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Chemistry NMDCAT MCQs Moles and Avogadro's Numbers Moles and Avogadro’s Numbers
nmdcat.online July 2, 2026

The mass of one atom of an element is 2.66 × 10⁻²³ g. The atomic mass of the element is approximately

A. 16 u
✓
B. 32 u
C. 12 u
D. 40 u

📝 Explanation

Atomic mass = mass of one atom × Avogadro's number = 2.66 × 10⁻²³ × 6.022 × 10²³ ≈ 16 u.

📖 Additional Information

  • 16 u
  • 32 u
  • 12 u
  • 40 u

Atomic mass = mass of one atom × Avogadro's number = 2.66 × 10⁻²³ × 6.022 × 10²³ ≈ 16 u.

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