 OK, so let's do this first example. It says, calculate the percent composition or percent weight volume of 2.00 times 10 squared milliliters solution containing 20.0 grams of sodium chloro. OK, so remember, percent weight volume was the grams of solute per the milliliters of solution. So that's what we're looking for. We're looking for the mass of the solute and grams over, so the volume per milliliters of solution to the solution. So this first one seems like it's going to come out pretty good, because we've got the solution and milliliters already, 2.00 times 10 squared mills. And then, of course, the solute in this case is going to be sodium chloride, 20.0 grams. Now remember, when we said the equation is the percent weight volume, so it's going to be the, in this case, the mass of sodium chloride in grams, which we've got over the volume of the solution by 100. All we need to do is plug those numbers in, right? We should go look at this answer. So 20.0 grams divided by 2.00 times 10 squared mill times 100%. What did you guys get? What is it? 10%, right? What is it, 10%? Is that what we would say? 10.0%, right? 10.0%. Why would we say that? Yeah, because it's a safe thing, right? So we could also say 10.0%, the proper way would be to be like a 10.0% sodium chloride solution. But of course, if you didn't put that bless, it's going to be good. OK? Did everybody cool with that one? Oh. On the arm's edge, we don't put 10.0 in the counter. 0.5 off versus 6.0, just like every other time. 0.5 off versus 6.0, just like every other time.