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 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!
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
@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 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
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,
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
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
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!
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.
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!
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)?
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...
So if I only have the percent's of the atoms in the molecule, I multiply the whole # mass units of each by the percentage then do the empirical formula. Or at least I hope..... my reverse engineering is only about 60% accurate.
Because our bodies are made of that 90 % water to power just about every reaction in our body through hydrolysis, which given the name, requires water. If the amount of water in our bodies gets too low, then we start to dehydrate which soon seizes our bodies ability to break compounds down into there basic forms. That's just one of the reasons.
