A sample of nitrogen gas has a mass of 5.6 g. Calculate the volume, in dm³, of this gas at s.t.p. [Relative atomic mass: N = 14]

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Question

A sample of nitrogen gas has a mass of 5.6 g. Calculate the volume, in dm³, of this gas at s.t.p. [Relative atomic mass: N = 14]

Accepted Answer

4.48 dm³ — Award 1 mark for 4.48 dm³. Calculation: Molar mass of N₂ = 28 g/mol. Moles = 5.6 g ÷ 28 g/mol = 0.2 mol. Volume = 0.2 mol × 22.4 dm³/mol = 4.48 dm³. A is incorrect — uses 0.1 mol instead of 0.2 mol. C is incorrect — this is the volume of 0.5 mol. D is incorrect — this is the volume of 1 mol.

Answer

4.48 dm³

Answer

22.4 dm³

Answer

11.2 dm³

Answer

2.24 dm³

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