Which of the following is a property of matter?
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a. it is everywhere.
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b. it cannot be divided.
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c. it takes up space.
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d. it is constantly changing.
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Can smoke be transformed into liquid or used as energy or both?

Which substances have the lowest melting points: ionic covalent, or metallic

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.