... | [
"\\boxed{D}"
] | c15114f0-59cc-45b1-b93a-cdd8a1487082 | [
"images/c15114f0-59cc-45b1-b93a-cdd8a1487082-0.jpg"
] | null | 897 |
$Cu^{2+}$ ions appear blue in solution, and the $NO_3^-$ ion is colorless. The absorbance of a $Cu(NO_3)_2$ solution is measured at various wavelengths using a spectrophotometer. To determine the concentration of a $Cu(NO_3)_2$ solution of unknown concentration, what wavelength of light would produce the best results?
... | [
"\\boxed{C}"
] | 5424e2a4-16e9-4921-9df7-5f45a0ad73fd | [
"images/5424e2a4-16e9-4921-9df7-5f45a0ad73fd-0.jpg"
] | null | 898 |
Ox N Oy
One of the resonance structures for the nitrite ion is shown below. What is the formal charge on each atom?
A. -1 +1 -1
B. +1 -1 0
C. 0 0 -1
D. -1 0 0 | [
"\\boxed{D}"
] | 0842a7b1-9a6d-4595-8af1-5e9fabd38246 | [
"images/0842a7b1-9a6d-4595-8af1-5e9fabd38246-0.jpg"
] | null | 899 |
Identify the three gases represented on the Maxwell-Boltzmann diagram below. Assume all gases are at the same temperature.I II III
A. $H_2$ $N_2$ $F_2$
B. $H_2$ $F_2$ $N_2$
C. $F_2$ $N_2$ $H_2$
D. $N_2$ $F_2$ $H_2$ | [
"\\boxed{C}"
] | c3f4f423-2f80-4b0b-9cdd-a3427fbd156d | [
"images/c3f4f423-2f80-4b0b-9cdd-a3427fbd156d-0.jpg"
] | null | 900 |
The following curve is obtained during the titration of 30.0 mL of 1.0 M NH3, a weak base, with a strong acid:What is the concentration of the acid?
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M | [
"\\boxed{D}"
] | 059b512e-0572-4e8b-b3d3-443a6b4ce3c3 | [
"images/059b512e-0572-4e8b-b3d3-443a6b4ce3c3-0.jpg"
] | null | 901 |
The diagram below shows three identical 1.0 L containers filled with the indicated amounts of gas. The stopcocks connecting the containers are originally closed and the gases are all at 25°C. Assume ideal behavior.The stopcocks are opened. If the tubing connecting the containers has negligible volume, by what percentag... | [
"\\boxed{D}"
] | 4ce54476-75d0-438a-82fd-d5fd2b0d170e | [
"images/4ce54476-75d0-438a-82fd-d5fd2b0d170e-0.jpg"
] | null | 902 |
The diagram below shows three identical 1.0 L containers filled with the indicated amounts of gas. The stopcocks connecting the containers are originally closed and the gases are all at 25°C. Assume ideal behavior. Which gas exerts the greatest pressure?
A. He
B. Ne
C. NO
D. All gases exert the same amount of pressure. | [
"\\boxed{A}"
] | fb4be1a6-bbed-4296-a20e-1fd7342cc6de | [
"images/fb4be1a6-bbed-4296-a20e-1fd7342cc6de-0.jpg"
] | null | 903 |
Which of the following statements regarding the structure B is true?
There are several different potential Lewis diagrams for the sulfate ion, two of which are below.
A. The double bonds must be located opposite of each other due to additional electron repulsion.
B. It is a more polar molecule than the molecule represe... | [
"\\boxed{D}"
] | d151ed9e-b499-4b04-87ba-3ba95cb5ec73 | [
"images/d151ed9e-b499-4b04-87ba-3ba95cb5ec73-0.jpg"
] | null | 904 |
The marks on the following target represent someone who is:
A.accurate, but not precise.
B.precise, but not accurate.
C.both accurate and precise.
D.neither accurate nor precise. | [
"\\boxed{D}"
] | 86d8cbd6-2d7d-43f5-886e-9ab775ce72c9 | [
"images/86d8cbd6-2d7d-43f5-886e-9ab775ce72c9-0.png"
] | null | 905 |
Pictured below is a schematic of the Rutherford experiment. Which scattered -particle gives the best evidence for the nuclear atom?
A. a
B. b
C. c
D. d | [
"\\boxed{A}"
] | 356b7ae1-b607-4bf1-a424-f814d18cc240 | [
"images/356b7ae1-b607-4bf1-a424-f814d18cc240-0.png"
] | null | 906 |
What position on the standing wave shown below corresponds to a crest?
