General Chemistry 1A. Lecture 01. Introduction to General Chemistry. 

John L. LMFAOOO

She is very good at explaining this... Better than the Chemistry prof that I had anyway.

@@millions2nette he is being sarcastic you dummy

It was 6/8’s of mine

@@panavsingh283 Where can I find the description files in pdf?

@@ibrahimeng7886 there is a link given in description which takes you their website You can access the PDF there .

3 -ates

Well, I tried but the page is not displayed ​ @@panavsingh283

thanks

Thank YOU

bump for folks agonizing over this one

But history is what makes chemistry a lot more interesting! You get to learn what we believed chemistry was back then until present day, and how much we’ve progressed

Thank you!!

Ok

Same here

Also with minutes it take for sunlight to reach earth

I was good until 8 minutes in hahaha Where did she get 2807 from??

Don't forget the 1255 is part of the equation. She took the 1255 m/s multiplied it by the 1 miles and 3600 s (=4,518,000) and the divided that by the 1609.3 m. You'll find your 2807.

lol that calculation

is my calculation wrong?

search tyler dewitt on youtube. Now I can almost guarantee you will not be lost

Streets ahead is more like it

Agreed. Also, this course was probably the equivalent of my first high school chemistry class but in more depth, rigor and speed. This course would probably the equivalent of honors high school Chemistry. The succeeding course(s), Chem 1B and Chem 1C would be the equivalent of an AP Chemistry course at my high school and I did not take AP Chemistry but I know people who did.

I think they're just taught not to...

You don’t raise your hand in lecture. There is a separate section called “discussion” dedicated to asking questions, as well as office hours

zumdahl

Here to make up for my OWN incompetence because in chemistry in high school me and my friends just sat in the back and played counter strike on our laptops lol now I actually am kind of curious about what I was supposed to learn

@@elijahmasquelier1238 i remember learning about the chemical properties of THC before almost every chemistry class in high school.

@@elijahmasquelier1238 I didnt even have a chemistry class

It’s crazy that a professor could stink and continue to work while we seek out online lectures from other professors

Darell W. yes

Generally, you need to have prerequisites for taking certain classes. All that's a prerequisite for chemistry is college algebra.

Darell W. She is explaining conversion factors to people who already know the mathematical computations but have not yet realized that the earth is truly flat.

This is UC Irvine. The classes are not on a semester system. Its quarterly. Everything is fast paced to finish gchem and other courses in 10 weeks. Many of the times students will have to study on their own and fill in the blanks of what is not explained in detail in class.

+RespectMyHate CHM1020(intro)

Suppose you want to go on a road trip, and you know that your car has a range of "500 km" with a full tank. By studying a map, you determine that your route is 490 km long. 500 km is greater than 490 km, so that means you can just fill up the tank at the beginning, and then drive the whole way with stopping, right? Of course that's not actually a safe thing to do, because the uncertainty of the car's range is large: depending on the route, the weather, your driving style, etc. that "500 km" might really mean 450 km or 550 km. Similarly, the true length of the route depends upon how many wrong turns you take, whether you stop for a meal, whether you drive on the inside or outside lane in each curve, etc. So, the route might *really* be 510 km, for all you know. When the numbers are close like that, you need a safety margin - in this case, that means stopping for gas once even though you in theory you have enough range that you shouldn't need to. This kind of problem arises all the time in any quantitative science, including chemistry. The rules of "significant figures" are just a convenient way to track (very roughly) the level of uncertainty in your numbers, so that you can make intelligent decisions about what kind of safety margins are needed, or whether a discrepancy between the results you expect, based on theory, from an experiment are significant enough to be worth investigating further. As for dimensional analysis - one of the main themes of the "hard" quantitative sciences like chemistry and physics is the use of numerical measurements to compare things, and the use of mathematical formulas to predict or understand the behaviour of systems. Suppose I tell you that I weigh "170". What does that mean? The answer depends upon what units I attach to that number: If I say, "170 pounds", it means I have a normal, reasonably healthy weight for an adult male. If I say, "170 kilograms", it means that I'm morbidly obese. If I say, "170 centimetres", it means that I didn't understand the question. Dimensional analysis is an essential skill because without it, you can't understand how to use scientific formulas correctly. You also won't be able to compare values that are given to you in different units.

