Answer:
I think the answer should be 147
Explanation:
You need the Avogadro's number. I can't remember exactly the calculation.
The ionic compound is CaSO4
Acc. to Law of Conservation of Mass
Mass of reactants=Mass of Products
Let mass of Oxygen be x.
So,
50.6+x=452
x=452-50.6
=401.4 g
