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

nmdcat.online July 13, 2026

During a stoichiometric calculation, 2 moles of oxygen molecules contain

A. 6.02 × 10²³ oxygen molecules

B. 1.20 × 10²⁴ oxygen molecules

✓

C. 2.41 × 10²⁴ oxygen molecules

D. 3.01 × 10²³ oxygen molecules

📝 Explanation

Two moles contain 2 × 6.02 × 10²³ = 1.20 × 10²⁴ molecules. The remaining values correspond to incorrect multiples. Concept tested: Avogadro's number.

📖 Additional Information

6.02 × 10²³ oxygen molecules
1.20 × 10²⁴ oxygen molecules
2.41 × 10²⁴ oxygen molecules
3.01 × 10²³ oxygen molecules

Two moles contain 2 × 6.02 × 10²³ = 1.20 × 10²⁴ molecules. The remaining values correspond to incorrect multiples. Concept tested: Avogadro's number.

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