Chemistry NMDCAT MCQs Moles and Avogadro's Numbers Moles and Avogadro’s Numbers

nmdcat.online July 13, 2026

During the combustion reaction CH₄ + 2O₂ → CO₂ + 2H₂O, complete combustion of 3 moles of methane produces

A. 2 moles of CO₂

B. 3 moles of CO₂

✓

C. 4 moles of CO₂

D. 6 moles of CO₂

📝 Explanation

The balanced equation shows a 1 : 1 mole ratio between CH₄ and CO₂. Thus, 3 moles of methane produce 3 moles of carbon dioxide. Concept tested: Mole ratio application.

📖 Additional Information

2 moles of CO₂
3 moles of CO₂
4 moles of CO₂
6 moles of CO₂

The balanced equation shows a 1 : 1 mole ratio between CH₄ and CO₂. Thus, 3 moles of methane produce 3 moles of carbon dioxide. Concept tested: Mole ratio application.

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