What is the mass percentage of Oxygen in Ethanol (C₂H₅OH)? (Ar: C=12, H=1, O=16)
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13.0%
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32.5%
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34.8%
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52.2%
📝 Detailed explanation
Molar mass of C₂H₅OH = (2*12) + (6*1) + 16 = 46 g/mol. %O = (16 / 46) * 100 = 34.78%.
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