 Okay. So what does it say? It says, find the number of ions that is in 300 mls of 0.1 molar calcium chloride. Okay? So the first thing we need to know is what? Is calcium chloride going to do what? Is it a strong electrolyte or a weak electrolyte? That's the first thing you need to do. Well really, the first thing you need to ask yourself is, is a covalent or an ionic compound? Clearly it's an ionic compound, so then we can go down to the next level and say, is this a strong or a weak electrolyte, right? This is a strong electrolyte, right? So it's going to break up into its own. Is everybody okay with that? So let's just go about writing that chemical equation first. We'll do it in a little different order than we did before. So when we put calcium chloride into the water, breaks up into the calcium ion, plus it's 2-4. Everybody's okay with that, right? Okay, so now we know the volume of the solution of calcium chloride is 300 mls. And we know the polarity of it, 0.110 mole calcium chloride. Okay, so remember, molar is just another way of saying calcium chloride or one liter of solution. How much liters of solution we have while we convert to it? How many moles of calcium chloride we have in 0.3 liters of solution? We should be able to by multiplying and finding. We were looking for a number of moles of ions, right? With this, we've got now the number of moles of calcium chloride. Is everybody okay with that? We don't want that though, right? So how do we do this? We go over here and look for the conversion factor. It's a conversion factor of 1 mole of CaCl2 to 1 mole of Ca2 plus and 2 moles of Cl minus. So we add 2 plus 1 for a combined total of ions, right? It's going to be 3 moles. So that gives us a conversion factor. Moles of calcium chloride on the bottom, moles of ions on the top. Cancel. Should that give us that? Times 0.3 times 3. So 0.090 moles of ions. And if you wanted to, you could compare that to the last one, right? Of course, if you're listening to this on the video, you have no idea what we're talking about. Any questions on this one in particular? Yeah. On your mole calculation on the 0.1 over 1 meter, is that just like telling you concentration? Yeah, this is, so this is the same thing we're called as saying the polarity of the calcium chloride solution is 0.10 mole, like that. Okay. Calcium. So that's the same thing as saying this thing. Okay. Can I answer your question? Yeah. Any other questions on this? Okay.