Why do chemical compounds dissolve more quickly in hot solvent than in cold solvent?

How to convert a density of 0.791g/cm3 to lb/ft3

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth