Question

How many oxygen atoms are present in the 278 g of hydrated ferrous sulphate

Answer 1

Answer:

4 oxygen comes from sulphate ion and 7 oxygen comes from water in hydrated ferrous sulphate solution.

Answer 2

Explanation:

FORMULA OF HYDRATED FERROUS SULPHATE IS

FeSo4 . xH2O

MOLAR MASS = 56 + 32 +4*16 + x*18

= 152 + 18x

GIVEN MASS = 278 g

152 + 18x = 278

x = 126/18 = 7

HENCE FORMULA IS

----> FeSo4. 7H20

NUMBER OF OXYGEN ATOMS = 11

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