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Which sample of matter can be separated into two different substances by physical means?


Which sample of matter can be separated into two different substances by physical means? (1) liquid bromine (2) gaseous propane (3) solid sodium acetate (4) aqueous magnesium sulfate



Answer and explanation:

Mixtures can be separated by physical means. We are, therefore, looking for a mixture. Liquid bromine is an element. Elements can not be separated by physical or chemical means. Gaseous propane is a compound (two or more elements in fixed ratios). Compounds can be separated chemically but not physically. Solid sodium acetate is an ionic compound. Finally, aqueous magnesium sulfate is a mixture. Aqueous means something is dissolved in water. A mixture is composed of two or more substances. In this case, water and magnesium sulfate. Therefore, choice 4 is the correct answer.


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August 2022 test

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