What is the molecular formula of a compound that weighs 46 g/mol and analyzes to 52.2% C, 34.8% O, and 13% H?

Question

Quizplus · Accepted Answer

The molecular formula C₂H₆O corresponds to ethanol or dimethyl ether, which has a molar mass of 46 g/mol. The percentages given can be converted to moles by assuming a 100 g sample, leading to about 2 moles of carbon (12 g/mol), 6 moles of hydrogen (1 g/mol), and 1 mole of oxygen (16 g/mol), fitting the formula C₂H₆O.

What Is the Molecular Formula of a Compound That Weighs