Ответ:
СО2:
С= +4 О2= -2
Н2СО3:
Н= +1 С= +4 О3= -2
ВаСО3:
Ва=+2 С=+4 О3= -2
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Ответ:
СО2:
С= +4 О2= -2
Н2СО3:
Н= +1 С= +4 О3= -2
ВаСО3:
Ва=+2 С=+4 О3= -2