 Let's try this problem. It says Titanium dioxide the substance used as pigment in white paint is prepared industrially by reaction of titanium for chloride with oxygen at high temperature So it gives you the reaction there, and then it says how many kilograms of titanium dioxide can be prepared from 5.60 kilograms of titanium for chloride, okay so How do we figure this out? Well, we're going to have to do a number of calculations and remember a number of conversion factors, okay? so one of the conversion factors already we need to know is The conversion between kilograms and grams. Okay, do you remember that one? 1,000 Grams equals one kilogram Okay, so if you don't remember those you're gonna Make sure you don't buy the test tomorrow So five point six zero kilograms of titanium chloride, okay, so What other conversion factors are we going to need to know well let's just go through this problem and see What conversion factors only know so we're eventually looking for the mass the mass titanium Anyway, I have to start with this five point six zero kilograms of Titanium for So let's just convert that to grams so one kilogram of titanium for chloride 1,000 grams So we can cancel out kilogram Okay, so now we're in grams of titanium for chloride, but that's not what we want We want the mass in kilograms of titanium dioxide, okay, so Do we know a conversion factor that will convert grams of titanium for chloride to titanium oxide? Well, it won't you do need the molar mass, but it's not going to convert from Titanium chloride to titanium oxide It's going to convert from grams of titanium for chloride to grams of or to moles of titanium for Okay, so down here. We're going to want something that's grams of titanium for And like you said up here one mole Titanium for core so whatever that is. That's the molar mass, okay, so We've got to figure out. Well, what's the molar mass of titanium for quite so look at your other people three five point four five times plus titanium 47.8 in So that equals 189.68 grams per mole of titanium for the titanium for So we'll put that down here 189.68 It's grams per mole See that So that cancels grams out and now we have moles of titanium for four Okay, is there a mole-to-mole ratio that you can that you can figure out for titanium for chloride to titanium oxide? Do you remember what we used for that one? How to convert moles of titanium for chloride to titanium oxide? We've got to use the reaction equation here. Okay, so the coefficients of the reaction equation tell us How to do that? So how many titanium for chlorides is this this coefficient telling us we have? One, okay, so and how many titanium oxides? So in this case it's one mole to one mole So we're gonna go one mole So that's where you get that conversion factor from the reaction equation that has to be balanced Okay, so cancel cancel Is that what we're looking for moles of titanium oxide? Mass So is that mass? Okay, so how do we get from moles back to mass? How did we go from? mass to moles before So use the molar mass 32 because that's two oxygens plus 47.88 so the titanium oxides molar mass 79.88 grams per mole one mole titanium oxide 79.88 But I wanted the maths and kilograms is that kilograms? So how do we convert grams to kilograms? So how many? There's no reason to guess about this stuff, okay, we've already written all the things down and up here So now all we have to do Okay, so how many sig figs is our final answer going to be? Really? In three because that's the number that was given to us in the problem So 5.6 times 1,000 divided by 1 89.68 times 1 times 79.88 divided by 1,000 and the three sig figs I get 2.36 kilograms So that's how you would do that If you started with 5.60 kilograms and it all went to the product questions on this