Step 1: 5.89% H, 70.6% C, and 23.5% O by mass. Recall that mass percent is given by:
Assuming we have 100 g of the compound, this means we have 5.89 g C, 70.6 g C, and 23.5 g O.
An elemental analysis of the acid indicates that it is composed of 5.89% H, 70.6% C, and 23.5% O by mass. What is its molecular formula? The molecular mass is 136 g/mol.
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