Как найти массовую долю cuso4 naci h2so4 naoh

Дано
CuSO4
NaCL
H2SO4
NaOH
M(CuSO4)=63.5+32+64=159.5g/mol
W(Cu)=63.5/159.5*100=39.81%
W(S)=32/159.5*100%=20.06%
W(O)=4*16/159.5*100%=40.13%

M(NaCL)=23+35.5=58.5g/mol
W(Na)=23/58.5*100%=39.32%
W(CL)=100%-39.32%=60.68%

M(H2SO4)=1*2+32+64=98g/mol
W(H2)=1*2/98*100%=2.04%
W(S)=32/98*100%=32.65%
W(O)=4*16/98*100%=65.31%

M(NaOH)=23+16+1=40g/mol
W(Na)=23/40*100%=57.5%
W(O)=16/40*100%=40%
W(H)=1/40*100%=2.5%