I am so incredibly grateful for this series of videos, how can I express my thanks? I need to pass chemistry and am struggling at age 46; I never took it in high school. Today I begin watching your entire series so I can fill in the gaps in my learning -- maybe the pieces will fall into place! Thank you so, so much!
KhanAcademy is the best, Ive been out of school 10 years and just jumped into a biomedical science degree without any chemistry knowledge...they don't teach you crap in college, haha everything I know at this point, is thanks to Khan. I love it
You really blew my mind with the hydrogen = 1 proton. I managed to get a 5 in AP biology, and I understood most the concepts except little details like the splitting of water in photosynthesis. Watching your videos allows me to understand chemistry, which I never did due to a bad teacher, and string together all these pieces of information I have floating around in my head! Thanks so much for taking the time and effort to make these videos!
I go to the Maine School of Science and Math and Sal is officially way better than any of my teachers and his videos have saved my school life many times :)
i would just like to say thank you for your hard work. if you ever read this i hope you know that I really mean whay i am saying. this must take hours and hours putting these together so i really appreciate it
@dxStevenS Ur not alone with chem teachers that teach chaotically. It's hard to point out why it's a crazy class. I like Khan a lot. I watched his videos for DE and am just starting my chem classes. He's very methodical and thorough.
I always say that a teacher is the most important job ever. Because without people to teach us stuff, our society would be an under educated anarchy. But you, you don't ask for anything in return. you don't ask for money to watch these videos or anything like that. So i just wanna say thank you!
What you do is amazing! I have found some of these relevant chemistry videos very very helpful. I learn more in 15minutes than i do in a class where we cover the same thing in 50 and i still dont understand it. Anyways what would be GREAT is if you could have a team that agrees with doing things for free so there could be a much wider useful youtube channel/s of knollege. What you do is brilliant BUT you need a TEAM! Teams get more done! Keep up all the good work
our chem teacher sux and screams at us if we didnt know what he means, so we dont ask him anything and we get low grades, this helped me out throughout the years :D thnx
hey sal if you get the time could you make a video about Types of Reactions In these questions we are given the products or reactants and we are supposed to identify the results after a reaction. thanks
At 6:17, I believe he meant to say "for every 6 carbons, there are 12 hydrogen and 6 oxygens"...he said 1 oxygen. Regardless, thank you for ALL you videos...calculus, physics, chemistry...all are very helpful and most importantly easy to understand!
hey Sal! i think u explain really well but can u explain empirical formula in detail like from what it is to how to write it (also do u use the crisscross method to solve it??) plz reply asap!
Thank you! I think i 'd better self-studying and watch youtube for the learning of chemistry instead of pay all the attention in school that i dont really understand,
So calcium(if it was in a very solid state like copper or iron is) is a better conductor than copper or iron, right? Because it's more electropositive...
When you are calculating the percent of each element in a molecule, wouldn't you find it through dividing by the mass of the whole molecule (so in the water example you would divide 1.00amu of hydrogen into the 17.00amu of the water molecule)?
@bodetcorreya YESS i completely agree, i have 4 teachers for chemistry and they all suck, they're just more worried about challenging us making the class almost impossible to pass, im really having a hard time understanding everything. thats why im always on here searching and teaching myself cause i dnt get them... its people like this guy that explain things so simply that i feel like theres hope for me in passing.lol im relieved!! Thank you for posting :) i still hate chemistry tho..
I knew someone who used to spend all day every day doing something with molecular structure, and he used to boast that nobody - not even his supervisor - knew what he was doing. I thought 'Great. I wish MY supervisor didn't know what I was doing, so she would have to trust me.' The kind of supervisor I have, knowing something she didn't would be a good thing since I would get even more respect from her. He created new drugs for heart disease and he was a doctor.
