Question

Hey mate I have done this answer but it is half I don't know how to find % of this question
a) find the percentage composition of water of crystallization in washing soda if [Na- 23, C-12,O- 16,H-1]
Answer
RMM of washingsoda ( 2×23)+12+(3×16) +(10×2)+(10×16)

=>46+12+48+20+160

=>58+68+160

=> 286
Percantage how to find please find percentage of water

Answer 1

molecular mass of water of crystallization =10.2+10.16=180
percentage of water of crystallization
=180/286 into 100= 62.93%