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Chemistry
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OpenStudy (anonymous):
Explain why the appearance of gas is not always a sign of a chemical change
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OpenStudy (btaylor):
Because some times, a liquid boils (or a solid sublimates), which is physical change.
OpenStudy (anonymous):
simpliest example is water vapor, you cant see it on a clear day but when its fog or mist you can see it...
OpenStudy (anonymous):
THANKS! How do I pick two best answers?
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