Question

NaClОбчисліть масову частку сполуки:СРОЧНО!!!
H2О
Li2O
Fe2O3
HNo3
NaCl

Answer 1

1)NaCL
W(Na)=Ar(Na) / M(NaCL) *100% =23/58.5* 100=39.32%
W(CL)=100%-39.32%=60.68%
2)H2O
W(H2)=Ar(H2) / M(H2O) * 100%=2/18 * 100%=11.11%
W(O)=100%-11.11%=88.89%
3) Li2O
W(Li)=7*2/30*100%=46.67%
W(O)=100%-46.67%=53.33%
4)Fe2O3
 W(Fe)=2*56/160*100%=70%
W(O)=3*16/160*100%=30%
5) HNO3
W(H)=1/63*100%=1.59%
W(N)=14/63*100%=22.22%
W(O)=3*16/63*100%=76.19%