AI Chemistry Quiz Solver

How AI Chemistry Quiz Solver Works

Example Interactions

Topic Enter: Stoichiometry

Question: “How many moles of oxygen gas are required to completely react with 4 moles of propane (\(C_3H_8\)) in the combustion reaction?”

Options:
A) 4 moles
B) 10 moles
C) 16 moles
D) 20 moles

Correct Answer: (D) 20 moles

Evaluation (How MathCrave handles your chemistry quiz)

• If the student selects D:
  “Correct!_ The balanced combustion reaction for propane is:
  \(C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O\).
  From the reaction, 1 mole of propane reacts with 5 moles of oxygen. For 4 moles of propane, the required moles of oxygen are:
  \(4 \times 5 = 20 \, \text{moles}\).”_
• If the student selects any other option:
  “Incorrect. The correct answer is D) 20 moles. The balanced equation shows that 1 mole of propane reacts with 5 moles of oxygen. Since you have 4 moles of propane, you multiply 4 by 5 to get 20 moles of oxygen required.”_

Topic Enter: Periodic Trends

Question:  “Which element has the highest electronegativity?”

Options:
A) Oxygen
B) Fluorine
C) Nitrogen
D) Chlorine

Correct Answer: B) Fluorine

Evaluation

•  If the student selects B:
  “Correct!_ Fluorine has the highest electronegativity with a value of 3.98 on the Pauling scale. It is the most electronegative element due to its small atomic size and high nuclear charge, which strongly attracts bonding electrons.”
•  If the student selects any other option:
  “Incorrect. The correct answer is B) Fluorine. While oxygen and chlorine are also highly electronegative, fluorine has the highest value on the Pauling scale because of its small size and strong ability to attract electrons.”

Topic Enter: pH Calculation

Question:  “What is the pH of a solution with a hydrogen ion concentration of \(1 \times 10^{-4}\, \text{M}\)?”

Options:
A) 2
B) 3
C) 4
D) 5

Correct Answer: C) 4

Evaluation

• If the student selects C:
  “Correct!_ The formula for pH is:
  \( \text{pH} = -\log[\text{H}^+] \).
  Substituting \( [\text{H}^+] = 1 \times 10^{-4} \):
  \( \text{pH} = -\log(1 \times 10^{-4}) = 4. \)”_
• If the student selects any other option:
  “Incorrect. The correct answer is C) 4. The formula for pH is \( \text{pH} = -\log[\text{H}^+] \). Substituting the given concentration, \( \text{pH} = -\log(1 \times 10^{-4}) \), which simplifies to 4.”

Topic Enter:  Reaction Balancing

Question: “Balance the equation: \( \text{NH}_3 + \text{O}_2 \rightarrow \text{NO} + \text{H}_2\text{O} \).”

How many moles of \( \text{O}_2 \) are needed to balance the reaction?

Options:
A) 2 moles
B) 3 moles
C) 5 moles
D) 4 moles

Correct Answer: C) 5 moles

Evaluation

• If the student selects C:
   “Correct!_ The balanced equation is:
  \( 4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O} \).
  This shows that 5 moles of oxygen are needed to react with 4 moles of ammonia.”_
• If the student selects any other option:
  “Incorrect. The correct answer is C) 5 moles. Balancing the reaction gives:
  \( 4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O} \), which requires 5 moles of oxygen for every 4 moles of ammonia.”_