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

A sample containing 1.505 × 10²³ molecules of carbon dioxide has a mass of

A. 5.5 g
B. 11 g
✓
C. 22 g
D. 44 g

📝 Explanation

The sample contains 0.25 mole of CO₂. Since one mole weighs 44 g, the mass is 11 g.

📖 Additional Information

  • 5.5 g
  • 11 g
  • 22 g
  • 44 g

The sample contains 0.25 mole of CO₂. Since one mole weighs 44 g, the mass is 11 g.

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