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A chemist analyzed a sample of unknown substance and found that it contains 55% carbon, 9.17% of hydrogen and the rest of the mass is oxygen. What is the percentage by mass of oxygen in the sample?
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asked
Jan 22
in
Analytical Chemistry
by
FelishaBrazi
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290
points)
A chemist analyzed a sample of unknown substance and found that it contains 55% carbon, 9.17% of hydrogen and the rest of the mass is oxygen. What is the percentage by mass of oxygen in the sample?
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Jan 22
by
MarilouBelt6
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510
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To find the percentage by mass of oxygen in the sample, we need to subtract the percentages of carbon and hydrogen from 100%.100% - 55% carbon - 9.17% hydrogen = 35.83% oxygen So, the percentage by mass of oxygen in the sample is 35.83%.
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