MHT CET Chemistry question

The number of moles of oxygen in one litre of air containing 21% oxygen by volume, in standard conditions, is

Answer: (D)

Solution

Volume of O₂ = 0.21 L, so moles = 0.21/22.4 ≈ 0.0094 ≈ 0.0093 mol; 0.21 is the volume in

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Question ID VK-041239