What volume will 0.5 g of H2 occupy at s.t.p? [H = 1; 1 mole of a gas occupy 22.4 dm3 at s.t.p.]

What volume will 0.5 g of H₂ occupy at s.t.p? [H = 1; 1 mole of a gas occupy 22.4 dm³ at s.t.p.]

A 2.24 dm³
B 5.60dm³
C 11.20dm³
D 44.80dm³

waec 2007 chemistry

The correct answer is B. 5.60dm³

No explanation given

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