A compound that contains carbon, hydrogen and oxygen has a mass of 180.12 g. It was found to contain 72.00 g of carbon, 12.12 g of hydrogen, and 96.00 g of oxygen. What is the mass percent of carbon in the compound?
This question is simply asking for you to find the percentage of carbon in the compound.
You are given the molar mass of a compound: 180.12g/mol
You are given the mass of carbon in one mole of that compound: 72.00g/mol
To find the mass percent of carbon in the mystery compound, you simply divide the mass of carbon by the mass of the compound and multiply by 100:
[(72.00g C/mol) / (180.12g mystery compound / mol)] * 100 = 39.973% == 40.0% Carbon
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