A. a
B. b
C. c
D. d
E. e | [
"\\boxed{B}"
] | 8e4cac95-94d0-49b0-8e66-512dab59d492 | [
"images/8e4cac95-94d0-49b0-8e66-512dab59d492-0.png"
] | null | 907 |
The titration curves labeled 1 and 2 were obtained by titrating equal volumes of two different acid samples with portions of the same sodium hydroxide solution. What conclusions can be drawn about the relative concentrations and strengths of acids 1 and 2 from these curves?
(A) The concentrations are the same but acid... | [
"\\boxed{A}"
] | 371f8d5e-29f8-404d-84ac-0f3f98f4a4cc | [
"images/371f8d5e-29f8-404d-84ac-0f3f98f4a4cc-0.png"
] | null | 908 |
In an experiment, a solid 1 molar sample of Substance A was gradually heated by a source of constant energy for several hours and the temperature was measured periodically. At the end of the heating period, Substance A had been converted to the gas phase. The heating curve produced by this experiment is shown below. Du... | [
"\\boxed{A}"
] | 00194e97-4dbb-46ab-9046-8c945f4fb510 | [
"images/00194e97-4dbb-46ab-9046-8c945f4fb510-0.png"
] | null | 909 |
Which of the following is true of the reactions shown in the diagram above?
(A) The reaction is endothermic because the reactants are at a higher energy level than the products.
(B) The reaction is endothermic because the reactants are at a lower energy level than the products.
(C) The reaction is exothermic because t... | [
"\\boxed{C}"
] | 9da62e77-c8dd-42bb-be95-df1c3f0bfeec | [
"images/9da62e77-c8dd-42bb-be95-df1c3f0bfeec-0.png"
] | null | 910 |
The formal charge on carbon in the molecule below is.
A) 0
B) +1
C) -1
D) +3
E) +2 | [
"\\boxed{A}"
] | fe6efa2d-8b14-4d44-b076-4b9bbb93e004 | [
"images/fe6efa2d-8b14-4d44-b076-4b9bbb93e004-0.png"
] | null | 911 |
Based on the figure above, the boiling point of ethyl alcohol under an external pressure of 0.0724 atm is
________eC.
A) 60
B) 20
C) 70
D) 80
E) 40 | [
"\\boxed{B}"
] | c7fe71cf-d145-42dd-9369-1a370172f06a | [
"images/c7fe71cf-d145-42dd-9369-1a370172f06a-0.png"
] | null | 912 |
The graph shown below depicts the relationship between concentration and time for the following chemical
reaction. The slope of this line is equal to __________.
A) -k
B) -1/k
C) k
D) ln[A]o
E) 1/k | [
"\\boxed{A}"
] | 090b8d5f-8df2-440e-934b-f2a8964dad6d | [
"images/090b8d5f-8df2-440e-934b-f2a8964dad6d-0.png"
] | null | 913 |
Which energy difference in the energy profile below corresponds to the activation energy for the forward
reaction?
A) x
B) y
C) x + y
D) y - x
E) x - y | [
"\\boxed{A}"
] | 43d32340-d18d-4da8-9c63-36175a684c23 | [
"images/43d32340-d18d-4da8-9c63-36175a684c23-0.png"
] | null | 914 |
Consider the following table of $K_{sp}$ values. The solubility of manganese hydroxide ($Mn(OH)_2$) is 2.2e-5 M. What is the Ksp of $Mn(OH)_2$?
A) 2.1e-14
B) 4.3e-14
C) 1.1e-14
D) 2.2e-5
E) 4.8e-10 | [
"\\boxed{B}"
] | d291f4b1-fab8-462a-adf2-c3d386ef8c4d | [
"images/d291f4b1-fab8-462a-adf2-c3d386ef8c4d-0.png"
] | null | 915 |
The data below concerns the general animal body plan of five organisms
The two most closely related organisms are
A. sea anemone and hagfish
B. eel and salamander
C. hagfish and eel
D. sea anemone and salamande | [
"\\boxed{B}"
] | b72c87ff-cc12-4092-8de3-65f148c401a5 | [
"images/b72c87ff-cc12-4092-8de3-65f148c401a5-0.jpg"
] | null | 916 |
In the following cladogram, a common ancestor (*) and species derived from it are illustrated. How many species have four or more common ancestors with Iguanodon?
