 OK, so I guess let's try this one. Are the two solutions 0.9% NACL? Or you could think of that as 0.15 molar NACL. And 0.15 molar glucose isotonic? So that's the first question in this one. So we've got to figure out, are these two solutions isotonic? So the first thing you've got to do is calculate the osmolarity of these two solutions. So since they're both given in molarity or molar units, we could easily calculate the osmolarity using those units. So we have to remember that NACL solid is the combined molarity of the products, or the combined molarity of the ions in solution, or what is dissolved in solution. So let's go ahead and figure out the osmolarity. So the osmolarity of the particles in this solution are molar. And we say, well, in the products, there's two particles, so it's a 1 to 1 to 1 ratio. But if you add them both up, it's 2. So we're going to multiply this by 1 molar NACL to 2 molar R. And that will give us the osmolarity. I'm going to cancel, cancel. So 0.15 times 2, 0.30 molar, or osmolarity in particles. So that's for the osmolarity of the NACL solution. Does that make sense? OK, so let's do the osmolarity for the glucose solution. So the glucose is also 1.5 molar. But whereas NACL is an ionic compound, glucose is a covalent compound. So it doesn't break into ions when it's dissolved into water. OK, so the equation for that would be glucose solid. Because the glucose, here you've got a 1 to 1 ratio of reactants to products. So if we look at this, we'll do. So we can make a basis particles. So we've got 1 molar or glucose. We want to get familiar with this. So the molar glucose cancels out. And we get 0.1 of this equation. And now what you want to ask yourself is which one is more concentrated than the other one? Are these two concentrations the same? Well, they're not the same. Because we've got one that's 0.3 and the other one that's 0.15. So this one's more concentrated than this one. So are they isotonic? No, they're not isotonic. OK, so which one's hyperatomic and which one's hypotonic? Hyperatomic means more. So this one's hyperatomic. This one's hypotonic. This hypo means less. Does that make sense? Yeah.