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

nmdcat.online July 13, 2026

Regarding the balanced equation 2CO + O₂ → 2CO₂, complete reaction of 5 moles of carbon monoxide requires

A. 1.5 moles of O₂

B. 2.0 moles of O₂

C. 2.5 moles of O₂

✓

D. 5.0 moles of O₂

📝 Explanation

The balanced equation shows that 2 moles of CO require 1 mole of O₂. Therefore, 5 moles of CO require 2.5 moles of O₂. Concept tested: Mole ratio application.

📖 Additional Information

1.5 moles of O₂
2.0 moles of O₂
2.5 moles of O₂
5.0 moles of O₂

The balanced equation shows that 2 moles of CO require 1 mole of O₂. Therefore, 5 moles of CO require 2.5 moles of O₂. Concept tested: Mole ratio application.

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