Photos K O2

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K o2. K2cr2o7 h2. K2cr2o7 h2so4 = k2cro4. K2cr2o7 h2so4 конц. K2o+h2so4.
K2cr2o7 h2. K2cr2o7 h2so4 = k2cro4. K2cr2o7 h2so4 конц. K2o+h2so4.

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