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24 March, 01:20

Assume the atomic mass of element x is 22.99 amu. A 22.42 g sample of x combines with 34.56 g of another element y to form a compound xy. Calculate the atomic mass of y

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  1. 24 March, 02:11
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    The formula of the compound is xy.

    This means that one mol of x combines with one mol of y. The proportion is 1:1

    The number of moles in 22.42 g of x is equal to this weight divided by its atomic mass: # moles of x = 22.42 g / 22. 99 g/mol = 0.975207

    Then the number of moles of y is the same and you can calculate the atomic mass by dividing the mass by the number of moles:

    aomic mass = weight in grams / # of moles = 34.56 g / 0.975207 mol = 35.44 g/mol = 35.44 amu.
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