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4 November, 23:02

How many grams of water are made from the reaction of 4.0 grams of hydrogen gas with the given reaction 2H2+O2--->2H2O

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  1. 5 November, 02:48
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    The mass of water is 36 g.

    Explanation:

    Mass of hydrogen = 4 g

    Mass of water = ?

    Solution:

    First of all we will write the balance chemical equation:

    2H₂ + O₂ → 2H₂O

    Number of moles of hydrogen = mass / molar mass

    Number of moles of hydrogen = 4 g / 2 g/mol

    Number of moles of hydrogen = 2 mol

    Now we compare the moles of water with hydrogen from balance chemical equation.

    H₂ : H₂O

    2 : 2

    Mass of water = moles * molar mass

    Mass of water = 2 mol * 18 g/mol

    Mass of water = 36 g

    If the water oxygen is in excess than mass of water would be 36 g.
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