PLEASE HELP!! Poh of 2.17 show work

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What is the molar mass of potassium nitrate, kno3