Question

which of following cannot be classified as a pure substance​

Answer 1

Answer:

Explanation:

Of the four items – table salt, nitrogen, air, and gold, - c.air cannot be classified as a substance. In particular, air cannot be classified as a “pure substance” because it is a homogenous mixture of different elements or substances while table salt, nitrogen, and gold can be considered as substance due to their basic chemical properties.

Answer 2

Answer:

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