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wlad13 [49]
3 years ago
15

Which statements below are an appropriate hypothesis in response to this question? Check all that apply. If a substance changes

state of matter (e.g., liquid to gas), then this is a physical change because the original properties of the substance have not changed. If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed. If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed. If a precipitate is formed when two substances are mixed, then a chemical change has taken place because precipitates are new substances.
Chemistry
2 answers:
Nostrana [21]3 years ago
6 0

Answer:

If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed.

If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed.

Explanation:

So in shorter words its options 2 and 3

Fofino [41]3 years ago
6 0

Answer: 2 and 3 are correct

Explanation:

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ppm = mg/kg, μg/g, μg/mL → These are the units

ppb = ng/g

ppt = pg/g

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