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Chemistry NMDCAT MCQs Moles and Avogadro's Numbers Moles and Avogadro’s Numbers
nmdcat.online July 13, 2026

Regarding the balanced equation 2H₂ + O₂ → 2H₂O, the mole ratio between hydrogen and oxygen is

A. 1:02
B. 2:01
✓
C. 2:02
D. 1:01

📝 Explanation

The coefficients in a balanced equation represent mole ratios. Here, 2 moles of H₂ react with 1 mole of O₂. The other ratios do not match the balanced equation. Concept tested: Mole ratio from a balanced equation.

📖 Additional Information

  • 1:02
  • 2:01
  • 2:02
  • 1:01

The coefficients in a balanced equation represent mole ratios. Here, 2 moles of H₂ react with 1 mole of O₂. The other ratios do not match the balanced equation. Concept tested: Mole ratio from a balanced equation.

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