Question

помогите по хими пожалуйста

Answer 1

CuO+H2SO4->CuSO4+H20

Fe+2HCl->FeCl2+H2

2Al+3FeSO4->Al2(SO4)3+3Fe

3Zn+2H3PO4->Zn3(PO4)2+3H2

2Ag+2HCl->2AgCl+H2

2Mn+Pb(NO3)2->2MnNO3+Pb

Ca-CaO-CaCO3-CaO-Ca

2Ca+O2->2CaO

CaO+H2CO3->CaCO3+H2O

CaCO3->CaO+CO2

2CaO->2Ca+O2

ZnSO4

w(Zn)=(65/161)×100%=40.4%

w(S)=(32/161)×100%=19.9%

w(O)=(64/161)×100%=39.7%