Photos H2S CL2 H2O

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H2s cl2 h2o. Cr2o3+h2=CR+h20. CR h2o cr2o3 h2. CR+2h=CR+h2. H2cr.
Cr2o3+h2=CR+h20. CR h2o cr2o3 h2. CR+2h=CR+h2. H2cr.

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