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Question

A compound with molar mass 90g/mol is known to contain 26.66% carbon, 2.22% hydrogen and 71.12% oxygen. Find the molecular of this compound.

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Solution

Consider 90 gm of compound,

carbon = 90×26.66100=24gm=2mol

Hydrogen = 90×2.22100=2gm=2mol

Oxygen = 90×71.22100=69gm=1mol

Molecular formula = C2H2O4

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