September 2021 0 21 Report
Расшифруйте цепочку превращений и определите загаданные соединения, если известно, что вещество В не горит в кислороде. Использовать следующие соединения:
CaO
H2O2
Cl2
Ca
H2
O2
CaCl2
Ca(OH)2
H2O
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