2Na+2H2O---->2NaOH+H2↑
Ответ:2+2+2+1=7
2Na+2H2O→2NaOH+H2 сумма буде 6
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2Na+2H2O---->2NaOH+H2↑
Ответ:2+2+2+1=7
2Na+2H2O→2NaOH+H2 сумма буде 6