What volume of hydrogen would be required to produce 0.400 mole of HCl at STP?

Question

H2(g) + Cl2 (g) → 2HCl(g)

Answer 1

each mole of H2 produces two moles of HCl

moles of H2 needed ... 0.400 / 2

each mole of gas has a volume of 22.4 L

Answer 2

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