December 2021 0 21 Report
Помогите уравнять Cu + H2SO4 = CuSO4 + H2O + SO2
CaCO3 + H2SO4 = CaSO4 +H2O + CO2
Fe + H2SO4 = Fe2(SO4)3 + H2O + SO2
H2SO4 + NaOH = Na2SO4 + H2O
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