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18 July, 09:13

A compound has empirical formula CH2O and formula mass 120.10 amu. What is the molecular formula of the compound?

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  1. 18 July, 09:34
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    The mass of the empirical formula, CH2O, is calculated below.

    mass (e. f) = 12.01 + 2 x 1.01 + 16 = 30.3 amu

    Then, divide the given formula mass by the one calculated above,

    n = 120.10 amu / 30.03 amu ≈ 4

    Thus, the molecular formula is C4H8O4.
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