This is how good test prep books do it. Princeton review, Barons, REA, Kaplan, Thompson etc. for the SAT, ACT, LSAT, MCAT, GRE, GMAT, AP courses, CLEP etc They go over all the options in detail
Do you plan on making a chemical biology series (NOT the same as biochemistry)? I’d love for you to talk about stuff like SDS-PAGE, western blotting, tandem mass spectrometry, activity-based protein profiling, and its importance in cancer research.
Hopefully this isn’t rude, but I’m a little confused as to why you say SDS-Page and western blotting aren’t “biochemistry “ 🤔 I LITERALLY studied biochemistry in college and a huge portion of my lab work WAS doing westerns/ SDS-Page. (I did a little mass spec too, but (A) mass spec is multi-disciplinary for sure, and (B) it’s more out of my comfort zone). TBH I had no idea there was even demand for content about western blots (😂 I guess I’ve just been scarred-as anyone who has wielded a nitrocellulose membrane could understand). …Anyways, your content idea sounds interesting! Tbh the cancer angle is really just tying in proteomics to rapid uncontrolled cell division (e.g., cell signaling pathways related to growth/ replication/ apoptosis/etc-and since proteins are heavily involved in every step of cell signaling, that’s probably not hard to do). Kinda off topic but, would you mind if I made a video or two about it? (I’d be happy to give you credit for the idea if you like). No pressure!
@@back2schoolbio It's not rude. It's just that I took a biochem class and a chemical biology (or chem bio) class. The biochem class mainly covered fundamental stuff that I didn't really think lended its way to stuff like drug discovery like the Krebs Cycle or glycolysis. The chem bio stuff mainly focused on biochem achievements that have found their way in stuff like drug discovery, including westerns & SDS-PAGE. I didn't learn about the latter 2 in the biochem class
@@back2schoolbio I think they just meant that chemical biology and biochemistry are not identical courses. You are reading too much into it. To be sure there is significant overlap in the disciplines.
13. CH2Cl2: this molecule can also be a right answer if you draw it in different way. I also believe that this should be the right answer because of the fact about “entropy”.
CH2Cl2 is tetrahedral, not square planar or anything where they could cancel out. There may be some steric repulsion due to large Cl atoms with lone pairs but it is nowhere near enough to take the bond angle from 109 degrees to 180 degrees.
The thought process is good, because considering isomerism is REALLY important the further you get into chem. It's just not important in this circumstance.
You should put an NMR question on there and give it to James Tour. I got 15 out of 15...but only because i already took this when you made the community post xD
great video! just wondering, what level is this content geared towards? high school or more advanced? because i just graduated school and i did chemistry and got a 94/100. but most of my friends that graduated doing other things don't even know what polar bonds are or what a lewis structure is. Also the test was a fun way to review some of the things i learned.
These qs r like child's play for those who prepare for an exam called jee advanced. Haha. 😢Idk wheather to laugh or cry 😭 seeing my situation. Ur entrance exam v good and easy, u guys r lucky.
it's just meant to overview gen chem concepts that are used in o chem, to see if you remember the concepts you need to progress in the course, tell you what you need to review, it's not meant to be like a full standardized exam
Hell yeah 40/100. That's almost half right for having studied next to nothing :D I put my answers below the "read more" to avoid spoilers (I mean, not really but yeah lmao) 01. a (best guess) 02. c (best guess) 03. b (best guess) 04. c (one that actually made sense to me) 05. b (this one I was kind of studying the angle on and thinking about geometry more than chemistry lmfao) 06. b (best guess) 07. b (one I ignored my gut on) 08. c (best guess) 09. b (in my defense, I wasn't actually paying attention to the molecule on this one >>) 10. b (made sense to me) 11. d (one I decided to ignore my gut on) 12. a (made sense to me) 13. d (made sense to me) 14. b (this one I thought about backward apparently lmao) 15. b (SALTWATER BEEEEETCH or would that be saltwater beach? XD)
For whatever it's worth, I decided to test GPT-4o against these 15 questions. Here is how it did: 1. C (correct) 2. B (correct) 3. D (correct) 4. C (correct) 5. B (correct) 6. C (incorrect) 7. D (correct) 8. A (correct) 9. C (correct) 10. B (correct) 11. A (correct) 12. A (correct) 13. D (correct) 14. A (correct) 15. B (correct) I'd call that a pass!
