Chemistry NMDCAT MCQs Moles and Avogadro's Numbers Moles and Avogadro’s Numbers

nmdcat.online July 2, 2026

In the reaction CS₂ + 3O₂ → CO₂ + 2SO₂, the mass of SO₂ produced from 19.0 g of CS₂ (Molar masses: CS₂ = 76 g/mol, SO₂ = 64 g/mol) is

A. 8 g

B. 16 g

C. 64 g

D. 32 g

✓

📝 Explanation

Moles of CS₂ = 19/76 = 0.25 mol. According to the equation, 1 mol CS₂ produces 2 mol SO₂. Therefore, 0.25 mol CS₂ forms 0.5 mol SO₂. Mass = 0.5 × 64 = 32 g.

📖 Additional Information

8 g
16 g
64 g
32 g

Moles of CS₂ = 19/76 = 0.25 mol. According to the equation, 1 mol CS₂ produces 2 mol SO₂. Therefore, 0.25 mol CS₂ forms 0.5 mol SO₂. Mass = 0.5 × 64 = 32 g.

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