Plzz answerr just number 4 in symbols

List four observations that indicate that a chemical reaction may be taking place

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point

What are the two basic types of satellites