 Okay, so let's try this one. Determine the auspillarity of a 5.0 times 10 to the negative 4th molar potassium nitrate solution, okay? So the first thing you got to remember, this is why we learned how to do these ionic equations a while ago. So we've got to write the equation first. So potassium nitrate, when you put it into water, goes to potassium ions in this solution, and 5.0 times 10 to the negative 4th molar nitrate ions in this solution, okay? But the auspillarity is the combined of all of the particles that are in solution, okay? So this is not in solution, right? Because we can tell by the state of matter. It says it's a solid. So if it's a solid, it's not in solution. But this is aqueous, so that's in solution. And this is aqueous, that's in solution. So the auspillarity only cares that this particle is in solution, okay? So it says this particle and this particle it treats as the same type of particle, okay? So instead of having a one to one to one ratio, we have a one to two ratio, okay? Because there's two products here, okay? So to figure this auspillarity problem out, what's the auspillarity of this solution? Well, we've got 5.0 times 10 to the negative 4th molar. And we multiply that with the number of particles actually in solution, okay? So we've got two, two. And we can say osmolar or whatever you like, okay? So I was using this to denote auspillarity, okay? Per one molar helps you, you can say particle. Cancel your units now, like this, let's do it. Two osmolar particles at a time, this will be twice that amount, right? So five, three, or in the book it'll just write molar, okay? So I'd be happy with either osmolar or molar for your units in that problem.