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Chemistry · Unit 1 · Chemical reactions — reactants, products and energy change · Chemical reactions

Determine the percentage composition from relative atomic masses; empirical formula of a compound from the percentage composition by mass; and molecular formula of a compound from its empirical formula and molar mass.

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Question 1

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. Determine the empirical formula of the compound.

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