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27 July, 13:41

For this reaction: 3 KClO3 to 3 KCL + 4 O2, How many miles of potassium chloride are needed to produce 13 grams of oxygen?

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  1. 27 July, 16:24
    0
    Moles of potassium chloride = 0.3 mol

    Explanation:

    Given dа ta:

    Number of moles of potassium chloride needed = ?

    Mass of oxygen produced = 13 g

    Solution:

    Chemical equation:

    2KClO₃ → 2KCl + 3O₂

    Number of moles of oxygen:

    Number of moles = mass / molar mass

    Number of moles = 13 g / 32 g/mol

    Number of moles = 0.41 mol

    Now we will compare the moles of oxygen with potassium chloride.

    O₂ : KCl

    3 : 2

    0.41 : 2/3*0.41 = 0.3

    So number of moles of potassium chloride produced would be 0.3 moles.

    Mass of potassium chloride:

    Mass = number of moles * molar mass

    Mass = 0.3 mol * 74.55 g/mol

    Mass = 22.4 g
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