Question

What is the mass percentage of oxygen in Al2(so4)3.18H2O?The molar mass of this sudstance is 666.43g/mol.

Answer 1

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MOLAR MASS OF OXYGEN IS 16 GRAM / MOL




THERE ARE 30 OXYGEN MOLES INSIDE 1 MOL OF COMPOUND Al2(SO4)3.18H2O


MASS OF OXYGEN IN COMPOUND 30×6 = 480g


MASS % OF OXYGEN =

480 × 100 /666.43

72%


SO MASS PERCENTAGE OF OXYGEN IS 72% IN
Al2(SO4)3.18H2O


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