PLZ HELP!!! Of the four examples listed below, which describe a chemical change?
I. Boiling water and producing water vapor
II. Freezing liquid water into ice cubes
III. Mixing salt into a beaker of water until the salt dissolves
IV. Mixing hydrogen gas and oxygen gas together to make liquid water
When a chemical change occurs something new is formed. The reactants have different properties than the products. The product cannot easily be separated into its original parts.
