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29 March, 11:41

Al2 (CrO4) 3 percentage of Al

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  1. 29 March, 12:41
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    13.4%

    Explanation:

    Take the molar mass (26.98) of Al x 2 because there are 2 moles in the given compound. Divide this number by the total molar mass of the compound (401.9) this gives you. 134. To get a percentage mulitply by 100 for 13.4%.

    [ (26.98 x 2) / 401.9] x 100 = 13.4
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