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Ethane has molecular formula C2H6. What is the percent composition of carbon and hydrogen in ethane? Round the molar mass of carbon to 12 g/mol and the molar mass of hydrogen to 1.0 g/mol.
A. 60.% carbon and 40.% hydrogen
B. 65.% carbon and 35.% hydrogen
C. 70.% carbon and 30.% hydrogen
D. 75.% carbon and 25.% hydrogen
E. 80.% carbon and 20.% hydrogen
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