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26 June, 13:48

1. One of the substances in a new alkaline battery is composed of 63.0% manganese and 37.0% oxygen by mass. Determine the empirical formula of the compound in the battery.

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  1. 26 June, 13:50
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    Divide each % value by respective atomic mass

    Mn = 63.0/54.94 = 1.1467

    O = 37/16 = 2.3125

    Divide by smaller value

    Mn = 1

    O = 2.3125/1.1467 = 2 Empirical formula = MnO2
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