CHEMISTRY COMMUNITY

Katherine Jabba 2H

That is fine. You can also put the numbers in front of the parent chain name if its a more simple molecule.

Katherine Jabba 2H

The first step of the two step reaction may have two products. For example a Br- ion and an organic compound with a positive charge on one of the carbons may be the two intermediaries of a two step reaction.

Katherine Jabba 2H

Carbonyls are also electrophiles even though the don't necessarily look like them.

Katherine Jabba 2H

Double and triple bonds have priority over substituents and should always be given the lowest possible number. For substituents, you give priority to them based on alphabetical order. Alphabetical order does not include any of the prefixes (di, tri, etc.) and it does not include the common prefixes ...

Katherine Jabba 2H

Question #5 shows a cycloalkene with iodine and bromine attached and asks you to name it. I named the compound 1-bromo-3-iodo cyclohexane, because I thought that the substituents should be placed in alphabetical order and if there was a "tie", you named the one alphabetically first with th...

Katherine Jabba 2H

A cloud of helium floats into a bar. The bartender says, "Hey! We don't serve noble gases here."

The helium does not react.

Katherine Jabba 2H

The pre-equilibirum approach uses a psuedo-equilibrium situation where one of the steps of the reaction is said to be at equilibrium and set equal to K, the equilibirum constant. This equation involving K is then manipulated and subsituted into the other reaction rate equation, so that the the react...

Katherine Jabba 2H

The oxidation number for elements in their natural forms is zero because these compounds are extremely stable. The oxidation number represents the number of electrons the element can give away (if positive) or lose (if negative). Such stable molecules have no electrons to lose or gain. The oxidation...

Katherine Jabba 2H

Why is it that if something is isothermal, that the change in U is zero? I was trying to derive this from the equations we learned in class, but I can't seem to remember/figure it out. Thanks!

Katherine Jabba 2H

How does constant volume, as opposed to constant pressure, Internal Energy? On page 25 of the course reader it states then if the change in V=0, then the Change in U=q_v, but I'm not really sure what q_v means.

Katherine Jabba 2H

Completely forgot to balance that 2nd equation. Thank you!

Katherine Jabba 2H

While working on homework problem 8.55, I noticed that I was having trouble canceling out the two given standard reactions to get the reaction enthalpy for the production of metallic barium. When I checked the solutions manual, the 2nd equation was listed as 2Al(s) + 3/2O2(g) --> Al203(s) instead of...

Katherine Jabba 2H

A video by Katherine Jabba(3I), Erik Whitney (3G), and Carolyn Stephens (3H) explaining an equilibrium concentration problem (#6A) from the Fall 2012 Final Exam. We hope this helps any students who are confused! Question: A vial of SO2 (0.522 M) and O2 (0.633 M) react and reach equilibrium. Calculat...

Katherine Jabba 2H

I understand how electron spins work, and the rules associated with pairing electrons and their spins. However, I don't understand what electron spins truly mean, and the role they play in the makeup of the atom.

Katherine Jabba 2H

Could someone explain the differences between the Lyman, Balmer, Paschen, and Brackett series? I know that they consecutivley begin with n=1, n=2, n=3, and n=4, but I don't understand exactly what that actually means in terms of the hydrogen atom.

CHEMISTRY COMMUNITY

Search found 15 matches

Re: Multiple Double Bonds

Re: Picking out Intermediates

Re: Nucleophile vs electrophile

Re: Numbering Carbons

Quiz 3 First Preparation #5

Re: Chemistry Jokes

Re: Pre Equilibruim Approach

Re: Oxidation Numbers for O2 and O3

Why does isothermal mean no change in internal energy?

Constant Volume & Internal Energy

Re: Hess's Law Enthalpy-Textbook Error? Or am I lost?

Hess's Law Enthalpy-Textbook Error? Or am I lost?

Video: Equilibrium Concentration Fall 2012 Q6A

Relevance of Electron Spin

Relevance/Difference btwn the series of hydrogen constants?