Write molecular formula of the following using cross multiplication method.
a) calcium chloride b) calcium sulphate
c) magnesium oxide
d) potassium dichromate
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ANSWER:-
1. Calcium chloride : CaCl2
2. calcium sulphate : CaSO4
3. Magnesium oxide : MgSO4
4. Potassium dichromate: K2Cr207
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