Probably not, the extent of my organic chemistry knowledge is helping my ex with high school organic chemistry and some patchwork of random facts. Depends on how hard it is. Not that i know nothing but, i'm not passing anything beyond highschool level i think, maybe a little more but, never systematically made an effort to learn it.
No. I can't pass the exam. Chemistry was never my thing, but it's cool as hell that you're teaching this! If only I understood the verbiage you're using. (Wtf is a polar bond?)
Polar means that the bond is between two atoms that pull electrons towards themselves with different strengths. So the electrons are on average closer to one atom than the other. Electronegativity is the relevant term.
An 89% solution was obtained by dissolving another 224 liters of SO3 in a part of the solution (p=1.33g/ml) formed by dissolving 224 liters of SO3 in 1200 g of water (under normal conditions). How much water is added to the original solution to bring the solution to a pH of 1?
I think 10/15 for having only ever taken inorganic chemistry 5 years ago pretty good especially when it was overthinking on 2 of them. Also can you explain or do you explain somewhere why it's called octahedral instead of hexahedral or something similar because of the number and configuration.
In question 8, isn’t scandium also correct? The 4s subshell is farther from the nucleus than the 3d subshell, so it would still have its outermost electron in the 4s subshell.
For the NO3- question, how was N(2+) and 3x O- resonance not considered? While I understand its much less stable, it is by definition a resonance structure.
Hi Dave, I hope you could answer this because college was 5 years ago for me, for the resonance structure. Is there a reason you can't break the pi bond in the Nitrate Ion and leave nitrogen or Oxygen with an otherwise incomplete octet?
Is an assessment really a pass/fail? Isn't the purpose to determine how much of the subject you know? Anyway, it's been more than 30 years since I did chemistry. I got a 19/100. Not great.
No. I quit my Major of Occupational therapist assistant because my Anatomy and Psychology class wanted me to learn all the stupid ass bone markings in the body AND know every little detail about Chemistry
Before we start - I'll say "Probably NOT". NEVER heard of "London dispersion" 60-70 yr ago. Ditto with sp3d. Do you realise - you NEVER explained WHAT London dispersion WAS. I wonder W. T. F. we were studying? It was CALLED "Organic" - I'm starting to DOUBT IT. Gave up. 🙄
Damn i aced it, when i saw organic chemistry I was expecting mechanisms and name reactions but these questions are all from general chemistry which is much more familiar to me and I had no issues, can't wait for part 2 when the real ochem starts!
Make sure to take the assessment exam here first before watching this review video 👉: chemmunity.info/dave
SIR PLEASE DO LIKE THESE VIDEO, THIS MAKES US EASY FOR JEE AND YOUR QUESTIONS ARE VERY GOOD 👍😊
Dave, your millennial editor can't even spell Assessment.... SIGH
Got half of the first 6 right
wound up with 55% - I'm happy
No, I can't.
Don’t lose hope!!
@@TriangularCosmos He can't lose if he never had it
I can, as in "I'm gonna pass..."
Came here to say this
I love this concept! Making learning more interactive rather than passive.
Hey Dave, I'm going to learn what I can, but I'm mostly here to give you watch time because you deserve it for what you do! Simulated Sun!!!
Wow, seems like a totally different style of video than usual. I like the little cam in the corner😄
It's actually a strategically placed tiny mirror...
Yes. Yes, I can. I passed it to the person on my right. He is displeased. 🙃
Conveniently, I have a chemistry test this Thursday on organic chemistry.
Thanks Dave.
