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Which sample of matter is classified as a substance? (1) air (3) milk(2) ammonia (4) seawater

Megan Page

in Chemistry

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Jessie Thompson on December 22, 2018

A chemical substance that has the characteristics that cannot be separated by physical methods. The sea water and the milk can be separated by sedimentation, and the air has different components, in function of other aspects (such as elevation). Only the ammonia is a substance. (so you can have a formula: NH3)


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