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zubareva45

a) водород:хлор = 1:1   HCI                      H₂+CI₂=2HCI

b) железо:хлор= 1:3  FeCI₃                      2Fe+3CI₂=2FeCI₃

c) алюминий: кислород= 2:3  AI₂O₃       AI+O₂=AI₂O₃

d) цинк: кислород =2:2  ZnO                  2Zn+O₂=2ZnO

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