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bio_man bio_man
wrote...
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Educator
Posts: 33329
9 years ago
A pure substance is matter that consists of matter with a composition that ________.
A) is fixed in a definite proportion at all times
B) varies according to the amount of water present
C) depends on the temperature
D) always contains oxygen
E) always contains two or more substances
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f_zah1f_zah1
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Posts: 10774
9 years ago
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