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

The total number of ions in 0.1 moles of aluminium sulphate, Al₂(SO₄)₃, is

A. 6.022 × 10²³
B. 6.022 × 10²²
C. 3.011 × 10²³
✓
D. 3.011 × 10²²

📝 Explanation

One formula unit produces 5 ions (2 Al³⁺ + 3 SO₄²⁻). Therefore, 0.1 mol gives 0.5 mol ions = 3.011 × 10²³ ions.

📖 Additional Information

  • 6.022 × 10²³
  • 6.022 × 10²²
  • 3.011 × 10²³
  • 3.011 × 10²²

One formula unit produces 5 ions (2 Al³⁺ + 3 SO₄²⁻). Therefore, 0.1 mol gives 0.5 mol ions = 3.011 × 10²³ ions.

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