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.
A chromium-containing compound has the formula FexCryO4 and is 28.59% oxygen by mass.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Empirical Formula concept. You can view video lessons to learn Empirical Formula. Or if you need more Empirical Formula practice, you can also practice Empirical Formula practice problems.