Update app.py

app.py

@@ -103,10 +103,10 @@ if selected_components:
 
 # Normalizar concentraciones
 ci = np.array([concentrations[comp] for comp in selected_components])
-#if np.sum(ci) > 0:
-#    ci /= np.sum(ci)
-#else:
-#    st.error("The sum of the concentrations must be greater than 0.")
+if np.sum(ci) > 0:
+    ci /= np.sum(ci)
+else:
+    st.error("The sum of the concentrations must be greater than 0.")
 
 T = st.slider("Temperature (°F):", min_value=-100.0, max_value=300.0, value=160.0) + 459.67
 P = st.slider("Pressure (psia):", min_value=50.0, max_value=5000.0, value=2000.0)