Brightstorm Q & A : I was wondering if I could have any help on understanding how to do mole equations. When you did the equation with water, how did you get 1.5 mols at the end? I'm confused because I thought that once you cancel out the same unit of measure(molecules), you multiply 9.03 x 10^24 by 6.02 x 10^23 and get the answer that way. I did that on my calculator and I go 5.43606 E48. And that is DEFINITELY not what you got, so what am I doing wrong? Thanks.