Can you help me to answer this pleases

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.