Question

A compound with the empirical formula of CH2 was found to have a molar mass of approximately 84g.what is the molecular formula of this compound?
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Answer 1

Divide the molar mass of the compound by the empirical formula mass. The result should be a whole number or very close to a whole number. Multiply all the subscripts in the empirical formula by the whole number found in step 2. The result is the molecular formula.