Answer:
1.00 moles
Step-by-step explanation:
Find the molar mass of FeSO4. Add the atomic masses (AMU) of each atom present from the periodic table..
1 Fe = 55.84
1 S = 32.1
4 O = 64
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Total = 151.9 AMU for FeSO4
This is also the same number for the molar mass of FeSO4, but just expressed as grams/mole. It takes 151.9 grams of FeSO4 to have 1 mole of FeSO4 molecules.
The problem states that 152 grams are present. To obtain moles FeSO4, divide by the molar mass:
(152 grams FeSO4)/(151.9 grams/mole FeSO4) = 1.00 moles of FeSO4
[Note that the grams cancel and moles moves to the top in the division]