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10 May, 21:28

A compound has an empirical formula of AB and a molar mass of 90 g/mol. What is its

molecular formula? (Molar mass of AB = 30 g/mol)

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Answers (1)
  1. 10 May, 22:08
    0
    A3B3

    Explanation:

    Molecular formula = n x empirical formula

    (AB) n = 90

    MM of AB = 30 g/mol

    30n = 90

    Divide both side by the coefficient n i. e 30

    n = 90/30 = 3

    Molecular formula = n x empirical formula

    Molecular formula = n x (AB)

    Molecular formula = 3 (AB) = A3B3
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