Quantitative aspects of Chemical Change Stoichiometry Introduction

[@missmartinsmathsscience]

My apologies everyone at 13:56 I made a mistake because I took the Atomic mass number for sulfur to be 12 but that is TOTALLY the Atomic mass number for Carbon 👀😢 my humblest apologies! ❤️ The molar mass (M) for MgSO4 is therefore 120 (NOT 100). As a result the number of mols (n) is 0,083333 mols. As a result when you use the next formula, big N (number of MgSO4 molecules) will be 5,0166666 x 10^22 (to the power of 22). Therefore the number of oxygen atoms will be 5,0166666 x 10^22 x 4 which is equal to 2,01 x 10^23 oxygen atoms. So the method still stays exactly the same ❤ please learn from my silly mistake and never assume you know the Atomic mass, always look it up on the periodic table to make 100% certain 🎉❤

[@tlotlo235]

Mam why is the big N of MgSO4 5, 0166666 ×10^22 whereas in the calculator is 4,9966×10^23 giving me the final answer of 1, 99864×10^23 after multiplying by 4?❤

[@iloveintersteallarha4664]

samee thing with my calculator did u figure out what you did wrong ? @@tlotlo235

[@AndiswaMazongolo-q9w]

Thank you so much ❤

[@brianmusekwa3682]

Thanks to u ma'am I'm to write with understanding

[@phologokekana1019]

​@@tlotlo235 I had a similar problem,so your not supposed to round off Ur (n) number of moles, when U are doing your calculations

[@BoipeloMmatlwa]

Mami u are definitely underrated 😢u are the best teacher in physics❤we appreciate your efforts

[@simomoses-le2cg]

Criminally underrated

[@SbahleDube]

And you just restored my hope in ever understanding quantitative aspects of chemical change, the thing literally made my life difficult in chemistry last year. Thank you so much, you're highly appreciated🩶🙏🏼

[@missmartinsmathsscience]

I'm so glad! :D I will be posting a lot more on this topic in term 3!

[@isabellaaiken7469]

I really appreciate you ma'am.Sending my love from the Eastern Cape❤May God continue to bless you and your family abundantly.

[@Ltg-c9r]

One of the best physics teacher

[@missmartinsmathsscience]

Thank you!

[@tshiamotladi7349]

I'm writing a test today and this helped me to understand the formulas thank you so much

[@missmartinsmathsscience]

I am so glad that it helped!

[@RelebohileThapeli]

🥺thank you mam, just when I thought I was gonna leave out the question regarding this topic because I didn't understand😊 ❤you're indeed a life saver🎉

[@missmartinsmathsscience]

Such a big pleasure! I am so happy to help you ace your exams

[@nkaDnD]

Watching this video exactly a year later ❤😂

[@blessing7294]

Not me actually enjoying chemistry rn 🤣🤣 Thank you so much mam, may God continue to bless you, and Thank you for today's lesson ❤️💯

[@robertsechele438]

Thank you ma’am you really clarified this topic for me because I was totally lost in class ❤

[@missmartinsmathsscience]

Such a pleasure :)

[@SharonSithole-l5b]

Thank you so much. I was a bit worried about this topic but now I am actually a enjoying it and will definitely keep following for more .😊👌

[@missmartinsmathsscience]

Glad it was helpful! :D

[@classydisplays]

I'm an A student but recently I skipped one class of physics this helped me catch up tsm ❤

[@Reez_Thomas]

Awesome job! Keep it up

[@AndiswaMazongolo-q9w]

Hy mama thank you so much on the example using the formula n=N÷NA you wrote that the molar mass of MgSO4 is equal to 100 how? Plz help me mam

[@mandisiyaca4235]

mistake, it should be 120g.mol-1

[@tutoringwithshane]

Hi mam i think you made a mistake somewhere by 14:00 because sulfur is 32??

[@missmartinsmathsscience]

Please see my pinned comment ❤

[@Speedster_gt]

I hope you find out how to put your videos in playlists, so they are easier to find.

[@missmartinsmathsscience]

My videos are in playlists

[@MajokAkolBol]

thank you so much Madam I'm understanding the formula now.

