Question

Помогите срочно , даю все балы 40

Answer 1

№1

FeО, Fe2O3, Cl2O7, K2O, CО2, N2O5, NO2

№2

4FeO+3O2=>2Fe2O3

2N2+5O2=>2N2O5

C+O2=>CO2

Na2O+H2O=>2NaOH

2Cu+O2=>2CuO

4P+5O2=>2P2O5

№3

2Ba+O2=>2BaO

2Zn+O2=>2ZnO

4Fe+3O2=>2Fe2O3

2S+3O2=>2SO3

4Li+O2=>2Li2O

2Ca+O2=>2CaO

4B+3O2=>2B2O3

C+O2=>CO2

№4

Mr(H2SO4)=2×1+32+16×4=2+32+64=98 г

Mr(Mg(NO3)2)=24+2×(14+16×3)=24+2×(14+48)=24+2×62=24+124=148 г