Calculate the amount of substance that is 40 kg of ferrous sulfate 3.

univerkov | April 30, 2021 | education

According to the SI system, the mass is calculated in grams:
40kg = 40,000g.
Ferrous sulfate (3): Fe2 (SO4) 3.
The amount of a substance is found by dividing the mass of a substance by its molar mass.
Let’s calculate the molar mass of iron sulfate according to the periodic table: 2 * 56 + 3 (32 + 4 * 16) = 112 + 288 = 400.
We find the amount of ferrous sulfate substance: 40,000 / 400 = 100 mol – the answer.

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