Предмет: Химия, автор: qwertyzver

помогите решить задачу. в составе оксида железа имеется 72.2% железа и 27,8% кислорода. назовите и напишите формулу данного оксида

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Автор ответа: МистерХимия

0

Fe+O2=Fe2O3 - это и есть оксид железа

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2. READING
2.1 Read the text and do the exercise below the story.
Out Shopping for Clothes
pem Oky
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*
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F
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