RO3
Mr(RO3)=40*2=80
R+48=80
R=32 R-S SO3
W(S)=n*Ar(S)*100/Mr(SO3)
W(S)=33*100/80=60\%
Ответ:
1) 2Cu+O2=2CuO
2) CuO+H2SO4=CuSO4+H2O
3) CuSO4+2NaOH=Cu(OH)2↓ +Na2SO4
4) Cu(OH)2=CuO+H2O (при нагреве)
5) CuO+H2=Cu+H2O
Объяснение:
все объяснения в реакциях
2C+O2-->2CO
2CO+O2-->2CO2
CO2+H2O-->H2CO3
H2CO3+CaO-->CaCO3+H2O
CACO3-->CaO+CO2
CaO+H2SO4-->CaSO4+H2O
hfgk;lk;
hgjjjjjjjjjjjjjjjjjjjjjjjjjjjjjggggggggggggggggggggggggggggggggg