Yes professor i got almost all correct but learned many new concepts.Thank you for explaining so well
This is how good test prep books do it. Princeton review, Barons, REA, Kaplan, Thompson etc. for the SAT, ACT, LSAT, MCAT, GRE, GMAT, AP courses, CLEP etc
They go over all the options in detail
PLEASE DEBATE SUBBOOR!! 😂 I would gladly watch you destroy him! Give the fans what they want
I agreed. He won’t do it.
@@ProfessorDaveExplainsHey Dave could u make a video debunking Bruce Lipton.
Thanks Dave 👌🏻
this instantley made me undestand how to determin hybridization. I shoukd have known before my inorganic chemistry exam but better late then never.
Dude, this smoked my brain, but it was fun. And I did pick up some concepts. I'm just a 43 year old guy who just likes science. This is awesome.
hello
Do you plan on making a chemical biology series (NOT the same as biochemistry)? I’d love for you to talk about stuff like SDS-PAGE, western blotting, tandem mass spectrometry, activity-based protein profiling, and its importance in cancer research.
oh that would be so cool
@@ianlee5812 That stuff would probably come under molecular biology, no? It’s all experimental assays
Hopefully this isn’t rude, but I’m a little confused as to why you say SDS-Page and western blotting aren’t “biochemistry “ 🤔 I LITERALLY studied biochemistry in college and a huge portion of my lab work WAS doing westerns/ SDS-Page. (I did a little mass spec too, but (A) mass spec is multi-disciplinary for sure, and (B) it’s more out of my comfort zone). TBH I had no idea there was even demand for content about western blots (😂 I guess I’ve just been scarred-as anyone who has wielded a nitrocellulose membrane could understand).
…Anyways, your content idea sounds interesting! Tbh the cancer angle is really just tying in proteomics to rapid uncontrolled cell division (e.g., cell signaling pathways related to growth/ replication/ apoptosis/etc-and since proteins are heavily involved in every step of cell signaling, that’s probably not hard to do).
Kinda off topic but, would you mind if I made a video or two about it? (I’d be happy to give you credit for the idea if you like). No pressure!
@@back2schoolbio It's not rude. It's just that I took a biochem class and a chemical biology (or chem bio) class. The biochem class mainly covered fundamental stuff that I didn't really think lended its way to stuff like drug discovery like the Krebs Cycle or glycolysis. The chem bio stuff mainly focused on biochem achievements that have found their way in stuff like drug discovery, including westerns & SDS-PAGE. I didn't learn about the latter 2 in the biochem class
@@back2schoolbio I think they just meant that chemical biology and biochemistry are not identical courses. You are reading too much into it. To be sure there is significant overlap in the disciplines.
Awesome video ill come back to it before my o chem exam for sure
wow this is amazing and well understood
13. CH2Cl2: this molecule can also be a right answer if you draw it in different way. I also believe that this should be the right answer because of the fact about “entropy”.
Its geometry is tetrahedral so you can never have the different dipoles cancelling out in precisely opposite directions, unlike with CO2.
However you draw it it’s still the same molecule with the same net dipole.
CH2Cl2 is tetrahedral, not square planar or anything where they could cancel out. There may be some steric repulsion due to large Cl atoms with lone pairs but it is nowhere near enough to take the bond angle from 109 degrees to 180 degrees.
The thought process is good, because considering isomerism is REALLY important the further you get into chem. It's just not important in this circumstance.
You should put an NMR question on there and give it to James Tour.
I got 15 out of 15...but only because i already took this when you made the community post xD
Well done my friend 👏
@@waelfadlallah8939 thanks :)
If 74/100 is considered passing, yes.
I feel like that title is aimed specifically at one person. Good use of the board too!
great video! just wondering, what level is this content geared towards? high school or more advanced? because i just graduated school and i did chemistry and got a 94/100. but most of my friends that graduated doing other things don't even know what polar bonds are or what a lewis structure is. Also the test was a fun way to review some of the things i learned.
