01.04.2022

7. Розставте коефіцієнти в хімічних рівняннях: а) Na + O2 Na2O б) HgO Hg + O2 в) KClO3 KCl + O2

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7. Розставте коефіцієнти в хімічних рівняннях: а) Na + O2 Na2O б) HgO Hg + O2 в) KClO3 KCl + O2

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а) 4Na + O2=2Na2O б)2HgO=2Hg + O2 в) 2KClO3=2KCl + 3O2

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