A. 1
B. 2
C. 4
D. 6 | [
"\\boxed{D}"
] | bc7000a9-7c70-4e8c-bd6e-e517e6eff893 | [
"images/bc7000a9-7c70-4e8c-bd6e-e517e6eff893-0.jpg"
] | null | 917 |
A population of goldfish in a large, isolated pond were studied in 1958 and again in 2008. The fishes' pigment level varied from pale white-orange fish to dark brown-orange fish. The color of each of the fish was recorded in the figure below.Which addition to the pond did NOT likely contribute to the change between 195... | [
"\\boxed{A}"
] | 853eb22a-2aaa-4cb8-90ff-dc621a0a8be3 | [
"images/853eb22a-2aaa-4cb8-90ff-dc621a0a8be3-0.jpg"
] | null | 918 |
A population of goldfish in a large, isolated pond were studied in 1958 and again in 2008. The fishes' pigment level varied from pale white-orange fish to dark brown-orange fish. The color of each of the fish was recorded in the figure below.Which of the following theories is supported by the evidence?
A. The pigment t... | [
"\\boxed{D}"
] | b8775733-4711-4157-b997-85fae9062878 | [
"images/b8775733-4711-4157-b997-85fae9062878-0.jpg"
] | null | 919 |
A group of Daphnia, small crustaceans known as water fleas, was placed in one of three culture jars of different sizes to determine their reproductive rate. There were 100 females in the jar. The graph below shows the average number of offspring produced per female each day in each jar of pond water.The data in the fig... | [
"\\boxed{B}"
] | ed6efc50-8823-421f-a510-5fc704a35855 | [
"images/ed6efc50-8823-421f-a510-5fc704a35855-0.jpg"
] | null | 920 |
An experiment was performed to assess the growth of two species of plants when they were grown in different pHs, given different volumes of water, and watered at different times of day over 6 weeks. Two plants were grown of each species and the average heights (in cm) are shown in the table.Which pH and volume were lik... | [
"\\boxed{D}"
] | 54855d83-b824-49da-bbfc-19b98d2fd7bd | [
"images/54855d83-b824-49da-bbfc-19b98d2fd7bd-0.jpg"
] | null | 921 |
Note: + indicates a feature present in an organism.
Questions below refer to the data below concerning the general animal body plan of four organisms.The two most closely related organisms are
A. sea anemone and hagfish
B. eel and salamander
C. hagfish and eel
D. sea anemone and salamander | [
"\\boxed{B}"
] | bb24d8a6-8458-485a-bcf3-a3e51a2f305b | [
"images/bb24d8a6-8458-485a-bcf3-a3e51a2f305b-0.jpg"
] | null | 922 |
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in t... | [
"\\boxed{D}"
] | e4daa6e7-d9ea-491a-a29c-4c94f57ad9dd | [
"images/e4daa6e7-d9ea-491a-a29c-4c94f57ad9dd-0.jpg"
] | null | 923 |
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in t... | [
"\\boxed{A}"
] | e8984495-f1a3-4051-aeef-3ba595f92644 | [
"images/e8984495-f1a3-4051-aeef-3ba595f92644-0.jpg"
] | null | 924 |
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in t... | [
"\\boxed{D}"
] | 61b35f66-6eab-4f54-ab96-c0b97792cfd2 | [
"images/61b35f66-6eab-4f54-ab96-c0b97792cfd2-0.jpg"
] | null | 925 |
The cell cycle is a series of events in the life of a dividing eukaryotic cell. It consists of four stages: G1, S, G2, and M. The duration of the cell cycle varies from one species to another and from one cell type to another. The G1 phase varies the most. For example, embryonic cells can pass through the G1 phase so q... | [
"\\boxed{C}"
] | bd4ac422-b606-44dc-9cb7-a228f0558b02 | [
"images/bd4ac422-b606-44dc-9cb7-a228f0558b02-0.jpg"
] | null | 926 |
It is difficult to determine exactly how life began. Answer the following questions as if the following data had been collected billions of years ago.Which best describes the origin of life according to the data?
A. Life required an environment with atmospheric oxygen and any type of nucleic acids.
B. Life required an ... | [
"\\boxed{C}"
] | 313c82af-fd34-444c-a563-5bfbdd9e1458 | [
"images/313c82af-fd34-444c-a563-5bfbdd9e1458-0.jpg"
] | null | 927 |
The following are important pieces of replication and transcription machinery:What might have occurred to produce the following situation?
