Which of the following show evidence that a chemical reaction has taken place: 1. Two liquids are combined and a gas is released. T or F
2. A substance is added to water and it dissolves. T or F
3. Two liquids are combined a solid precipitate forms. T or F
4. A new substance is formed. T or F
5. A SINGLE reactant changes from a solid to a liquid. T or F

anybody that dose not understand they are separate answers meaning question 1 then question 2 and etc.