It’s all stuff learned in 10th grade chem
Love you sir from India 🇮🇳🇮🇳
These qs r like child's play for those who prepare for an exam called jee advanced. Haha. 😢Idk wheather to laugh or cry 😭 seeing my situation. Ur entrance exam v good and easy, u guys r lucky.
it's just meant to overview gen chem concepts that are used in o chem, to see if you remember the concepts you need to progress in the course, tell you what you need to review, it's not meant to be like a full standardized exam
High school chemistry was 25 years ago and I think I got a D in it, and I've been in professional history since. No way I'm passing this.
Hell yeah 40/100. That's almost half right for having studied next to nothing :D
I put my answers below the "read more" to avoid spoilers (I mean, not really but yeah lmao)
01. a (best guess)
02. c (best guess)
03. b (best guess)
04. c (one that actually made sense to me)
05. b (this one I was kind of studying the angle on and thinking about geometry more than chemistry lmfao)
06. b (best guess)
07. b (one I ignored my gut on)
08. c (best guess)
09. b (in my defense, I wasn't actually paying attention to the molecule on this one >>)
10. b (made sense to me)
11. d (one I decided to ignore my gut on)
12. a (made sense to me)
13. d (made sense to me)
14. b (this one I thought about backward apparently lmao)
15. b (SALTWATER BEEEEETCH or would that be saltwater beach? XD)
For whatever it's worth, I decided to test GPT-4o against these 15 questions. Here is how it did:
1. C (correct)
2. B (correct)
3. D (correct)
4. C (correct)
5. B (correct)
6. C (incorrect)
7. D (correct)
8. A (correct)
9. C (correct)
10. B (correct)
11. A (correct)
12. A (correct)
13. D (correct)
14. A (correct)
15. B (correct)
I'd call that a pass!
I accidentally gave the option SF6 for question 2 even though I worked out PCL5 using steric number.😭
After being away from chemistry for 40 years i got 4 out of 7 correct 😒 i miss chemistry. Always respected it.
All I remember of organic chemistry was being given page after page of diagrams and told "remember this". Needless to say I didn't.
I got 34%. I know nothing but should have averaged out at 25%, so I'm happy.
Prof Dave should do livestreams imo
A rather basic, easy one, but yes, thank you for asking ^^
No Prof Dave I cannot. I barely graduated High-school. May the Old Gods, the New, and the undiscovered bless thee.
Mr. Farinaaaaaaa!!!!!! Here!!!!! GO!!!!!! GO!!!!!!! GO!!!!!!!!!!!!!
Hahahaha
Never gets old 😂
'You're witnessing the unraveling of a lunatic' 👏
I respect and admire science a lot despite being completely incapable of understanding most of it. (I try though.)
It was easy as hell...actually I'm a competitive exam student competing for Medicine in India
I really wish I'd known about these in my first year chemistry course for undergrad
I will do my best… but not without researching the material for every question 😅🫡
It blows my mind that the flat earthers called this guy dumb. That's some serious dunning kreuger right there.
I scored top of a class of 120 at ucsb... 40 years ago. I've forgotten more than I learned by this point.
Master ❤
Easy question studied when I was preparing for iit
Love it!
Well I guessed the first one correctly, so that's neat.
I'm only 8 minutes in and I've guessed the first three correctly based on process of elimination. maybe multiple choice isn't the best for exams 👀
I dont know can James Tour though.
Probably not, the extent of my organic chemistry knowledge is helping my ex with high school organic chemistry and some patchwork of random facts. Depends on how hard it is. Not that i know nothing but, i'm not passing anything beyond highschool level i think, maybe a little more but, never systematically made an effort to learn it.
No. I can't pass the exam. Chemistry was never my thing, but it's cool as hell that you're teaching this! If only I understood the verbiage you're using. (Wtf is a polar bond?)
Polar means that the bond is between two atoms that pull electrons towards themselves with different strengths. So the electrons are on average closer to one atom than the other. Electronegativity is the relevant term.
