Ask your homework questions to teachers and professors, meet other students, and be entered to win $600 or an Xbox Series X 🎉Join our Discord! Numerade Educator ### Problem 56 Hard Difficulty # Write balanced equations for each of the following by inserting the correct coefficients in the blanks:(a)$_{-}\mathrm{Cu}(s)+_{-}\mathrm{S}_{8}(s) \longrightarrow_{-}\mathrm{Cu}_{2} \mathrm{S}(s)$(b)$_{-}\mathrm{\mathrm{P}}_{4} \mathrm{O}_{10}(s)+_{-}\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow_{-}\mathrm{H}_{3} \mathrm{PO}_{4}(\mathrm{l})$(c)$_{-}\mathrm{B}_{2} \mathrm{O}_{3}(s)+_{-}\mathrm{NaOH}(a q) \longrightarrow_{-}\mathrm{Na}_{3} \mathrm{BO}_{3}(a q)+_{-}\mathrm{H}_{2} \mathrm{O}(l)$(d)$_{-}\mathrm{CH}_{3} \mathrm{NH}_{2}(g)+_{-}\mathrm{O}_{2}(g) \longrightarrow_{-}\mathrm{CO}_{2}(g)+_{-}\mathrm{H}_{2} \mathrm{O}(g)+_{-}\mathrm{N}_{2}(g)$### Answer ## a)$16 \mathrm{Cu}(\mathrm{s})+\mathrm{S}_{8}(\mathrm{s}) \longrightarrow 8 \mathrm{Cu}_{2} \mathrm{S}(\mathrm{s})$b)$\mathrm{P}_{4} \mathrm{O}_{10}(\mathrm{s})+6 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \longrightarrow 4 \mathrm{H}_{3} \mathrm{PO}_{4}(1)$c)$\mathrm{B}_{2} \mathrm{O}_{3}(\mathrm{s})+6 \mathrm{NaOH}(\mathrm{aq}) \longrightarrow 2 \mathrm{Na}_{3} \mathrm{BO}_{3}(\mathrm{aq})+3 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})$d)$4 \mathrm{CH}_{3} \mathrm{NH}_{2}(\mathrm{g})+9 \mathrm{O}_{2}(\mathrm{g}) \longrightarrow 4 \mathrm{CO}_{2}(\mathrm{g})+2 \mathrm{N}_{2}(\mathrm{g})+10 \mathrm{H}_{2} \mathrm{O}(1)\$

#### Topics

Chemical reactions and Stoichiometry

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##### Top Chemistry 101 Educators ##### Allea C.

University of Maryland - University College ##### Morgan S.

University of Kentucky ##### Jake R.

University of Toronto

### Video Transcript

So we have advanced off their chemical reaction and showing over here, so that start with the 1st 1 So we have Cooper and Sassy now sulfur and we have asked copper to solidify. Okay, so, um yeah, we have to bombs that so much. You're 11 right? At the same among off element. All right, so on the right, we have See you to ask Mom. Love you. See you and estate. Um, you can see that we have more. So for Darren Cooper. So for each sulfur on the right, we can see that off. We need to copper. So we're it off him. So therefore, we would need us. Um, Okay. First of all, our bonds of self reverse, we're left with half eight. Right? We have one so ever at eight. Even off. See you two as two bombs of sulfur and I we were ah, 16 years old corporate. You know that the bottom is the culprit. And this is his How about stats? Okay, second, um, we have people. 10 were forever And ever expect three people for so again. Ah, balance off all surfers. How we have p for 44 for so I had a four breeding farm off, actually pure for it. So, um, and then on their, um, on the right, we also have, ah force a force for So, uh, that stuff Let's start here. Okay, so for oxygen, we were half Ah, four times a week. Webb 12. So we we have traveled the germs on the love we have to It's sex. Sex in front of water in flint water. Okay, so, um, we have, ah, hundreds of being balanced. Okay, The last one will be the oxygen. So from on the right, where Force and Forward 16. And on the labrum 10 past six are from the water. So respond. So there's the bonds. The cable reaction for P. Okay, so far. See, we have beat you. All three were filming hydroxide, and that we have are so the m bromate and a fuII be awfully Any three. Be awfully. And then we will have water. Um, as the poets. Okay. So you know that the bands that I've refers up look for the suffering of our bar unversity. We have to bomb on the left. So also put two on infant ova and a Phoebe awfully. Well, I just make sure I have to Porn on the left and on the right. Okay, so the links stab is ah, for under right, we have to pull on. Right? So at the same time, we have free sodium, but we have to off them. So we have have so six sodium zero for 16 fellow sodium hydroxide. I know that the parents of sodium then us, but not Lisa. Let's check the oxygen. So we have sex sausage in over here, and then we will have six oxygen from some hydroxide and also three, um, oxygen from Bari. So the oxygen here is not the get talons. So maybe we should look at something else, so we should Ah, look, maybe look for real stuff from the hygiene First fearful hydrogen we need on their sodium hydroxide Be over your bonds of sodium on DDE all section. It will be complicated, so we'll be last longer. Hydrogen first. So for hydrogen that we also put Ah, we have 600 laps up with a three in front off water. So two parents there, Hodgins? Yes. And then the last element of ours will be ah, Austrian pure oxygen. It's how complicated be off for off the species. The counting oxygen. So you be a little bit difficult to adjust the lumber. So normally we would just start with bouncing the element that only one off them contained in the Bratton. And also one off then containing the father. So you're making the CSO were less wearable. So for oxygen we have left were six on the right. Sorry. Left. We have nine. We're free from the BP Chakothi and then six from Tau. So the drugs I and there on the right we have nine as well. So these ah is also bonds. Okay. Okay. For the last one, we have C h ri an itch to our with Austin for your C 02 and h 20 and also answer you So we start first stop buying something Ah, that we've Ah, we're gonna bounce the m and that we only can find him one off that we acted and also the only can find him one off the port. It's so right here. We are looking at large that really only can find naturally in one off the Latin and also one of the part. It okay So often The Paul side. We have to nitrogen. So we have to put two in front off. Say, free an inch to the bars and large again The next step I'm going to buyers. That which shows common again, is only one in the wet in there was the one. We're in the father. So his only comment outside and also safely manage to call in cabin. Okay, so on the love we have to see each free energy to so you're have to carbon. So I put a tube in front of it, OK? The Lexx animal I'm gonna borrow This is, uh Hodgins. So how'd you get over here? Okay, 100 on the right. We will cost one toe water because we're thio. Say free an itch too. So we have to put to you from the H 20 and the last one will be Ah, oxygen. Well, recently I chose Australia at the ambulance on the right, on our board it we have two species, I counting oxygen, so we have to adjust to rebel at the same time. We were the difficult. So that's why I live at the end. Okay. So for oxygen on the right, we will have two times to, um we're four from seal with you. And then we have two from water, and then we have 16 total. So that's why we put three new from the oxygen into bonds, it and that. University of Toronto

#### Topics

Chemical reactions and Stoichiometry

##### Top Chemistry 101 Educators ##### Allea C.

University of Maryland - University College ##### Morgan S.

University of Kentucky ##### Jake R.

University of Toronto