Ca+P ➡️Ca5 P2
Na+H2O➡️NaOH+H2⬆️
2Fe+CI2➡️FeCI3
SO2+O2➡️SO3
NaNO3➡️NaNO2+O2⬆️
HgO➡️Hg+O2
Їх нужно уровнять​
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