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8 November, 14:01

What is the value of n when the empirical formula is c3h5 and the molecular mass is 205.4?

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  1. 8 November, 17:53
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    Empirical formula is the simplest ratio of whole numbers of components in a compound.

    the empirical formula - C₃H₅

    mass of empirical formula - (12 g/mol x 3) + (1 g/mol x 5) = 41 g

    we have to find how many empirical units make up the molecular formula

    number of empirical units = molecular mass / mass of empirical formula

    empirical units = 205.4 g/mol / 41 g = 5.00

    molecular formula - n (C₃H₅)

    n - number of empirical units

    therefore n = 5
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