Предмет: Химия, автор: mixaulbu

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Автор ответа: Daniilvolkswagen12

1

Ответ:
48 грамм O2.

Объяснение:
2H2O->2H2+O2 M(H2O)=18г/моль M(O2)=32г/моль Из 2*18г 32г кислорода, а из 54г-. Х=54*32/2*18=48г кислорода.

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