AP Chemistry
1.3 Elemental Composition of Pure Substances
1.1 Moles and Molar Mass
A \(3.00\text{ g}\) sample of a pure organic compound containing only carbon, hydrogen, and oxygen is completely combusted in excess oxygen gas, producing \(4.40\text{ g}\) of \(\text{CO}_2\text{(g)}\) and \(1.80\text{ g}\) of \(\text{H}_2\text{O(g)}\). What is the percent by mass of oxygen in the original compound?
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