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Question		Answer
CrO start learning		czarny
cr2o3 start learning		zielony
CuO start learning		czarny
MnO start learning		zielony
Cu2O start learning		ceglastoczerwony
CrO3 start learning		czerwony
MnO2 start learning		MnO2brunatny
Fe2O3 start learning		czerwonobrunatny
Fe3O4 start learning		czarny
FeO start learning		czarny

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