The mass of a hydrogen atom is approximately 1.67 x 10^-24 g, and that of an oxygen atom is approximately 2.66 x 10^-23 g.
3.1. Determine the mass of a water molecule that is made up of two hydrogen atoms and one oxygen atom.
3.2. Calculate how many molecules there are in a gram of water.
(The mass of a water molecule is 2.994×10^-23 grams,im just having problems with the second one)