Question

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Using Criss - Cross method, write the chemical formulae for the following :-
A) Ammonium phosphate B) Calcium nitrate
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Answer 1

1) ammonium phosphate 2) calcium nitrate

Explanation:

a) valency of ammonium is +1 , valency of phosphate is -3. b) valency of calcium is 2+ , valency of nitrate is 1-