Предмет: Химия, автор: CassyBelka

Помогите, пожалуйста, решить химию 10 класс! Даю 50 баллов! Быстрее!

Приложения:

CassyBelka: Цепочку не надо :3

Ответы

Автор ответа: Ineedhelp5

Второе задание не очень понял
В первом умножил на 5, т.к кислорода в воздухе 20%

Приложения:

CassyBelka: Огромное тебе спасибо!!!! Спаситель!:3 Заслуженные 50 баллов!

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