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15-02-2017
Chemistry

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Determine the mass of oxygen in a 7.2- g sample of A l 2 (S O 4 ) 3 .

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Hansaja Hansaja

18-02-2017

molar mass of A l 2 (S O 4 ) 3 = 342.15 g/mol
7.2g/ 342.15 g/mol
you can get number of moles.
then multiply that by12

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