Right. One of the ways to explain to students WHY something is important with is mutiple examples of what goes wrong if they don't learn the concept. Sometimes teaching what can go wrong is a better lead because it ties students into why the idea is worth them giving effort to follow.

she is expecting that the students have already paid attention in all their previous math and chem classes. My chem teacher in high school drilled these details into us...

You can take this class in high school

@@CesarGA12 ikr I’m taking it rn

she says its two sig figs. Sig figs are from the decimal number not the exponents value. Remember when multiplying, you need the lowest amount of sig figs represented by the equestion in this case, 23 has two sig figs. Since the solution was over 10k with multiple sig figs, she rounded 10k and used exponentials to show 1.0; two sig figs.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BJCoby2j7Rs.html

Google the specific topic and exercises. There are millions of pdf versions on google just google the name of the topic + pdf

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Don't its a waste of time.

@@ms.pixxiedust7050 why?

+Random Guy You're right. The prerequisite course to this class is Chem1P (Preparation for Chemistry) or High School AP Chem.

+Random Guy im lost

UC Irvine is a very fast paced school upon acceptance most students have taken a advanced chemistry course in high school before graduating

NoobMcNooberson Nah this course would be the equivalent to HS AP Chem. Preparatory Chem would be like normal HS chem (but faster pace and perhaps a bit harder.)

Yes, High School regular chemistry. Problem is that most kids that get to UCI have taking chemistry as their freshman or sophmore year in high school and often there is an element of study for the test rather than for learning... this makes it so that we forget most of what we have been exposed to. Some of these concepts are taught as early as 3rd and 4th grade.

Randhani Nirwan

Rikki Sihl no you aren't, get tough💪 you got this!

what did u study during your first semester of chemical engineering?

@@kimtr111 i studied introduction to engineering (dropped the course), academic writing (B), pre calculus (B-), pre physics (dropped) and principles of macroeconomics (A)

Hey, I know it's been a while, but it's never too late! Science is always evolving and changing, and I think it'd be even better to study it now than ever :)

@@Larissa-qf2it Now I'm 34 years old. Something I've learnt in life, especially now with rising costs. You can do something you love and not get paid well for it or you can do something you're fine with, earn a lot of money and enjoy life while keeping what you like as a hobby. I love science, don't get me wrong. I had so much money saved I was thinking about investing in education all over again in Science (or even engineering since my physics is now very good - I still read science books and solve problems from the textbook). However, I took that money and invested in a house and stocks/bonds. Making a lot of money and able to travel. If i have put all that money in for a science degree, I won't be earning as much and might not even get a job in science - look at the job market now. Highly competitive. I still watch science stuff, read science textbooks, especially on the topic of medicine and human biology, but as a hobby.

+Rusty Shakleford 23 x 436 = 1028 not 1.0 x 10^4 or 1000

Yes

+Michael Chung nevermind she explains it in the comment section that she did her math wrong

You should read more. Google sociolinguistics

I dont get it... =(

+Daniel Teshiba Ortega No, generalmente los cursos en los estados unidos son los mejores que este.

No vayas a los EEUU si no entendés que te explica 3 veces que es un repaso de colegio ya que es la primera clase.

@@krzysztofmaksyminko8657 definitivamente 👌😅 esto fue hace 5 años, era joven e ignorante 🤷‍♂️

yes

Phew, good. I am glad I am the only one.

chem... what?

no you not, many people scare this subject

Haha I know, I thought the same thing too, she did the calculations wrong Ag 107 is 55.47 and Ag109 is 52.50 which gets you a total of 107.97

This is high-school sophomore chemistry...

It is, but so many teachers are absolutely horrible at what they do. I'm watching this because I was so done taking extra classes and tutoring with horrible teachers, and I need to know these very basic concepts for when I go into college this fall.

All I did was pause it when I got confused and then rewind it again so I could understand. It's very simple when you rewind it and listen again; I also recommend turning your volume up very high so you can listen better. These are advice from me, have fun

How do you know

+David Rendon Yeah, I believe so.

+David Rendon General Chem is too much for a lower-end PC to handle xD