CHEMISTRY COMMUNITY

Julia Jones 1G

I believe it is appropriate to saw all bent structures are polar due to their shape. There will always be a net electronegativity pointing in one direction since they cannot cancel each other due to the bond angle.

Julia Jones 1G

Because of the lone pair, AX3E would be trigonal pyramidal and not tetrahedral.

Julia Jones 1G

Recognizing the VSEPR formula is very helpful for naming the shapes of each molecule so I would recommend learning these. I'm sure this will pop up on the final so you should probably get used to giving the AXE(formula), bond angles, and shape for each molecule given.

Julia Jones 1G

The final is cumulative, Dr. Lavelle said it will cover everything on the syllabus.

Julia Jones 1G

hybrid orbitals are orbitals created by the combination of atomic orbitals in the same atom. Hybridization happens when atomic orbitals mix to form a new atomic orbital.

Julia Jones 1G

on the website, Dr. Lavelle does outline what is on every test so check out the syllabus for the topics for each test!

Julia Jones 1G

yes, the dipole vectors can cancel eachother which causes the molecule to be nonpolar.

Julia Jones 1G

You can get points for creating your own question, replying to other questions, and asking a question on another thread

Julia Jones 1G

I know with writing classes, if you don’t fufill the prerequisites, Myucla doesn’t even allow you to enroll in the course. I’m not sure how it is for math and chem but maybe you could talk to lavelle and see if that would be acceptable. If you have AP credit for math that might also get you out of m...

Julia Jones 1G

Because the oxygen molecule has 2 oxygen molecules that are stuck together so they are non polar. They can’t have a dipole moment because they have the same electronegativity.

Julia Jones 1G

We can do homework from 3 and 4 because those are still the relavent topics. I believe they are also both on the test.

Julia Jones 1G

Chlorine is electronegative and H gives it an electron, making it slightly more positive and thus chlorine is more negative, creating a dipole moment

Julia Jones 1G

across the period, the nuclear charge and ability of the atom to pull electrons increases. As you go down, the atoms attract electrons less.

Julia Jones 1G

In discussion, our TA said they would be accepting any answer in between 120 and 140.

Julia Jones 1G

Electrons are first removed from the 4s orbital befofe the 3d orbital.

Julia Jones 1G

We do not need a blue book for the midterm

Julia Jones 1G

Thanks for the midterm practice problems!

Julia Jones 1G

Hi, I was wondering if chapter 1F will be included on the test on Tuesday because in class, Dr. Lavelle mentioned the test would only include information taught up to Friday's lecture, but the outline on his website shows that we should also know 1F. One of the TA also said we have to memorize the ...

Julia Jones 1G

I believe we need to know what n,l,ml, and s means and how we can find those numbers

Julia Jones 1G

Test 2 is not technically on the material from the first unit but you still need to know how to covert within units and such. He does provide a really good outline explaining what will be on the test though on his Chem 14A website so check it out.

Julia Jones 1G

wavelength and frequency are inversely proportional but energy and frequency are proportional to each other. the frequency can be thought of as 1/wavelength

Julia Jones 1G

When measuring wavelength, the standard unit is meters so make sure you convert it. For energy, the standard until is Joules.

Julia Jones 1G

We are given a cover sheet on the test that gives us all the formulas and constants we need!

Julia Jones 1G

You cannot use any form of graphing calculator on the test unfortunately so you will either need to borrow a scientific calculator or purchase one.

Julia Jones 1G

Lavelle and the TAs don't have to write the reaction equation without being given the name of the compound yet

Julia Jones 1G

If you get a number like 3.5, multiply everything by 2 to get the whole number of 7 (this will be your subscript for the element in the molecular formula)

Julia Jones 1G

Yes, all you have to do is convert the atoms to moles so you would divide 2.1x10^9 by 6.022x10^23 to get your final answer

Julia Jones 1G

The empirical formula represents the ratios of the atoms in their simplest form

Julia Jones 1G

For the test will we be expected to know the various SI unit prefixes and their meaning?

CHEMISTRY COMMUNITY

Search found 29 matches

Re: Bent Structures

Re: AX3E

Re: VSEPR Notation

Re: Final Exam

Re: Difference between hybridization and hybrid orbitals

Re: Test 3 Question

Re: Canceling?

Re: Chemistry Community

Re: 14B Co-Requisites

Re: Linear Shape of O2

Re: Homework Due Week 7

Re: HCl

Re: electronegativity trends

Re: MIDTERM Bond Length Question

Re: Is electron removed from 3d or 4s first?

Re: Blue Book Midterm

Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]

Re: Test On Tuesday

Re: Test 2

Re: test 2

Re: Wavelength and frequency proportions [ENDORSED]

Re: units

Re: Formulas

Re: Calculators

Re: Naming Compounds on Test?

Re: when to multiply empirical formula [ENDORSED]

Re: Problem E7 converting atoms to moles

Re: Definition of Empirical Formula

Re: SI Units