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15 July, 22:33

Calculate how many grams of each product are formed when 4.05g of h2o is used. 2h2o=2h2+o2

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  1. 15 July, 22:50
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    Given dа ta:

    Mass of water used = 4.05 g

    Mass of each product produced = ?

    Solution:

    Chemical equation:

    2H₂O → 2H₂ + O₂

    Number of moles of water:

    Number of moles = mass / molar mass

    Number of moles = 4.05 g / 18 g/mol

    Number of moles = 0.225 mol

    Now we will compare the moles of water with hydrogen and oxygen.

    H₂O : H₂

    2 : 2

    0.225 : 0.225

    H₂O : O₂

    2 : 1

    0.225 : 1/2*0.225 = 0.113 mol

    Mass of hydrogen:

    Mass = number of moles * molar mass

    Mass = 0.225 * 2 g/mol

    Mass = 0.45 g

    Mass of oxygen:

    Mass = number of moles * molar mass

    Mass = 0.113 mol * 32 g/mol

    Mass = 3.616 g
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