CHEMISTRY COMMUNITY

Angelica Nava-1E

Thank You so much Dr. Lavelle for making Chemistry a subject that I've come to enjoy whereas in the past I didn't like so much. I loved your teaching style and all the opportunities you gave us to get help on things that we didn't understand. You are a great professor. Thank You again.

Angelica Nava-1E

For the name of the alkene I got 1,4 Dimethyl 2 butene but the answer is 3,4 dimethyl 3 heptene. Why is that? I thought that for the double bond it gets priority so it is 2 and the two methyl groups are on the 1st and 4th carbon. Also I drew out the structure and got 4 carbons on the longest chain w...

Angelica Nava-1E

For the quiz coming up would we need to write out the full reaction like we need to for the homework or will the reaction be given to us?

Angelica Nava-1E

How can I determine if an atom is an electrophile or nucleophile if it is not obvious?

Angelica Nava-1E

I am confused as to how I should use the 65 degrees C to find the initial rate of decomposition. Is the temperature important in this case?

Angelica Nava-1E

The question is to identify the elements undergoing changes in the oxidation state and indicate the initial and final oxidation state. The equation is H+(aq) + Cr2O7^2-(aq) + C2H5OH(aq) ----> Cr^3+(aq) + C2H4O(aq) + H20(l) The answer is that Cr is reduced from 6+ to 3+ and C is oxidized from 2- to 1...

Angelica Nava-1E

Could someone explain to me how to get #10 please? I am confused because we do not know the final temperature. I do believe we use the equation deltaS=qrev/T,by plugging in 200J/(273+20) you will get the answer. Where did you get the 273 from? I know q=200J and the temp. is 20 degrees C but where d...

Angelica Nava-1E

For a better understanding of entropy, I just wanted to know can I think of entropy as a random kind of system? Is what results from entropy random or systematic?

Angelica Nava-1E

When is it best to use the bond enthalpy method over the enthalpy of formation method and could I use Hess's Method, Bond Enthalpy Method, and Enthalpy of Formation for every problem the asks for the reaction enthaply or do some have restrictions?

Angelica Nava-1E

Why does NaCN (aq) effect the reaction with HCN (aq) for part A but for part B the NaCl (aq) have no effect on the NH2NH2 (aq)? And why is it 0.060+x on the ice table under CN- which tells me the initial of CN- is ).060 M when the 0.060M belongs to the NaCN not CN-?

Angelica Nava-1E

I was having trouble identifying when I should use the ICE table. What is the exact purpose of it and how do I know when to use it?

Angelica Nava-1E

For example, for CH2F2 is it okay if I draw the diagram with C in the middle and F with three lone pairs on the top and bottom of C with H on the left and right of C? The answer in the solutions for the text book is C in the middle with F with 3 lone pairs on the top and to the left of F with H to t...

Angelica Nava-1E

If a king farts is it a noble gas?

Angelica Nava-1E

Don't trust atoms because they make up everything.

CHEMISTRY COMMUNITY

Search found 14 matches

Re: Saying Thank You to Dr. Lavelle

1.25

Section 4.3 problem 4.28

Electrophile Vs. Nucleophile

Homework 15.11

Chapter 14 Question 1

Re: Quiz 1 Preparation Answers

Entropy

Bond Enthalpy and Energy of Formation

homework question 13.5

When Should I use the ICE table?

Does it matter where the atoms are placed in a Lewis diagram?

Re: Chemistry Humor

Re: CHEM JOKES