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

The number of moles of water of crystallization in 143.5 g of washing soda (Na₂CO₃·10H₂O) is

A. 10
B. 0.5
C. 5
✓
D. 1

📝 Explanation

143.5 g = 0.5 mole washing soda. Water = 0.5 × 10 = 5 moles.

📖 Additional Information

  • 10
  • 0.5
  • 5
  • 1

143.5 g = 0.5 mole washing soda. Water = 0.5 × 10 = 5 moles.

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