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

nmdcat.online July 13, 2026

During a chemical calculation, 0.25 mole of methane contains

A. 1.51 × 10²³ molecules

✓

B. 3.01 × 10²³ molecules

C. 6.02 × 10²³ molecules

D. 7.53 × 10²² molecules

📝 Explanation

One mole contains 6.02 × 10²³ molecules. Therefore, 0.25 mole contains one-fourth of this value, equal to 1.51 × 10²³ molecules. Concept tested: Representative particles.

📖 Additional Information

1.51 × 10²³ molecules
3.01 × 10²³ molecules
6.02 × 10²³ molecules
7.53 × 10²² molecules

One mole contains 6.02 × 10²³ molecules. Therefore, 0.25 mole contains one-fourth of this value, equal to 1.51 × 10²³ molecules. Concept tested: Representative particles.

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