I've been a big fan of Khan Academy for years and it has helped me through many a math test. However, if you only learn one thing watching all of the many videos, it has to be that Sal is not a great speller. Makes me feel better about my own lack of spelling acumen. P.S. I had to spell check "speller"
Question! Why did you say "Oxygen have 8 protons and 8 neutrons"? i thought the no# of protons and electrons are same but you subtract the total of protons electron from the atomic mass to get neutrons. am i wrong? please tell me someone. i am confused.
because oxygen has 8 protons, 8 neutrons and 8 electrons. the atomic mass is = # of neutrons + # of protons. electrons have a mass of like 1/18000 so they are neglected. im not exactly sure what you're saying but yes proton# = electron# atomic mass = proton#+neutron# therefore atomic mass - proton# = neutron#
I really love his humour, well you know. Great vid thanks, It helps with my revision. After watching all your videos, I'm gonna start skimming through the textbook and start doing some calculations T_T
Chuck Norris You read, write and speak English right? Well English came from (drum roll) ENGLAND! And in England they spell it sulphur. So you're wrong
I love how he mumbles to himself. Makes me feel better for doing the same thing in the middle of class.
I'm shedding tears of gratitude, thank you !!!! I was googling this for half an hour and finally I found this amazing channel!
13 years ago is crazy
@@R1-BrawlStars bro probably has a family now😭😭😭
@@togood4u791 ikr, people will tag us 10 years from now on as well.. imagine 😭
I am so incredibly grateful for this series of videos, how can I express my thanks? I need to pass chemistry and am struggling at age 46; I never took it in high school. Today I begin watching your entire series so I can fill in the gaps in my learning -- maybe the pieces will fall into place! Thank you so, so much!
If I pass my chemistry midterms this week I have the Khan Academy to thank....
Alan N
After 6 years
Well did you passed the chemistry midterm exam?
@@bahaar5215 lmao probably not
@@AceOfSpades7991 lmao
KhanAcademy is the best, Ive been out of school 10 years and just jumped into a biomedical science degree without any chemistry knowledge...they don't teach you crap in college, haha everything I know at this point, is thanks to Khan. I love it
I really appreciate your work, in these days for someone to actually pass on knowledge without asking for anything in return in amazing, Thank You.
5:12
When you unconsciously use British English 😂
You really blew my mind with the hydrogen = 1 proton. I managed to get a 5 in AP biology, and I understood most the concepts except little details like the splitting of water in photosynthesis. Watching your videos allows me to understand chemistry, which I never did due to a bad teacher, and string together all these pieces of information I have floating around in my head!
Thanks so much for taking the time and effort to make these videos!
Been of a great help as usual, thanks a million!!
Khan academy has helped me lots.
Thank you for such wonderful videos...plz do keep sharing more such videos!!!
wow I was 4 when this video was published 😅 I'm now (almost) 17 and watching this in prep for my chemistry exam
omg sameeee
How r u guys studying that at 16-17 yo , in my country i study that at 13 yo 🙂↕️😭
I honestly think they should replace homework with youtube videos, I learned more from Khan than I did from my teacher! =D
Khan Academy always saves my life. Thanks a lot for these amazing videos!
hey... you are doing a real good work ,teaching others. may you live long for this program you are are doing.
THANK YOU SOOOOOOO much! ur videos really help me in my studies as i'm appearing for gcse boards...
you're such a beauty. i understand chemistry now. thank you so much !
Wow your really simplified this for me. My Chem teacher was driving me crazy with this. Thanks
this helped me so much thanks for posting it and this helped me study for my test... ur videos r great and ur really smart
This vid helped me for couple of basic things. Thanks & wish to see some more from u.
Thank you for making it easy to understand.
I go to the Maine School of Science and Math and Sal is officially way better than any of my teachers and his videos have saved my school life many times :)
Love these videos, I wish you were my actual chemistry A-level teacher cause trust me, you'd be better
i would just like to say thank you for your hard work. if you ever read this i hope you know that I really mean whay i am saying. this must take hours and hours putting these together so i really appreciate it
@dxStevenS
Ur not alone with chem teachers that teach chaotically. It's hard to point out why it's a crazy class. I like Khan a lot. I watched his videos for DE and am just starting my chem classes. He's very methodical and thorough.
