In nature, copper has two isotopes: Cu-63 and Cu-65 with abundance 69 % and 31% respectively. Calculate the average atomic mass of copper.

Define dew point. i am writing this part to be able to ask the question

If i add water to oil what will happen

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