CHEMISTRY COMMUNITY

Sonam Sidhu 2J

Thank you Dr. Lavelle, You were my professor for both Chem 14A and 14B. You are definitely an incredible professor who cares about the education of his students; the sheer time, effort, and patience needed to provide the astounding amount of resources you offer is unimaginable. Thank you so much for...

Sonam Sidhu 2J

Hey guys, I'm sure many of you already know of this resource, but Khan Academy is great for giving you a quick overview of most of the topics we've covered in Chem 14B. The videos are short and informative so if you need a refresher before going to a review session, check it out. PRO TIP: Sal from K...

Sonam Sidhu 2J

Hi guys, I can't seem to find where the solutions for Quiz 3 are posted, can someone help me out? Thanks!

Sonam Sidhu 2J

Hi, I was wondering how we check our answers on the prep quizzes/midterms? I may have missed when/if it was mentioned at all.

Thanks!

Sonam Sidhu 2J

"The reaction 4Al(s) + 3O2(g) --> 2Al2O3(s) was investigated as part of a study on using aluminum powder as a rocket fuel. It was found that 1.000 mol Al produced 3378 kJ of heat in this reaction under constant-pressure conditions at 1000. degrees Celsius. What is the change in internal energy ...

Sonam Sidhu 2J

"CALCULATING THE WORK, HEAT, AND CHANGE IN INTERNAL ENERGY FOR THE EXPANSION OF AN IDEAL GAS Engineers working to develop new piston engines and turbines need to be familiar with the work and heat that are involved in various compression and expansion cycles that they use to model new engines. ...

Sonam Sidhu 2J

Hi, I was also wondering this and, after looking it up, I think this may be right: So after finding the area and multiplying it with the distance we end up with: 141.1 cm^3 We then multiply 141.1 cm^3 with 2.00 atm to get 282.8 cm^3*atm. Recall that 1 cm^3 is equal to 1 mL. 1 mL*atm = 0.101325 Joule...

Sonam Sidhu 2J

I don't know if anyone else mentioned this or if it's only my course reader, but I was flipping through the practice tests and on page 139, there's some drawings of Pokémon?? I tried to erase it but I think it may actually be printed on the page.

Just wanted to bring that to someone's attention.

Sonam Sidhu 2J

I was unclear on how Chem Community would transition if we were in 14A last quarter. Would the server know to give us credit for 14B or would we have to sign up again, etc.? When I signed in right now, I changed my username to include my discussion section so does that satisfy any and all things I n...

Sonam Sidhu 2J

Also, if after you have downloaded Microsoft Silverlight and the Webcast still insists that you need to download the program, try using the Internet Explorer browser instead.

Best of luck.

Sonam Sidhu 2J

I find the video modules very helpful, will there be more of them posted on the website as we continue through the chapters?

Sonam Sidhu 2J

Q: Why was the mole of oxygen molecules excited when he walked out of the singles bar?
A: He got Avogadro's number!

Sonam Sidhu 2J

Thank you very much for the clarification.

Sonam Sidhu 2J

"Calculate the molar mass of copper(II) sulfate pentahydrate." What does the (II) attached to the copper element mean? And how does it affect the molar mass or any part of the compound? Also, are we expected to instinctively know the elements that make up a compound when it is written out ...

CHEMISTRY COMMUNITY

Search found 14 matches

Re: Saying Thank You to Dr. Lavelle

Khan Academy

Re: Quiz 3 Prep answers

Re: Quiz 1

Self-Test 8.12B

Example 8.5 in Textbook

Re: Chapter 8 problem #9

Drawings in Course Reader?

14A to 14B Changes in Chem Community

Re: Bruincast

Video Modules

Re: Post All Chemistry Jokes Here

Re: Terminology Clarfication [ENDORSED]

Terminology Clarfication [ENDORSED]