CHEMISTRY COMMUNITY

Morgan Zapasnik 1N

Here is the final review session video. If you cannot see the video, that is okay. You will be able to soon. There were some technical difficulties, but Dr. Lavelle, Jonathan, and I are getting through it. Hopefully, the video the other student recorded will be posted soon as well. Thank you for fi...

Morgan Zapasnik 1N

For the second molecule (when drawing Newman projection), why does the one with the lowest energy have hydrogens on the same side? As opposed to putting one hydrogen on the left and one on the right.

Morgan Zapasnik 1N

For part a.) of this question, it asks "Draw a Newman projection for the gauche conformation of 1-iodobutane." Can someone please help me figure out how to draw this? There is a solution in the back of the book but I don't understand which C-C bond it is looking down. I started by drawing ...

Morgan Zapasnik 1N

Wow, that post was super helpful, thanks for linking it!

Morgan Zapasnik 1N

I think it's just a fact/concept that we need to know. In a different post Dr.Lavelle said that it's written on page 154 of the organic chemistry textbook (3rd paragraph from the bottom). Hopefully that page can help a bit!

Morgan Zapasnik 1N

For question number 2, can someone explain how ethyl & methyl are on the 3rd carbon? And what does it mean by the third carbon in the hexane line structure? A description or picture would be greatly appreciated!

Morgan Zapasnik 1N

Morgan Zapasnik 1N

For #3, it is a first order reaction, so you use the corresponding equation ln[A] = -kt + ln[A0] so, ln(.33) = -(.0068)t + ln(.75) ln(.33/.75) = -.0068t t = ln(.33/.75)/-.0068 t = 120 sec Thank you! I had the same question the answer I got was 120.73... are we not suppose to round to three sig figs...

Morgan Zapasnik 1N

For number 4:
In Lavelle's lecture (on January 20), he mentions that 3/2 comes from... "if you take a gas molecule it can move in 3 dimensions (x,y,z), which is .5+.5+.5 which gives you 3/2". Hopefully that helps clarify it a little!

Morgan Zapasnik 1N

My understanding is that in a closed system, you can only have an exchange/transfer in energy (heat), but not in mass.

Morgan Zapasnik 1N

As a follow-up question, can the triple point occur for other molecules?

Morgan Zapasnik 1N

Can someone please write out the chemical equation for the following problem and clarify how the titration works please? The question is 8D from the 2015 Final, and it states: "During a strong-base strong-acid titration calculate the pH when 49.00mL of 0.100M NaOH has been added to 50.00mL of 0...

Morgan Zapasnik 1N

I have a quick follow up question about naming coordination compounds!
How do we know when to use the latin name of certain metals vs when to just use their normal names?
For example, when is iron called ferrate?
Thanks in advance!

Morgan Zapasnik 1N

The question states: "A patient died due to a blood pH of 6.5. Is this a result of acidosis or alkalosis? Based on the above overall reaction, what was a possible cause of this low pH?" The overall reaction is: CO 2 +2H 2 O = H 2 CO 3 + H 2 O = H 3 O + + HCO 3 - My question is: how do you ...

Morgan Zapasnik 1N

Question #8 from the Fall 2014 quiz 3 prep asks: For the following reaction, if initially 0.100 mol of H 2 O (g) is placed in a 4.0 L vessel, what is the equilibrium partial pressures of each reactant and of each product? H 2 O (g) + C(s) --> H 2 (g) + CO (g) Kp= 3.72 at 1000K Can someone please exp...

Morgan Zapasnik 1N

Can someone please explain what bond order is and why we would need to find it? How is calculating the bond order helpful?

CHEMISTRY COMMUNITY

Search found 16 matches

Re: Final Exam Details and Review Sessions Winter 2017

Re: Practice Problems

Organic Chemistry Textbook Self-Test 3.3B

Re: 15.67

Re: Homework question 4.30

Re: Quiz 3 Winter 2017

Re: Post All Chemistry Jokes Here

Re: Quiz 2 Winter 2017

Re: General questions [ENDORSED]

Re: Examples of Isolated systems [ENDORSED]

Re: Triple Point

Titration Problem 8D - 2015 Final

Re: Naming Coordination Compounds

Fall 2016 Final Q7A

Quiz 3 Prep: Fall 2014 #8

Bond Order Overview [ENDORSED]