2022 just looking at the computer back then... wow, thank you for this video.
can you please be my chemistry teacher?
Yes pleasee🥺💖💖
🥺
You must have graduated now 🥺
the one thing i have to say u is
thank u,
you tech big concepts in very small time
which i have to suffer a lot know the same in my collage.
You are great, You ar helping me alot for mY upcoming examination
I always say that a teacher is the most important job ever. Because without people to teach us stuff, our society would be an under educated anarchy. But you, you don't ask for anything in return. you don't ask for money to watch these videos or anything like that. So i just wanna say thank you!
Best vid I've ever watched. Dude you the best
Good voice, Excellent presentation WELL DONE!!!👨🎓👨🎓👨🎓
This helped me so much on how to figure out empirical formulas
This was extremely helpful. Thank you!!!
the best chemistry teacher i ever had!
just for those who are interested, the benzene actually has two dohnuts where the electrons are free to move, one above and one below the molecule
Taught me more than the whole year studyin' in class!
What you do is amazing! I have found some of these relevant chemistry videos very very helpful. I learn more in 15minutes than i do in a class where we cover the same thing in 50 and i still dont understand it. Anyways what would be GREAT is if you could have a team that agrees with doing things for free so there could be a much wider useful youtube channel/s of knollege. What you do is brilliant BUT you need a TEAM! Teams get more done! Keep up all the good work
hi mate
He's accent is perfect until he says proTon. lol
but i love that dude! the amounts of times he saved my life
you do chem also? you saved me in physics and now youre joggin my memory of empirical formulae thanks
our chem teacher sux and screams at us if we didnt know what he means, so we dont ask him anything and we get low grades, this helped me out throughout the years :D thnx
helping me review for my chemistry exam tomorrow! thanks!
Thanks for uploading, you are the best!
I lover your panel at Stanford Big FAN, keep up the good work.
THANK YOUU!! YOU HELPED A LOT
damn im actually inderstanding stuff!
the colors make it wayy easier thanks again!
You'd be an awesome teacher!
hey sal
if you get the time could you make a video about Types of Reactions
In these questions we are given the products or reactants and we are supposed to identify the results after a reaction.
thanks
At 6:17, I believe he meant to say "for every 6 carbons, there are 12 hydrogen and 6 oxygens"...he said 1 oxygen. Regardless, thank you for ALL you videos...calculus, physics, chemistry...all are very helpful and most importantly easy to understand!
hey Sal! i think u explain really well but can u explain empirical formula in detail like from what it is to how to write it (also do u use the crisscross method to solve it??) plz reply asap!
05:14 "It's not a ph it's an f"
WRONG! In the UK anyway. Lol.
Thanks so much! I finally understand this!
that was really helpful!
Love Your videos Khan- your the best ; )
you have a good voice for radio!!!!
this guy knows everything.
Thanks for the vid! Got more out of one video than I have gotten out of six class periods....
@ericleb01 how do we see his tablet pen moving all around the screen then?
Thanks helped me a lot
wow that was great! EXTREMELY helpful! It makes me like chemistry a little lol
Ten years later~
hey sal your videos are great!!!
im gonna pass my tomorrow exam thanks to you :D
Thank you! I think i 'd better self-studying and watch youtube for the learning of chemistry instead of pay all the attention in school that i dont really understand,
Mr. Khan your are a beast!!!! Thank you so much
MR BEAST
MR BEST
I wish I had looked online to learn the sciences. Everything would've made a lot more sense.
@Budisawsome Its a tablet. He writes with a stylus on a board that is hooked to his computer. The computer translates this to the screen.
Thank you!!! i learn more from you than my professor lol
It's spelt Sulphur in Canada
... Lol how many countries do you see burning the Maple Leaf flag?
spelled*
Sarah Griffith lmao!
Sarah Griffith
It's spelt Sulphur everywhere (English-speaking-countries) except America.
Same here in India, it’s spelt Sulphur.
Dear brother , I like u and ur videos
So calcium(if it was in a very solid state like copper or iron is) is a better conductor than copper or iron, right? Because it's more electropositive...
