Problem: The elements X and Y form a compound that is 40% X and 60% Y by mass. The atomic mass of X is twice that of Y.What is the empirical formula of the compound?

FREE Expert Solution

Assume the molar mass of X to be 100 g/mol and the mass of the sample is 100 g.

Hence the moles of X and Y are:

mol X=40 g X(1 mol X100 g X)=0.40 mol X

mol Y=60 g Y(1 mol Y50 g Y)=1.20 mol Y

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Problem Details

The elements X and Y form a compound that is 40% X and 60% Y by mass. The atomic mass of X is twice that of Y.

What is the empirical formula of the compound?

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