[@sandyabrahams2892]

Thank you mam,I couldn't be more grateful❤❤❤

[@vloggervibez9317]

Ma'am when I divide 0.2 and 22.4 it gives me a different answer that is in scientific notation

[@jennife._rr]

Same

[@Precious.K.1]

Same .

[@Callmechelseaa27]

Hiii Maam do you mind doing a video on water of crystallization grade 10

[@joshuaaugust5647]

I strongly agree =

[@missmartinsmathsscience]

Yes I do!

[@igdaiz]

Thanks for the lesson ❤❤❤ it helped a lot

[@MercyMapuranga-ny1ev]

what a life saver ,you deserve more to life than this ,thank you ma'am ,from witbank

[@BrendaMthembu-wj7tn]

18:49 you can use both formulae

[@c.smusiq]

made a mistake its S WHICH IS 32

[@missmartinsmathsscience]

Please see my pinned comment about this.

[@MasiiwaMuringani]

Thank you so much for the help mam❤ 🎉

[@missmartinsmathsscience]

My pleasure 😊

[@LethaboDitlhokwe]

I might be a bit late but how is the molar mass of Sulfur 12 ?

[@missmartinsmathsscience]

I wrote a pinned comment correcting myself

[@MahlodiMasehela]

I think you made a mistake where you said atomic mass of sulfate was 12

[@missmartinsmathsscience]

I know I did mention this in my pinned comment

[@caydiess]

Thank you so much for all these videos😭🫶🏻 i feel super confident!

[@missmartinsmathsscience]

You got this! I believe in you :D

[@mbekademase4199]

Is it possible to write our answers in scientific notation.

[@NamoliNtuli]

Wow thank you mam!!🥺❤️you the best🧸

[@Excelsiussten]

Can i get an activity about stoichiometry only for practice 😢

[@mbongenipshange4414]

From Avogadro's number 6.022 ×10 what if it's 2 mol does Avogadro's Number Change?

[@chulumancomakalima7884]

Mam Sulphur is 32 and you wrote 12 so i think your anwere at 15:35 is wrong

[@missmartinsmathsscience]

Hello please see my pinned comment. I addressed this shortly after I filmed the video

[@chulumancomakalima7884]

@@missmartinsmathsscience i saw it thank you so much

[@vloggervibez9317]

May you please do past papers in this topic please❤

[@vloggervibez9317]

For grade 10

[@JusticeM-d6g]

How did you get Na

[@YamkelaMadikizela-nm8ig]

Mam how come your sulfer's atomic no is 12 but mine is 32

[@missmartinsmathsscience]

Please read my pinned comment

[@NATHASHAPalesa]

Okyy why you say 100 in the molar mass

[@phindilemalevu1262]

Forever wena miss❤❤❤

[@bigsistershelpinghand1279]

thank you so much!!

[@missmartinsmathsscience]

My pleasure 💛

[@mulondololo9297]

Thank you mam❤❤

[@missmartinsmathsscience]

Most welcome 😊

[@vutlharimbhiza1115]

Thank you so much

[@StudDrip-x3m]

Im still abit confused😅 but i understand way better then class😅

[@missmartinsmathsscience]

What can I still help with? I have smaller videos that go over each formula in more detail. Check out the playlist :D

[@UB-SSHORTS]

You are helping me so much mam 🫶

[@DerickJnr]

22:44 there is a mistake

[@missmartinsmathsscience]

There is no mistake at that time.

[@ShivastiSingh]

​@@missmartinsmathsscience0.2÷ 22.4 = 8.91×10^-3 when I entered it in the calculator..what do I do?

[@williamhachem4033]

@@ShivastiSinghwhat?

[@vloggervibez9317]

​@@ShivastiSinghI got the same answer

[@HopeliciousSingasi]

Sulphur is 32 not 12

[@missmartinsmathsscience]

Please read my pinned comment.

[@infinitygamer9128]

i commented yayyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!

[@emmanueltshimomola5703]

Thank soo much ❤🎉🎉❤😊

[@missmartinsmathsscience]

🩷🩷🩷

[@Excelsiussten]

Thank gof 😂i was going to ask wat happened buh i understand mistakes happens

[@QuintonD2006]

Suiiiii

[@ThandekaMahlangu-fs1tx]

Your students are lucky.🥹🥹🥹