Can you be a little bit more specific like continental plates?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

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.

What is the value of keq for the reaction expressed in scientific notation?