Ответ:
Ca + 2H2O =Ca(OH)2 + H2
Ca°----- 2 ---- Ca+2 | 2 | 1
H2+1---- 2 - - - - - H°2 | 2 | 1
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Ответ:
Ca + 2H2O =Ca(OH)2 + H2
Ca°----- 2 ---- Ca+2 | 2 | 1
H2+1---- 2 - - - - - H°2 | 2 | 1