Ответ:
1 Mr (SO2) = 2*16 + 32 = 64;
Mr (SO3) = 3*16 + 32 = 80;
Mr (Al2O3) = 3*16 + 2*27 = 102;
2. 3H2 + N2 = 2NH3;
O2 + 2H2O + 4NO2 = 4HNO3;
3 Ca + 2H3PO4 = Ca3(PO4)2 + 3H2;
2H2O = 2H2 + O2;
3. N2O , Cu2O , CuO , NO2 , MnO2
4. CrO , Cr2O3 , SO2 , Al2O3
5. w = n*Ar/Mr w(O) = 4*16/158*100% = 41%
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Ответ:
1 Mr (SO2) = 2*16 + 32 = 64;
Mr (SO3) = 3*16 + 32 = 80;
Mr (Al2O3) = 3*16 + 2*27 = 102;
2. 3H2 + N2 = 2NH3;
O2 + 2H2O + 4NO2 = 4HNO3;
3 Ca + 2H3PO4 = Ca3(PO4)2 + 3H2;
2H2O = 2H2 + O2;
3. N2O , Cu2O , CuO , NO2 , MnO2
4. CrO , Cr2O3 , SO2 , Al2O3
5. w = n*Ar/Mr w(O) = 4*16/158*100% = 41%