What is the percent composition of nitrogen for #Sr(NO_3)_2#?
The molecular weight of Sr(NO3)2 is 211.62 gm
Atomic weight of Nitrogen is 14.0067 gm
Since there is two atoms of Nitrogen in Sr(NO3)2
Therefore total Nitrogen is
Since 28.0134 gm Nitrogen is in 211.62 gm Sr(NO3)2
Hence what is for per 100 gm [ percent] of Sr(NO3)2
Hence Answer is 13.237 %