October 2021 0 11 Report
В каких уравнениях допущены ошибки в расстановке коэффициентов: а)C2H2+3O2=2СO2+2H2O
б)FeCl2+3Cl2=2FeCl3
в)4Al+302=2Al203
г)2CrCl3+Cr=3CrCl2
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