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5 November, 16:15

An early method of producing hydrogen gas was passing steam through red-hot iron pipes according to the reaction

3 Fe (s) + 4 H2O (g) → Fe3O4 (g) + 4 H2 (g)

How many liters of hydrogen gas at STP can be created by reacting 15.3 g of iron?

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  1. 5 November, 16:33
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    Answer;

    = 8.1536 Liters

    Explanation;

    Moles = mass/R. A. M

    Moles of Iron = 15.3 g / 56 g/mol

    = 0.273 moles

    For every three moles of Iron used, 4 moles of Hydrogen are produced.

    Therefore;

    Moles of Hydrogen = (0.273/3) * 4

    = 0.364 moles

    But 1 mole of a gas occupies 22.4 liters at STP

    Thus;

    Volume of Hydrogen = 0.364 * 22.4 l

    = 8.1536 Liters
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