When you are calculating the percent of each element in a molecule, wouldn't you find it through dividing by the mass of the whole molecule (so in the water example you would divide 1.00amu of hydrogen into the 17.00amu of the water molecule)?
@Budisawsome
He utilizes an electronic pen on a special board connected to the computer, allowing him to "write" on the computer.
thank you so much!
Great vid ...sulphur
thanks a lot brother!
"Most of" and "how much of" are imprecise and could refer to volume, mass, or quantity.
what is that program?
thanx helped a lot ^-^
Your calculator looking absolutely ancient
Thank you❤🌹😊
@goldensilverstar Actually it was changed to Sulfur quite recently i think.
How do we know whether we use double or single bonds?
Can you know which isotopes of the atoms are in a molecule, thereby getting a truly accurate mass?
Do you have videos on calculating empirical formula from molecular formula?
The RK it can be millions of chances...
CH can be C2H2. C999H999
Great video> Good to see another genius that's missing the "spelling" gene. lol, hey we're not Mathematicians. Keep up the gr8 work Sal. Stay n touch.
@Budisawsome
He uses an electronic pen that allows him to "write" on the computer.
this guy is awsome
@bodetcorreya YESS i completely agree, i have 4 teachers for chemistry and they all suck, they're just more worried about challenging us making the class almost impossible to pass, im really having a hard time understanding everything. thats why im always on here searching and teaching myself cause i dnt get them... its people like this guy that explain things so simply that i feel like theres hope for me in passing.lol im relieved!! Thank you for posting :) i still hate chemistry tho..
Thanks a lot for explaining so simply. Actually chemistry is easy when you have a teacher who konws to teach chemistry, if not its hell.
This will help me for tomorrows final test =D
Something I've learned from watching KhanAcademy videos: Khan really likes Magenta.
I knew someone who used to spend all day every day doing something with molecular structure, and he used to boast that nobody - not even his supervisor - knew what he was doing.
I thought 'Great. I wish MY supervisor didn't know what I was doing, so she would have to trust me.'
The kind of supervisor I have, knowing something she didn't would be a good thing since I would get even more respect from her.
He created new drugs for heart disease and he was a doctor.
@Broccolidiesel its funny that even when he is using a stylus he has such neat handwriting
Great! 🎉
what are you using to write on? it's soo cool
Angelyka Cabalo ur head shut up
I've been a big fan of Khan Academy for years and it has helped me through many a math test. However, if you only learn one thing watching all of the many videos, it has to be that Sal is not a great speller. Makes me feel better about my own lack of spelling acumen.
P.S. I had to spell check "speller"
He makes up for it by knowing just about EVERYTHING else
Benito Calabria Well you better call Sal
I miss that show!
Question!
Why did you say "Oxygen have 8 protons and 8 neutrons"?
i thought the no# of protons and electrons are same but you subtract the total of protons electron from the atomic mass to get neutrons. am i wrong? please tell me someone. i am confused.
because oxygen has 8 protons, 8 neutrons and 8 electrons. the atomic mass is = # of neutrons + # of protons.
electrons have a mass of like 1/18000 so they are neglected.
im not exactly sure what you're saying but
yes proton# = electron#
atomic mass = proton#+neutron#
therefore atomic mass - proton# = neutron#
Seriously what an awesome manly voice =]
I really love his humour, well you know.
Great vid thanks, It helps with my revision. After watching all your videos, I'm gonna start skimming through the textbook and start doing some calculations T_T
My blood boiled when he said Sulphur was spelt wrong...
it's spelled sulfur in america and that's the only place god pays attention, so suck it the fuck up and god bless america
Chuck Norris Please shut up. And I'm an American too, doesn't change the fact that you are acting like a pretentious patriotic hillbilly.
Chuck Norris You read, write and speak English right? Well English came from (drum roll) ENGLAND! And in England they spell it sulphur.
So you're wrong
I like the inbred royal look.
Jack stratif HAHAHA Very good!
(I certainly don't like the royals, but American arrogance is far worse)
Omg thank u 😭