Предмет: Химия, автор: alinka1kartinka

раставить каффициенты
HgO-Hg+O
Ca+O-CaO
Na+O-NaO
H+O-HO
индексы
HgO-Hg+O2 ) ВСЕ 2 ЕТО ИНДЕКСЫ
Ca+O2-CaO
Na+O2-Na2O
H2+O2-H2O

Ответы

Автор ответа: Nataliboe

2

1) 2HgO = 2Hg + O2
2) 2Ca + O2 = 2CaO
3) 4Na + O2 = 2Na2O
4) 2H2 + O2 = 2H2O

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