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10 January, 17:10

Which oxide (s) of manganese have a mass percent of the metal that is greater than 50%? MnO MnO2 Mn2O3All of these210

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  1. 10 January, 18:42
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    All of these oxides of manganese have a mass percent of metal greater than 50%

    Explanation:

    Step 1: Data given

    Molar mass of Mn = 54.94 g/mol

    Molar mass of O = 16 g/mol

    Step 2: Calculate mass % of Mn in MnO

    Molar mass of MnO = 54.94 + 16 = 70.94 g/mol

    % Mn = (54.94/70.94) * 100 % = 77.45 %

    Step 3: Calculate % of Mn in MnO2

    Molar mass of MnO2 = 54.94 + 2*16 = 86.94 g/mol

    % Mn = (54.94/86.94) * 100% = 63.19 %

    Step 4: Calculate % of Mn in Mn2O3

    Molar mass of Mn2O3 = 2*54.94 + 3*16 = 157.88 g/mol

    % Mn = ((2*54.94) / 157.88) * 100 % = 69.6 %

    All of these oxides of manganese have a mass percent of metal greater than 50%
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