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

During a chemical calculation, 18 g of water corresponds to

A. 0.5 mole
B. 1 mole
✓
C. 2 moles
D. 18 moles

📝 Explanation

The molar mass of H₂O is 18 g mol⁻¹. Therefore, 18 g represents exactly one mole. Concept tested: Mass-mole relationship.

📖 Additional Information

  • 0.5 mole
  • 1 mole
  • 2 moles
  • 18 moles

The molar mass of H₂O is 18 g mol⁻¹. Therefore, 18 g represents exactly one mole. Concept tested: Mass-mole relationship.

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