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9 March, 00:31

A compound with a formula mass of 42.08 u is found to be 85.64% carbon and 14.36% hydrogen by mass. Find its molecular formula.

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  1. 9 March, 00:38
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    Percent Mass Percent/mass lowest # #

    C 85.64 12 7.13666 / 7.1366 1

    H 14.36 1 14.36 / 7.1366 2

    CH2 this is not in its molecular formula yet the mass doesn't equal 42.08

    (CH2) 3 mass = 42

    It's molecular formula is C3H6
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