Problem: A chromium-containing compound has the formula FexCryO4 and is 28.59% oxygen by mass.Find y.

FREE Expert Solution

We’re being asked to determine the value of y in FexCryO4 where Oxygen is 28.59 %.


In the formula, there are 4 oxygen atoms, the molar mass of which is:

O4     4 x 16.00 g/mol O  = 64.00 g/mol


Since we are given the percentage of Oxygen in the compound, we can use the mass percent formula to get the molar mass of the compound.


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Problem Details

A chromium-containing compound has the formula FexCryO4 and is 28.59% oxygen by mass.

Find y.

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