Ask your homework questions to teachers and professors, meet other students, and be entered to win $600 or an Xbox Series X 🎉Join our Discord! Numerade Educator ### Problem 96 Hard Difficulty # Sodium borohydride (NaBH_ ) is used industrially in many organic syntheses. One way to prepare it is by reacting sodium hydride with gaseous diborane$\left(\mathrm{B}_{2} \mathrm{H}_{6}\right) .$Assuming an 88.5$\%$yield, how many grams of$\mathrm{NaBH}_{4}$can be prepared by reacting 7.98$\mathrm{g}$of sodium hydride and 8.16$\mathrm{g}$of diborane? ### Answer ##$\mathrm{m}\left(\mathrm{NaBH}_{4}\right)=11,15 \mathrm{g}\$

#### Topics

Chemical reactions and Stoichiometry

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### Video Transcript

So the, um, citizens of silly emperor of or high dry? Ah, it is done by reacting. Sodium hydride will be to a six if we have this reaction. Ah, we have 7.90 graham off. So that has Ryan also reform with sex Graham off up to accept h six and also the percentage you will be 88.5%. So, what will be the master of sodium porterhouse? European Proteus. India's were for this worship. Okay, again. First of all, we have ah, chemical reaction. We have the bonds that so we have. Ah, too boring. So we make sure we should put two in front ofa an A B H for Touma. Sure, we have the same, um, number off authority. Also, we have to put two in front off. Ah, sodium hydride. You know that you have the same amount of sodium. Okay, so on the writer we have some the unborn balance are we just need to check if the hundreds bonds. So we have 200 forms from Hydra. I am so excited from B to a six. So it would be our eight on the left and also H on the right. So this is a chemical reaction response. The lift service. We're going to convert off the information for civil masculine promo. So the number most O n a. H. We have a 7.9 eights divided by the total mass of any H. So we're 23 plus one, so we we have cereal 0.43 to grab. Okay, so, uh, not the same thing for pre Trish Ah h six. So we have to Bull run. We have six hydra agent, we will have Ciro 0.295 Uh, most Ah, yeah, I mean most not Graham. So it should be most Okay, So again, we have to filed ah, limiting regions. And so we want to We at with off the end eight h sodium hydride. So what would be the lumber off? More, man, be to anything like that. We need that. We need the way. So is 2 to 1 to two. One. So we just take our number most off some hydro idea. Why bites you and then we will find out your mother too. We have with all off the sodium hydride, we need syrup on 166 mole off me to x x six. And you can see that we have dream or where we have to see her 60.295 Therefore, our any h is a limiting we agent limiting we a tree. So we're going to just number more off our any h two found the corresponding s o the Emperor Hydra. How many number Move. Spring produce. Okay. So you can see that the way show is to to to just 1 to 1. So we still have three single point. Ah, flee. Flee to most off an A B H four. Okay, so we're going to cover that too. Ah, Massoud. Same 0.332 times. Ah, Foster mother mass off on a beach for And a B it's for. And then we should be able to find as wealthy. Ah, around 12.6 square. And from here, we assumed that is 12% because we have, ah, percentages. 80.5%. So we're going to Mumbai that this mass by, um, 88.5% and then we should be able to find as a secret security 11.1 graham and his course morning to 88.5 percent issue

University of Toronto

#### Topics

Chemical reactions and Stoichiometry