Question

Which of the following are pure substances? Ice, Milk , Iron , Hcl , Brick , Mg​

Answer 1

Explanation:

Ice, iron, calcium oxide and mercury are pure substances since they contain particles of only one kind of matter. In contrast, milk, hydrochloric acid (hydrogen chloride gas dissolved in water), brick and air cannot be called pure substances because they consists of particles of more than one kind of matter.

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Answer 2

Answer:

HCl is a pure substance

Explanation:

as it has a chemical formula which can not be changed