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Metallic iron can be made by the electrolysis of molten Fe2O3.(a) What mass of Fe is formed by passing a current of 5.98 Athrough molten Fe2O3 for 4.40 days? The un...

Question

Metallic iron can be made by the electrolysis of molten Fe2O3.(a) What mass of Fe is formed by passing a current of 5.98 Athrough molten Fe2O3 for 4.40 days? The unbalanced chemicalreaction representing this electrolysis is shown below. Fe2O3 Fe +O2____________ g of Fe is formed by thiselectrolysis.(b) How many minutes are needed to plate out 15.00 gof Fe frommolten Fe2O3 using 5.58 Acurrent?___________ minutes ar

Metallic iron can be made by the electrolysis of molten Fe2O3. (a) What mass of Fe is formed by passing a current of 5.98 A through molten Fe2O3 for 4.40 days? The unbalanced chemical reaction representing this electrolysis is shown below. Fe2O3 Fe + O2 ____________ g of Fe is formed by this electrolysis. (b) How many minutes are needed to plate out 15.00 g of Fe from molten Fe2O3 using 5.58 A current? ___________ minutes are needed.



Answers

Metallic magnesium can be made by the electrolysis of molten MgCl. (a) What mass of Mg is formed by passing a current of 4.55 A through molten MgCl $_{2},$ for 4.50 days? (b) How many minutes are needed to plate out 25.00 $\mathrm{g} \mathrm{Mg}$ from molten $\mathrm{MgCl}_{2}$ using 3.50 $\mathrm{A}$ of current?

Problem 92 columns. Calls to and Beard. Second scenes this is to electron reduction production. Each mole of magnesium solid requires so in party in body Be given that 4.55 M pierre of current. So poor point pipe five mps. Multiply by time and we need to time converting them seconds. So given time is 4.50 day. Now we need to convert in ours. So multiply. Converse infected 20 hour for one day. Multiply by converting conversion factored 60 minute per hour. You need to convert after multiplying this conversion, I'm converted a minute. Now we need to convert in second summer to play against 60 second but one minute. No again we need to convert you know, one column for NPR 2nd. So we multiply conversion factor one column poor one MB it second. Now we need to convert enough Berardi. So again we multiply conversion factor one Friday but 96 four 85 Cool. Um now we need to convert enough moles of magnesium so we can multiply Conversion factor one mole magnesium poor to friday. No, this is the mood. So so we need to calculate the molds of magnesium required so we can multiply it. Bye bye. Molecular mass and molecular mass of magnesium is 24.31 graham magnesium. But mole of magnesium are pretty calculating we get two 33 graham magnesium. So this is the mass of magnesium formed by passing a current of 4.55 mps through a molten mg cl two for 4.50 days. This is final answer for part. Now, in part b in part of it, given that given a question how many, sorry, we need to calculate how many minutes are needed to plate. It played out 25 grand magnesium from Malton mg cl two using 3.50 And beer up Grant. So given that 25 point 00 g magnesium first, we need to convert in most. So we divide by its high molecular mass molecular mass of magnesium is 24.31 ground magnesium caramel. Now we need to convert in them Faraday. So we need we multiply it by convergent factor to Ferrari Part of one mole magnesium. Now we need to convert. Need to eat converting a column. So again we multiply another conversion factor that is 96 485 colon perforated. Again we need to convert in ampere per second. So another conversion factor is one and your second parque colon. Now we need to convert in a minute So we can multiply another conversion factor that is one minute For 60 seconds. Now we need to convert in minute. So here this is an empty this quantity an mp here so we need to convert in 11 minutes. So we again multiply one another conversion factor that is for current. You can multiply one for 3.50 and beer after calculating we get 9 45 I mean, this is time required. This is 9:45 minutes. This is the time required to plate it. Our 25 grand magnesium from Malton MG cL two using 3.50 emperor current. So this is our final answer pod, uh

Well here we are given information about specific chemical reaction. In this case we have magnetite yielding alumina and iron. And we have that The heat of reaction is negative, 3350 killer jewels per mole of reaction to the standard way of the death defining this. So we're given information that we have 26 points 27.6 g of aluminum and 68 9.1 12 g of magnetite. So we in this case we have to see whether or not we have a limiting re agent. So the molar mass of aluminum is about 27 g. So in this case we have the number of moles of aluminum is equivalent to 1.2 moles. But since we need eight moles of aluminum for one bowl of this, one mole of this reaction to occur, we can divide this by eight and we see that this is about 0.128 moles. So for our other compound here or magnetite, we have a molar mass of 231.5 g per remote. So the number of moles is 0.29 88 months. In this case we need three moles per reaction to occur. So we divide by three and this is equivalent to 0.995 moles. So we find that essentially aluminium in this case is our excess re agent. So the excess aluminum will not be performing a reaction to the excess aluminum won't be contributing to releasing heat. So in this case only the magnetite is going to be contributing to releasing the heat. So we're given information that delta H not equals negative, 3350 killed jules. And this occurs for three moles of magnetite. But in this case, since we only have zero point 298 moles of magnetite, mhm. We're in here, we're just going to plug in the total number of moles. This coefficient here is going to adjust for that. So 0.298 moles of magnetite and total cancels out with the moles of magnetite so we can substitute everything in to see how much he is released. And we find that the amount of heat released about negative 333 killer goals. And this is our final answer.

