Завдання 5. Розставте коефіцієнти в хімічних рівняннях:
K,0+ HNO,-KNO3+H,0
SiO₂+Na₂O-Na₂SiO,
Al+H2CO3=AL(CO;),+H2
FeO+HCl= FeCls+H,0
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