October 2021 1 1 Report
Помогите с химией пожалуйста...

Формулы оксида, кислоты, соли соответственно:

1) BaO, Fe(OH)2, NaNO3.
2) SiO2, CaO, K2CO3.
3) P2O5, HCl, CaCl2.
4) SO3, P2O3, Ca(OH)2.
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