@@Nxck2440 I appreciate the info. Thank you!
Haven't watched the video yet... but no I can't.
I wrote the test, I scored 66%
You need a breaking bad Heisenberg hat & sunglasses for the next chemistry test 😎
An 89% solution was obtained by dissolving another 224 liters of SO3 in a part of the solution (p=1.33g/ml) formed by dissolving 224 liters of SO3 in 1200 g of water (under normal conditions). How much water is added to the original solution to bring the solution to a pH of 1?
I LOVE U 🎉🎉🎉😂😂❤❤❤❤
87/100 I felt that the exam was so basic, but still got two wrong 😶🌫️
I can't
I barely passed regular chemistry back in high school. 😅
I think 10/15 for having only ever taken inorganic chemistry 5 years ago pretty good especially when it was overthinking on 2 of them.
Also can you explain or do you explain somewhere why it's called octahedral instead of hexahedral or something similar because of the number and configuration.
It makes a shape with eight sides so it is called octahedral (you have to imagine the faces)
In question 8, isn’t scandium also correct? The 4s subshell is farther from the nucleus than the 3d subshell, so it would still have its outermost electron in the 4s subshell.
Yessss
For the NO3- question, how was N(2+) and 3x O- resonance not considered? While I understand its much less stable, it is by definition a resonance structure.
No
Can I pass your organic chemistry assessment exam?
Easy.
I'll take a pass on it!
Hey Professor Dave, do you know what happend to the AP chemistry Review playlist, those vied where really helpful and now I can't find them anymore 😥
Still in the same place but it’s a paid course now.
Without watching, no, no i cant lol
Hi Dave, I hope you could answer this because college was 5 years ago for me, for the resonance structure. Is there a reason you can't break the pi bond in the Nitrate Ion and leave nitrogen or Oxygen with an otherwise incomplete octet?
20:49 p.m. in UK
Give some Pchem lessons, introductory chem courses just make you think you’re doing it big until you hit the weed out courses lol!
Is an assessment really a pass/fail? Isn't the purpose to determine how much of the subject you know? Anyway, it's been more than 30 years since I did chemistry. I got a 19/100. Not great.
Bozeman science on steroids!!
No. I quit my Major of Occupational therapist assistant because my Anatomy and Psychology class wanted me to learn all the stupid ass bone markings in the body AND know every little detail about Chemistry
Why would they combine anatomy and psychology??
@@objective_psychology from context I'm sure they meant physiology
Got full marks
No.
i was one of the weird kids who actually liked Orgo in college
that's me as well
Uhm.. No?
I hade no hopes on myself but holy fuck
got 5 out of 7 without googleling and i'm not a native english speaker
I think it is inorganic chemistry
yeah its a review of the concepts you need from gen chem that will be used in o chem
probably it is easy
Hello
I'm sorry. I didn't study.
I only got one wrong
Bro u come and give my exam I challenge you
0:01 no
45/100
Nah, I'd win
Can you explain one problem in chemistry
Can you show me chemistry of how molecules assemble a cell MR FARINA. CLUELESS
This is gen chem
Yeah. The gen chem concepts you need to have mastered before taking ochem.
Not bothering with this one: I won't pass, hehehehe
cool
Before we start - I'll say "Probably NOT".
NEVER heard of "London dispersion" 60-70 yr ago.
Ditto with sp3d.
Do you realise - you NEVER explained WHAT London dispersion WAS.
I wonder W. T. F. we were studying? It was CALLED "Organic" - I'm starting to DOUBT IT.
Gave up. 🙄
Bud, it's a test, not a tutorial. If you want to learn this stuff visit my general chemistry playlist.
Fiiiiiirst, and definitely gonna fail it!
Damn i aced it, when i saw organic chemistry I was expecting mechanisms and name reactions but these questions are all from general chemistry which is much more familiar to me and I had no issues, can't wait for part 2 when the real ochem starts!
I think I will hahaha
I clicked the video, paused at 0:00 to give my answer, which is No.
No