Which of the following is true of pure substances and mixtures? (check all that apply.) pure substances are made up of mixtures. pure substances are separated by physical means. mixtures can be separated by physical means. a pure substance is heterogeneous. a mixture is made of one substance. mixtures are made up of more than one component.
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Which of the following is true of pure substances and mixtures? (check all that apply.) pure subst...
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