Solving for Percent Abundance with Isotopes: Chemistry Sample Problem

[@calvinmlambo]

From South Africa 🇿🇦 this video really helped me understand the concept of isotopes and reletive aomic masses

[@johanneskomane16]

Thanks a lot, this is exactly what I needed.

[@mymabbos]

Aree You On The Paaath To Ultimate Life Success? twitter.com/3b71570548a9d6abe/status/804630629388152832 Solving for Peeeerceent Abundance with Isotopes Chemistry Sample Problem

[@mariannunga6592]

THANK U SO MUCH ISA KANG MALAKING TULONG SA NGA ESTUDYANTENG NASA BINGIT NA NG KAMATAYAN DAHEL SA CHEMISTRY :)

[@larryholey9007]

teacher said id pass if i could answer question like this. Thanks saved my life lol

[@dessy.filmss1027]

Amazing video, exactly what I needed for my chemistry homework problem. Thank u sm

[@ZaneeraA]

literally, saved my life!! Thank you so much!

[@Fatima-k]

Thank you so much, this is clear & concise, exactly what I was looking for

[@rhenielalampayan751]

where did you get the 0.09978?

[@davidhill8163]

Thanks so much for this, just what I was looking for.

[@joshsweig6656]

Thanks for the help! Finally understand this concept.

[@julianchang1665]

man saved my grade THANK YOU

[@mattwolkiewicz6479]

Can you explain to me 0.09978=0.998x? What did you do to get this?

[@HotPie4Breakfst]

because he rounded up

[@ikilledyourgin281]

@@HotPie4Breakfst rounded up what??

[@chemistryrussell]

@@ikilledyourgin281 It came after the distribution part. When he combined like terms. Adding the x terms together and then, getting the x term by itself by either adding or subtracting the numerical term from both sides. Then it is just simply division to solve for x. Hope this helped.

[@rafiultamim]

How do you obtain those numbers from combining like terms?

[@HTXLemarc]

you probably don't need this anymore, but he added the terms that didn't have an x, and subtracted them from both sides

[@diegolopez8562]

@@HTXLemarc thank you

[@tkery47]

yo this was mad clutch yo

[@MuntyaPangcoga]

Huhu i dont understand were u get 21.01

[@MaiChaMH]

Is it possible to calculate it without any percentage given?

[@arcthechef]

Thanks I don't think we see this in grade 11 but I wanted to make sure

[@dxrlpz]

i am grd 11 student and we are using this right now

[@shivagp9923]

Super helpful, thanks! :D

[@cate4084]

Thank you...that helped a lot😊

[@toddholmes594]

Great video

[@rhenielalampayan751]

where did you get the 21.01%?

[@ilovepotatoes9016]

100% - 78.99% = 21.01%

[@stephanieford2719]

where does 5 5 5 and 1 come from

[@benaustin5485]

Bit late but he was just explaining the whole concept in an extremely simplified version just to help everyone understand what we're doing algebraically

[@aruytpadyugf]

My Prof used this EXACT problem on the final. She must of copied it from this youtube video

[@christen-leebezuidenhout]

Sorry but where did you get the "0.09978" ??

[@christen-leebezuidenhout]

this was at 5:37

[@alepatalc9414]

@@christen-leebezuidenhout Did you figure this out? Pretty sure he did it wrong. I got x= 14.5% and y=6.5%

[@temia8712]

Thanks a lot!

[@ANGELOCHLOEPALER]

maybe stick to a decimal if 5 decimals then 5 decimals if 3 decimals then 3 decimals no?

[@cherylbalgos4232]

Can you make it clear? Sorry to say this, you didn't clearly show how you solve the problem.

[@safesoundequine8511]

Thank you so much

[@marionyah5548]

I can't seem to get the right answer, can you help me? Problem #3a: A sample of naturally occurring silicon consists Si-28 (amu = 27.9769), Si-29 (amu = 28.9765) and Si-30 (amu = 29.9738). If the atomic mass of silicon is 28.0855 and the natural abundance of Si-29 is 4.67%, what are the natural abundances of Si-28 and Si-30?

[@saadaks5606]

Mario Nyah the result will be: Si-28= 92.23% // Si-30= 3.1%

[@jasthenebeancae.briones8847]

Thanks a lot

[@shaikhaahmad3754]

thank you☺

[@elyzanicoledeguzman7480]

THANK YOU!!

[@asuramaru291]

8 years late but, thanks

[@aroojshahid5658]

where did this 21.01% come from?

[@saadaks5606]

Arooj Shahid 100-78.99=21.01 // we know a percentage of one of the isotopes.. so logically since it's out of 100% the result of subtracting 78.99 from 100 will be the percentage of both two isotopes (x+y=21.01)

[@Not_Experience]

saada ks why was I’m not thinking that thanks

[@ryanyang747]

saved my grade

[@massir7769]

Thanks!

[@ahmetm.4648]

thanks

[@soumiksaha8484]

🙏 Thanks a lot

[@nosleepdelirium1214]

BEST

[@clementinehonyini6189]

thankx a lottt

[@lazsa3433]

You made more confused. The numbers are too big and confusing

[@rigosilva3612]

This was not helpful at all

[@livb1657]

ily

[@camdenjames596]

Absolutely terrible video. You do a sub-par job at explaining the specific of the equations, and I am left more confused at the end than I was at the start. This video was posted by one of my teachers as a resource, and I am disappointed in the quality of the material.

[@jolene7695]

Thanks so much!

[@joryayi1189]

thanks