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Chemistry 13 Online
Cthoma7501:

Which of the following is not a phase change? melting of snow evaporation of water from the ocean condensation of water vapor to form clouds hydrogen and oxygen gas combining to form water vapor

Vocaloid:

a phase change is a process by which a substance changes its state of matter (solid, liquid, gas, etc) but still retains the same chemical composition. that being said, which one do you think doesn't fit this description?

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