CuO and CuCl2 are solids but different composition.
Water, H2O, and ethanol, C2H5OH are different compounds but they are liquids, boil at 100 C or below, dissolve many of the same things, don't dissolve many of the same things, etc.
What does it mean when they say materials with the same properties but with different chemical composition? Can you give examples so that I can fully understand?
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