A. Stalled DNA replication
B. Initiation of transcription
C. Repression of transcription
D. Crossing-over in meiosis | [
"\\boxed{C}"
] | c4c092c7-a89f-47f2-8545-5c3091d02a80 | [
"images/c4c092c7-a89f-47f2-8545-5c3091d02a80-0.jpg"
] | null | 928 |
The graph below shows two growth curves for bacterial cultures, A and B.Which of the following represents the carrying capacity for culture B?
A. 10
B. 50
C. 100,000
D. 1,000,000 | [
"\\boxed{C}"
] | 64304906-6429-46b7-9b0b-752d0bbf47de | [
"images/64304906-6429-46b7-9b0b-752d0bbf47de-0.jpg"
] | null | 929 |
The Loop of Henle is a structure within each of the million nephrons within a kidney. As shown in the figure, the two sides have different permeabilities, and there is differential movement across each membrane. The Loop acts as a counter-current multiplier that makes the medulla of the kidney very osmotic. The longer ... | [
"\\boxed{A}"
] | a9b25e01-95b9-4ce4-a767-1b7b5698433b | [
"images/a9b25e01-95b9-4ce4-a767-1b7b5698433b-0.jpg"
] | null | 930 |
The affinity of hemoglobin for oxygen is reduced by many factors, including low pH and high CO2. The graph below shows the different dissociation curves that maternal (normal) hemoglobin and fetal hemoglobin have.Which of the following processes would likely shift the normal dissociation curve to the right?
A. Photosyn... | [
"\\boxed{C}"
] | ab6741c9-ce1c-45cb-a02e-3243ab505f2b | [
"images/ab6741c9-ce1c-45cb-a02e-3243ab505f2b-0.jpg"
] | null | 931 |
The enzymatic catalysis of a reaction essential in the production of dog saliva is mediated by the protein ARKKKK60491. ARKKKK60491 is a homodimer, with each subunit being 337 amino acids. Figure 1, below, indicates a modular structure of the homodimer. Three positions are indicated on the model. Position A is the acti... | [
"\\boxed{D}"
] | c7e6464f-c781-4765-8613-20a51c069231 | [
"images/c7e6464f-c781-4765-8613-20a51c069231-0.jpg"
] | null | 932 |
A chain of three small islands was found to be the home to a small species of mouse. The angle of jaw opening was found to vary significantly. The average size angle of the maximal jaw opening found in mice at 10 locations on the three small islands is shown in Figure 1, below.Skeletons have been found that indicate th... | [
"\\boxed{A}"
] | 6654610b-9e23-48d1-86a2-25be13c78715 | [
"images/6654610b-9e23-48d1-86a2-25be13c78715-0.jpg"
] | null | 933 |
A gene responsible for production of hair pigment in dogs is called Fursilla (frsl). A map of the Fursilla locus is shown in Figure 1, below. When expressed, it results in darkly pigmented dog fur. When unexpressed, the hair is devoid of pigmentation and appears pure white. Expression of Fursilla (frsl) depends on the ... | [
"\\boxed{D}"
] | 4fb7c6fe-3e85-4c12-9405-6c768efd7fc8 | [
"images/4fb7c6fe-3e85-4c12-9405-6c768efd7fc8-0.jpg"
] | null | 934 |
The active site of the enzyme Ritzolinine (RZN45) contains three positively charged lysine residues. When ascorbic acid is present, binding of JB-76, the substrate of RZN45, decreases. The reaction rate is affected by the presence of ascorbic acid as shown in the figure below. It is thought that a daily supplement of V... | [
"\\boxed{C}"
] | fdbbd11d-ca42-47ef-b998-9e1ebd12b299 | [
"images/fdbbd11d-ca42-47ef-b998-9e1ebd12b299-0.jpg"
] | null | 935 |
The active site of the enzyme Ritzolinine (RZN45) contains three positively charged lysine residues. When ascorbic acid is present, binding of JB-76, the substrate of RZN45, decreases. The reaction rate is affected by the presence of ascorbic acid as shown in the figure below. It is thought that a daily supplement of V... | [
"\\boxed{A}"
] | 63b26b53-5fb7-451e-8f42-9a2c1816a352 | [
"images/63b26b53-5fb7-451e-8f42-9a2c1816a352-0.jpg"
] | null | 936 |
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