Question

Solve for the molar mass of this compound then convert 5.75g Magnesium Chlodride to MOLES. MgCl2​

Answer 1

Explanation:

So this is another yield question. Right? So they're telling us that magnesium chloride is decomposing into magnesium metal, and, um, we start with 185. Sorry, we recover 185 grams of magnesium, but we started with 100,000 grams or one kilogram, um, of magnesium chloride. Right. So you'll notice that I didn't finish the equation, right? Because I wanted to do it with you. Um, so when you have magnesium core of any metal core, when they decompose and you form the elemental metal is what we call this magnesium by itself, right? So the balance, the equation, you're always gonna make Korean gas as a product. It's not important for this, um, the math at all, But I just wanted to, uh, practice writing or predicting products. Right. So we start with 1000 grams that we give the theoretical yields so more convert when we're calculating percent yields. Right. Um, it's the actual amount that you collect, which in this case, is gonna be the 185 frames over the theoretical amount of front. That's forms based on the math that we're going to do right now, right? So 1000 grams of magnesium chloride. Right, So we're gonna go moles of magnesium chlorate. And the way that we do that is the muscular. Wait. So, based on my calculation, um, the more here wait is 95.21 grams of magnesium chloride that's gonna cancel out, right? It's a 1 to 1 ratio so we can get one mole of magnesium over one mole of magnesium chloride, and then the mass of magnesium metal will get us two grams of magnesium. So that's 24.305 If he was my desk malted Harry through this is grams of magnesium, right over one mole of magnesium. So mole is cancelled malls. It's now we're left with grams of, of, of magnesium. Um, and when you round that out to a few decimal places, you should get 255 0.28 grams. So when we calculate, the percent yields right, So the percent yields, um is going to be, ah, it says that we collected 185 grams, right? And how much is apparently made in the reaction based on our math is 255.28 grams. Remember it. So frak is a desk. Sorry. We're going to get a decimal, so we have to multiply by 100 to get the percent. And when you do that