In each question how is the mass number related to the sum of mass numbers

What is the solubility of substance?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

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