Thanks that helped some, and ive been trying to backwards work the equation. Based on the test questions the answer is 2.0x10^13
The only way I can obtain that actuall answer is to make the equation.
3.2x10^-6 / 1.6x10^19 = 2.0x10^13
Is this pure chance or is there some step im not quite geting that allows for the units to change from positive to negative?