 So this one says a 250-mil sample of a solution contains 0.134 moles of sodium. Calculate the molarity of the solution. Do you guys think you can do that one? I have to after this, right? Okay, so what do we have given to us in this problem? The volume, right? So is the volume in liters? No, so we're gonna have to convert it to liters. What is the volume that's given to us? 250, right? But there's no decimal point there, so we got to kind of watch our signal, okay? And it's in mil. So why don't we just go ahead and convert that to liters already? How do we do that? Moles of Y, by what? What's on top here? One liter, and what's bottom? 1,000 mils, right? Why? Why is the mils on the bottom? Because we want to cancel them out, right? And we want to get liters, right? Makes sense now, huh? What's that number? Two five, right? You don't have to put that zero there, okay? Letters. So very good. And we also have the number of moles, right? So what is that? Four moles. How long is fairly straightforward? The only thing we really needed to do was convert that mil liters to liters, and then just do our problem, right? So what is molarity is number of moles per liters of solution, right? Do we have both of those things? Yes. So what are we going to put on top here? 0.134 moles, right? And on the bottom, 0.25 liters, 4 divided by 0.25. I want you guys to get it. 0.54, right? Why would it be that? Two safe things. Remember, molar safe things, guys. Chapter one stuff. I think it was the first thing we looked at. Molar means moles per liter, okay? So whenever you see this, you can put that instead of, okay? Does that make sense? Just like whenever you see that instead of putting all of that stuff, right? You can put that little thing instead of putting all of that stuff, okay? Does that make sense? Okay. Any other questions on that? Okay, good.