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Which of the following things are pure substances?
(a) Ice, (b) Milk, (C) Iron, (d) Hydrochloric Acid, (e) Calcium oxide, (f) Mercury, (g) Brick, (h) Wood, (i) Air.
(a) Ice, (c) Iron, (d) Hydrochloric acid, (e) Calcium oxide, (f) Mercury are pure substances
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