What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
Question
What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
Solution
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First, calculate the molar mass of the empirical formula (C2H5). The atomic mass of Carbon (C) is approximately 12.01 g/mol and Hydrogen (H) is approximately 1.01 g/mol. So, the molar mass of C2H5 is (212.01 g/mol) + (51.01 g/mol) = 29.05 g/mol.
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Next, divide the molecular molar mass by the empirical formula molar mass. 58.14 g/mol ÷ 29.05 g/mol = 2.
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Multiply the empirical formula by this number to get the molecular formula. In this case, the molecular formula is 2*(C2H5) = C4H10.
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