July 2022 1 3 Report
Укажите схемы осуществимых реакций с участием Na2CO3:

1 Na2CO3 + SiO2 → (при t)

2 Na2CO3 + H2O + CO2 →

3 Na2CO3 + Ba(NO3)2 →

4 Na2CO3 + KNO3 →
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