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3 December, 08:51

If you burn 53.8 g of hydrogen and produce 481 g of water, how much oxygen reacted?

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  1. 3 December, 10:13
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    The reaction:

    2 H 2 + O 2 → 2 H 2 O

    2 Hydrogen molecules react with 1 Oxygen molecule to create 2 molecules of water.

    We have to convert 53.8 g of Hydrogen into moles:

    53.8 : 2.02 g / moles = 26.63 moles

    2 moles H 2 ↔ 1 mole O 2

    26.63 moles H 2 ↔ 13.32 moles O 2

    Mass (O 2) = 13.32 moles · 32 g/moles = 426.2 g

    Answer: 426.2 grams of Oxygen.
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