1.

Calculate the percentage composition of calcium nitrate.

Answer»

SOLUTION :The FORMULA of calcium nitrate is `Ca(NO_(3))_(2)`.
Thus, the formula mass or molecular mass
=At. Mass of Ca+2 X at. Mass of N+6X at. Mass of oxygen.
`=40+2xx14+6xx16=164`
% of `Ca=(40)/(164)xx100=24`
% of `N=(28)/(164)xx100=17`
% of `O=100-(24+17)=59`


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