Hello friends in this video with alone hard to do so starts geometric calculations. So as you can see, you have been given a chemical equation in front off you, in which iron three oxide is reacting with carbon monoxide to give Ireland on carbon dioxide. Okay, so in this, that's what we have to start to questions. And this or the first question is we have to find out the maximum mass off Ireland. Maximum mass off irony produced using four for before Graham's Off Island three oxide. Okay. And the next question Benito answer, is the mass off carbon monoxide produced mass off carbon monoxide produced, not produce, required. So massive carbon monoxide required massive carbon monoxide required to react with 4 54 grams off iron. Three oxide, right? So it's simple. So there are two questions We have been given an equation. We need to find out what is the maximum mass off island, which is produced when we used 4 54 grams off island three oxide. And also we have to find out what is the mass of carbon monoxide required to react with fourth of before Graham's off every wall tree. Okay, so before we go ahead, we can just stick with. There are equation is balanced or not, So we can see here There are two atoms off Iran on the reaction site on two atoms off. I don't on the correct size as well. Then there are six atoms of oxygen on the react inside and six atoms off oxygen on leopard upside. Then three atoms of carbon under react inside and three atoms of carbon on the correct side. So this equation is perfectly balanced. Now, the next step producers, we have to find the molar masses off all the compounds here. Right? So how do we find the molar masses? So we can refer to the periodic table cedar, the mass off each of the we can check them ourselves, one of them off each element. And then we put added up. So, for example, so I don't oxide is to indo the atomic mass off ironist 56 a little bit too in 2 56 plus three into 16 because the atomic mass of oxygen ist 16. Rachel, this will give us toe molar mass off island three oxide. So if we do this, it comes out to 1 60 grams per moon so similarly began out of four carbon monoxide as well. So carbon monoxide comes to 28 grams for more and ironist 56 grams on government oxide. Carbon dioxide is four p four grams. Okay, so you can see the coefficients here. So it means Didn't the reaction three multiplied or three moles of carbon monoxide is used up. So basically three into 28 grams off carbon monoxide, less used up similarly to multiple 56 grams off ironist produced also three multiply by 44 grams off carbon dioxide is produced, right? So let's get the final calculation here. So 1 60 gram off every two or three is reacting with three in 28. So that's calculate what is three into 28. So three multiplied by 28 which is 84. So it reacts with 84 grams off carbon Morneau oxide. Okay. And then it reacts with 50. It produces 56 grams off it produces 56 into 2 56 into two s. 112 Right. So it produces 112 grams off iron. 112 grams off item. Okay. And then And then we have to. We get three multiplied by four before Graham's off. Carbon dioxide is a three. Multiply before before Gramps off topping dioxide. So 13 to graham off carbon. Right? So the simple So what? What has happened here? 1 60 gram off island three oxide reacts with 84 gram off carbon monoxide and gives 112 gram off Iran. And with her, Liza 1 32 grams off carbon dioxide. Okay, so but this basis, basically, we can try to solve our two questions. Okay, So our first question is, we have to do it. Remind the mass off island off pain from 4 54 gram off Ireland. Three oxide. So from the abo calculation, we come to know that 1 60 gram off island three oxide gives 112 gram off I'll right? So now we have been given 4 54 grams off island three oxide. So let's assume it produces a gram off iron. So how do we care? FedEx We don't cross multiplication, so X becomes 112 multiplied by 4 54 divided by 1 60 So let's do the calculation using a calculator. So it's 112 multiplied by 454 divided by 1 60 Right. So it comes out to be 317 grams off. I'd run. Okay, so this will be down. So for the first question, so the question waas massive are not central 4 54 grams off a feat war tree. So dance arrest 317 grams off. I'll Okay, so let's go towards the be part of the question in the be part of the question we need to do to mine. What is the Mars off? Carbon monoxide required to react with 4 54 rounds off island three oxide. Right. So as we did the calculation before become to know that 1 60 gram off iron, three oxide, 1 60 gram off iron, three oxide. React with it before Brahmos carbon monoxide. Okay, so we can take this of the reference fall RB. But so 1 60 gram off 1 60 gram off island. Three oxide reacts with it before graham's off. Carbon monoxide. Now we have 4 54 grams sauce. I didn't three oxide. All right, so let's as you the amount off carbon dioxide, carbon monoxide, which is which is reacting with the 40 people gram of every toward race. Why, Gramps? So why will be it before my reply by 4 54 divided by 1 60 So 84 multiplied by 4 54 Divided by 1 60 So let's do the calculation now using a calculator. So 84 multiplied by 4 54 divided by 1 60 So it gives to 38.35 grams off garden with bauxite. I hope you understand. Thank you so much.


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