CHEMISTRY COMMUNITY

Vista_Farkhondeh_3O

We never went over dienes and trienes in class right because I recall seeing a problem like this somewhere?

Vista_Farkhondeh_3O

If you have a cycloalkane as a substituent, does the prefix cyclo get included when alphabetizing? And do cycloalkanes take priority in numbering when they are substituents?

Vista_Farkhondeh_3O

So just to clarify, in the second transition step, Delta G double dagger 2 is the distance between TS2 and the original reactant, while Ea2 is the distance between TS2 and the intermediates? Please correct me if I'm wrong, or tell me this is right.

Vista_Farkhondeh_3O

Are we suppose to know what alkyl/aryl carbanions are bc the self test 4.1 asks about it?

Vista_Farkhondeh_3O

You do not use the pre equilibria approach if the first step is the slow step. Remember, the slow step is the rate determining step, so just write the rate law for that.

Vista_Farkhondeh_3O

So if the electron is coming from the bond, make sure to place the arrow starting at the bond instead of starting at the atom.

Vista_Farkhondeh_3O

Is H20 included in pre equilibria approach? Like in problem 101 b, why was H20 not included in the answer?

Vista_Farkhondeh_3O

When the problem says "at 25 degrees celsius," do we take that constant into account when doing sig figs?

Vista_Farkhondeh_3O

Happy Valentine's Day Everyone!

Vista_Farkhondeh_3O

Is the faraday constant on our formula sheet wrong because it says it's 96,4853 C.mol?

Vista_Farkhondeh_3O

I believe its all fair game

Vista_Farkhondeh_3O

If Avogadro calls, tell him to leave his number.

Vista_Farkhondeh_3O

When converting from Celsius to kelvins, I always 273. But should I be adding 273.15 instead?

Vista_Farkhondeh_3O

Yes delta u is equal to zero in an isothermal reaction. Since the temperature is constant, q=-w because the two cancel eachother out.

Vista_Farkhondeh_3O

Considering Dr. Lavelle intentionally did not give us these types of problems on the hw, I assume that we will not learn it, at least in chapter 8.

Vista_Farkhondeh_3O

Do we round to the nearest whole number when calculating delta H? For example, number 8.55 rounded -15.5kJ to -16.

Vista_Farkhondeh_3O

I don't quite understand when to use the 5% rule, like when Dr. Lavelle says "If you lose $1000 from a $1,000,000 it won't make a noticeable difference."

Vista_Farkhondeh_3O

The formula is 1/2(bonding electrons-antibonding electrons)

Vista_Farkhondeh_3O

How often do you post on chemistry community?
Periodically

Vista_Farkhondeh_3O

Because you need 2 moles of A for every one mole of B. You only have one mole of A, so technically, you'll only be using 1/2 mole of B. A runs out before B does, making A your limiting reactant.

Vista_Farkhondeh_3O

I believe the first priority is to make sure the formal charge is zero. Then, if you are able to form octets without compromising the formal charge you should do so.

Vista_Farkhondeh_3O

Will there be video modules posted for chapter 3? They were a great help for the last two chapters because they were very informative, yet concise. Thank you!

Vista_Farkhondeh_3O

Hi! For the units, my high school chem teacher said it would help if you think about it like a stair case. This way, you know which way to move your decimal. I attached a photo of the "metric stairs" to this comment.

Vista_Farkhondeh_3O

Can someone please explain again how this equation relates to sin and cos? Thanks

Vista_Farkhondeh_3O

One of the homework problems(F3) asks you to write the formula for nitric acid. How do I know derive the formula, and know whether they're asking for the molecular or empirical formula?

Vista_Farkhondeh_3O

If the SI unit for mass is kg, is it preferable to leave answers in kg or just g?

CHEMISTRY COMMUNITY

Search found 26 matches

Diene/Triene

Cycloalkanes as subsituents

Delta G Double Dagger 2 vs Ea2

Carbanions

Re: Quiz 2 Thursday question

Re: Determining Where Hydrogen Bonds

Pre Equilibria

Sig Figs

Re: Post All Chemistry Jokes Here

Faraday constant

Re: Derivations

Re: Post All Chemistry Jokes Here

Celsius to kelvins

Re: Internal energy of an isothermal system?

Re: Born-Haber Cycle [ENDORSED]

Rounding in Hess's Law

5 Percent Rule

Re: Bond Order [ENDORSED]

Re: Post All Chemistry Jokes Here

Re: Fall 2015 Midterm Q1A

Re: Octet Rule vs. Formal Charge

Video Modules

Re: Memorization Tricks

Relation to sin and cos [ENDORSED]

Nitric Acid

SI Unit Kg