 OK, so let's do this question. It says calculate the maximum yield of sodium hypochloride you would get if you started with a mass of sodium hydroxide of 28.4 milligrams. So let's try to do that problem. So I know you guys don't know all of your polyatomic ions but sodium hypochloride is this thing here. That's bleach. So it's actually a good one to kind of remember since bleach is such a common household substance. But anyways, so recall, this is just like the last problem we did. In fact, it's the same reaction equation. So remember with the reaction equation it gives us that reaction equation gives us kind of a conversion factor. So in this case, what did we want to do? We wanted to convert sodium hydroxide to sodium hypochloride. So we have that mole to mole conversion. So let's just write that up here just to remind ourselves. So for every two moles of sodium hydroxide that we get, if we have a maximum yield that means 100% goes to product, we'll have one mole of the sodium hypochloride. So it's been presented with milligrams, which is a mass. But we gotta convert that to moles. And we know a mass to mole conversion, which is called the molar mass, right? But the mass that the molar mass gives us is in grams, right? So we're gonna have to convert milligrams to grams prior to using the molar mass conversion, okay? So and we, here I shouldn't have erased it, but we wrote down the molar mass for sodium hydroxide last time, it was 40.00. So one thing I am going to ask you, does anybody remember the conversion factor between milligrams and grams? I'm 1000 milligrams per gram. Yeah, 1000 milligrams per gram. If you don't remember that, something you're supposed to remember, not gonna be given to you. And I'm just gonna use sodium hydroxide there as a placeholder because we're going to convert from the sodium hydroxide to the sodium hydroxide. Remember we want to do moles because we need to use that mole to mole conversion, right? So we're gonna have to use the molar mass of sodium hydroxide. So on the bottom, 40.00 grams of sodium hydroxide on the top, one mole of sodium hydroxide. That's gonna cancel out grams of sodium hydroxide there. Now we have moles of sodium hydroxide, but we wanted grams of sodium hypochloride, right? So we've gotta figure out the number of moles of sodium hypochloride first. So we've got this conversion factor here, which is two moles of sodium hydroxide to one mole of sodium, okay? So that's gonna cancel there. Remember when we're talking about that maximum yield that's implying you want the weight, okay? So we're going to have to figure out something that converts moles of sodium hypochloride to grams of sodium hypochloride. Of course we all know that's the molar mass by now, right? But we haven't figured it out for sodium hypochloride yet. So let's just write down the units. And then we'll figure out the number of cells. Okay? So I'm just going to do this on the calculator. If you're having trouble figuring out molar mass, please again go back to the molar mass videos. So molar mass of sodium hypochloride has been 22.99 plus 16 plus 35. 74.44 grams per mole. So hopefully I'm moving on to the same answer. So that goes here. So all we do is just go across, divide the things. So 28.4 divided by 1,000, divide that by 40, divide that by two, and then multiply that by 74.44. And well this is in grams. Why don't we convert that to milligrams, okay? So we'll get a number that is a little more presentable. Okay, so let's just convert it to milligrams for fun. So one gram of sodium hypochloride is 1,000 milligrams. I'm going to take that number and multiply it by 1,000. And I get a number. Okay, again it didn't tell me to put it in milligrams or grams for that matter. So I could have chosen whichever one I wanted. But I think this is an easier number to just look at and understand with those units. So I kind of like to do appropriate units. It wouldn't have been incorrect if you put 2.64 times 10 to the negative two grams, okay? So there was one other thing I wanted to say about this. Now I'm not remembering. Remember, oh, maximum yield, right? 100% of reactant goes to product. Okay, that's what maximum yield. 80% yield, yeah, you would take this as 100% yield and multiply that by 0.8, okay? I mean we could do a formal count. That's like the short way, you know? Yeah, yeah, yeah, so what we're going to do to the next problem is to do a percent yield problem, okay? Where I can actually show you to cancel out with units, you know, but effectively, yeah, you're just going to multiply both points, okay? Well, how would you figure out the percent yield if you weren't given the percent yield? So they would have to give you the number of moles or the mass of the product too, okay? Any other questions? Those are all good questions.