Calculate the mass of iron oxide Fe3O4 in the amount of 0.35 mol.
July 24, 2021
In order to calculate the mass of iron scale Fe3O4, you need to calculate the molar mass by the formula:
M (Fe3O4) = 3Ar (Fe) + 4Ar (O);
M (Fe3O4) = 3 * 56 + 4 * 16 = 168 + 64 = 232 (g / mol);
The mass is calculated by the formula:
n = m / M hence m = M * n;
m = 232 * 0.35 = 81.2 (d);
Answer: the mass of iron oxide is 81.2 g.
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