<span>2AgNO3+ZnCl2=2AgCl+Zn(NO3)2
Mr(ZnCl)=65+35.5*2=136
Mr(AgCl)=(107+35.5)*2=285
102.5/136=x/285=>x=214.8 грамм</span>
Mr(H4P2O7)=4+62+112=178
w(H)=4:178=0,02*100\%=2\%
w(P)=62:178=0,35*100\%=35\%
w(O)=112:178=0,63*100\%=63\%
3HNO3 + Fe(OH)3 = Fe(NO3)3 + 3H2O
HNO3 + Fe(OH)3 = Fe(OH)2NO3 + H2O
2HNO3 + Fe(OH)3 = FeOH(NO3)2 + 2H2O