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7 September, 11:59

In order to jave 2.2 moles of potassium oxide, how many grams of potassium are needed

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  1. 7 September, 13:58
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    Answer is: mass of potassium is 172.04 grams

    Balanced chemical reaction: 4K + O2 = 2K2O.

    n (K2O) = 2.2 mol.

    From chemical reaction: n (K2O) : n (K) = 2 : 4 (1 : 2).

    n (K) = 4.4 mol.

    m (K) = n (K) • M (K).

    n (K) = 4.4 mol • 39.1 g/mol.

    n (K) = 172.04 g.

    n - amount of substance.

    m - mass of substance.

    M - molar mass.
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