A sample of an unknown gas has a density of 2.857 g/l at STP. Identify the gas.
- CO₂
- SO₂
- O₂
- Cl₂
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M = 2.857 × 22.4 ≈ 64 g/mol.M(SO₂) = 32 + 2×16 = 64 g/mol.
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