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What is the mass percent of oxygen in water, to two decimals?
A11.18%
B94.12%
C88.79%
D50.00%
Answer & Solution
Correct answer: C. 88.79%
Oxygen contributes 16.00 of 18.02 g per mole, so 16.00 / 18.02 x 100 = 88.79 percent.
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