Предмет: Химия, автор: kkkkkkkkkk123

Даю 43 балла,химия ,9 класс

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Ответы

Автор ответа: frizon

Ответ:

1. В. Железо активнее меди.

2. Кислород и озон - аллотропные модификации одного вещества.

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