If you change the state of something, say, liquid to solid, is it a physical or chemical change?

Chemistry

2 answers:

Georgia [21]3 years ago

4 0

I believe that it is a chemical change.

kramer3 years ago

4 0

It's a physical change.

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Is helium a metal, non metal or metalloid?

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Answer: 3 Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same

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To find the empirical formula you would first need to find the moles of each element:

58.8g/ 12.0g = 4.9 mol C

9.9g/ 1.0g = 9.9 mol H

31.4g/ 16.0g = 1.96 O

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So the empirical formula is C5H12O2.

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4 years ago