Problem: Acetic acid (HC2H3O2) is the active ingredient in vinegar. Calculate the mass percent composition of oxygen in acetic acid.

🤓 Based on our data, we think this question is relevant for Professor Schrock's class at UWF.

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mass percent=mass elementtotal mass of compound×100


First, we need to get the atomic weights of each element in HC2H3O2 using the periodic table and then calculate its molar mass.

molar mass H = 1.01 g/mol

molar mass C = 12.01 g/mol

molar mass O = 16.00 g/mol

molar mass HC2H3O2 = (1.01 g/mol x 4) + (12.01 g/mol x 2) + (16.00 g/mol x 2)

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Problem Details

Acetic acid (HC2H3O2) is the active ingredient in vinegar. Calculate the mass percent composition of oxygen in acetic acid.

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Our tutors have indicated that to solve this problem you will need to apply the Mass Percent Formula concept. You can view video lessons to learn Mass Percent Formula. Or if you need more Mass Percent Formula practice, you can also practice Mass Percent Formula practice problems.

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Based on our data, we think this problem is relevant for Professor Schrock's class at UWF.