Calculate the pH of a 3.36x10-11 M NaOH solution.

pH = (round to 3 sig figs)

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.