December 2021 0 16 Report
Какое уравнение соответствует реакции замещения? 1) MgCO3 = MgO + CO2

2) NaCl + AgNO3 = NaNO3 + AgCl

3) 2Na + 2H2O = 2NaOH + H2

4) Na2CO3 + CO2 + H2O = 2NaHCO
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