Ответ:
2Zn+O2=2ZnO
4Na+O2=2Na2O
2Cu+O2=2CuO
S+O2=SO2
2C2H2+5O2=4CO2+2H2O
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Ответ:
2Zn+O2=2ZnO
4Na+O2=2Na2O
2Cu+O2=2CuO
S+O2=SO2
2C2H2+5O2=4CO2+2H2O