August 2022 1 1 Report
какие из реакций являются экзотермическими А)H2 + Cl2 = 2HCl + 184 кДж Б)H2 + Br2 - 71 кДж = 2HBr В)3Fe + 2O2 - 1118 кДж = Fe3O4 Г)CaCO3 + 180 кДж = CaO + CO2
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