What is the process called when water moves into the air?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Are oil and water a mixture or solution