Ответ:
S+O2=So2
4p+5o2=2p2o5
c2h4+3o2=2co2+2h2o
2c2h2+5o2=4co2+2h20
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Ответ:
S+O2=So2
4p+5o2=2p2o5
c2h4+3o2=2co2+2h2o
2c2h2+5o2=4co2+2h20