7. pure water? Which of the following materials fall in the category of a “pure substance"? (a) Ice (b) Milk (c) Iron (d) Hydrochloric acid (e) Calcium oxide (f) Mercury (g) Brick (h) Wood (i) Air. on the following mixtures. .
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Pure substances are defined as substances that are made of only one type of atom or molecule.
The pure substances are:
(a) Ice
(c) Iron
(d) Hydrochloric acid
(e) Calcium oxide
(f) Mercury
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