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# How do you calculate the relative mass of FeSO4?

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Answered May 20General

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Charlotte PerryPharmacy undergraduate at University of Nottingham. Online tutoring available! 13 students helped

Using the periodic table, you can calculate the relative formula mass. The atomic weight is the lower number on each chemical. Fe has a mass of 56, S a mass of 32 and O a mass of 16. As there are four oxygens present in this compound, you multiply 16 by 4 to get 64. Lastly you add all these separate masses together, which gives a total relative mass of 152.