Q. 203.7( 3 Votes )

Work out the formulae for the following compounds:

(a) Sodium oxide

(b) Calcium carbonate

Answer :

(a) The valency of sodium is 1 and that of oxide is -2. So according to the valencies of both the elements, the formula becomes Na2O.

(b) The valency of calcium is 2 and that of carbonate is -2. So according to the valencies of both the elements, the formula becomes CaCO3.


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