Предмет: Химия, автор: makaroncikponcik

Помогите срочно по химии дам 26 баллов ​

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Ответы

Автор ответа: fotoex
1

Ответ:

Цифры перед формулой вещества - коэффициенты (обычного размера, на строчке), цифры после или внутри - индексы (маленькие, под строчкой)

Объяснение:

2Ca + O2 = 2 CaO

3Fe + 2O2 = Fe3O4

2CH4 = C2H2 + 3H2

2Al + 3S = Al2S3

2HCl + Fe = FeCl2 + H2

2Fe(OH)3 = Fe2O3 + 3H2O

6HCl + 2Al = 2AlCl3 + 3H2

P2O5 + 3K2O = 2K3PO4

makaroncikponcik: спасибо
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