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Chemistry
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OpenStudy (anonymous):
Will Medal And Fan A compound weighing 115 g contains 68.3 g of carbon, 13.2 g of hydrogen, 15.9 g of nitrogen, and some amount of oxygen. What is the mass percent of oxygen in the compound? 11.48% 15.30% 13.83% 13.91%
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OpenStudy (jfraser):
You know what the whole sample weighs, and you know what \(three\) of the \(four\) pieces weigh. How much does the fourth piece weigh?
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