c)Calculate the percentage composition in calcium nitrate. [Ca-40, N= 14,0-16]
Answers
Answer:
Hint: The ratio of amount of each element present in a compound, to total amount of individual elements present in the compound multiplied by 100 is called the percentage composition of that particular element.
Complete step by step solution:
The formula of Calcium nitrate is Ca(NO3)2
.
So, total molecular mass of the compound is given as = Atomic mass Ca + (Atomic mass of N + Atomic mass ofO3)× 2
= 40 + [ 2×7 + 16×6]
The formula of Calcium nitrate is Ca(NO3)2
= 150
The formula to calculate percentage composition of individual element is
%X=Mass of XTotal molecular mass of compound×100
So, we calculate the % of Ca as-
%Ca=Mass of CaTotal molecular mass of compound×100
%Ca=40150×100
= 26.6
For Nitrogen, %N=14150×100=9.33
For Oxygen, %O=96150×100=64
So, in Calcium nitrate - Calcium is 26.6%, Nitrogen is 9.33% and Oxygen is 64%.