Calcium nitrate forms two different hydrated salts. One contains 24.7 % water and the other 30.4 % water. What are the formulas for these two hydrated salts?

Answer 1

formula for hydrated salt..

Ca(NO3)2xNH2O

so what is N?

percent water= N*molemassH20/(molmassCa(NO3)2 + molemassH2)

solve for N in each case.