Question: 1. An unknown compound was analyzed and found to have the following percent composition: 38.7% C 51.6% O 9.7% H Which of the following compounds

1. An unknown compound was analyzed and found to have the following percent composition: 38.7% C 51.6% O 9.7% H

Which of the following compounds might be the correct identity of the unknown compound?

Compound Name Chemical Formula Molar Mass acetic acid C2H4O2 60.05 g/mol ethanol C2H6O 46.07 g/mol ethylene glycol ** C2H6O2 62.07 g/mol

2. Formaldehyde, acetic acid, and glyceraldehyde are three molecules that share the same empirical formula (CH2O) but have different molecular formulas. Given the following information, what are the molecular formulas of these compounds?

a. Formaldehyde molecules each contain 1 carbon atom.

b. Acetic acid has a molar mass of 60.05 g/mol.

c. Glyceraldehyde molecules each contain 6 hydrogen atoms.

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