CHEMISTRY COMMUNITY

Erica Li 1C

Yup! Both highest at fluorine

Erica Li 1C

Yeah I'm pretty sure Lavelle said that he would always be asking for molecular geometry

Erica Li 1C

Yeah! The shape is linear with bond angles 180 degrees

Erica Li 1C

You look at the number of orbitals in a given subshell and then multiply it by 2 since there are 2 electrons in each orbital
(so if l=2, there are 5 orbitals, meaning 10 electrons)

Erica Li 1C

Since you are given diameter (2x10^-4 m) and you are trying to find velocity, you just have to figure out what the mass of oxygen is since it's asking for uncertainty of velocity of the oxygen molecule. Since oxygen is diatomic, it's O2, so when you find the mass it would be 32 g/mol x 1/6.022x10^23...

Erica Li 1C

For expanded octets, how do you know the maximum number of bonds they can form?

Erica Li 1C

If you're given the value for pH, to find pOH is it literally just 14 minus the pH?

Erica Li 1C

I'm still kind of confused on what exactly effective nuclear charge is as well as what its trend is in the periodic table?

Erica Li 1C

What exactly are the "general" steps that you would take if you were calculating a combustion analysis problem?

Erica Li 1C

I was wondering what exactly the differences/similarities are between Lewis acids and bases and Bronsten acids and bases?

Erica Li 1C

Are we supposed to know off the top of our heads what complexes like (en) and (ox) are?

Erica Li 1C

In 3d it asked you to draw a picture showing how a pi bond would be formed from two p orbitals but I had no idea how you're supposed to draw that??

Erica Li 1C

How do you calculate the wavelength of the ejected electron? It's given that the chromium metal is irradiated with light (wavelength 3.45x10^-11 m) and the kinetic energy is 2x10^-19 J and in part a it was found that the work function is 5.76 x 10^-15 J, but how do you find the wavelength of the eje...

Erica Li 1C

On my third test in this class one of the questions was to order the anions I-, Cl-, S2-, and P3- from least to most polarizable. I was wondering why Cl- is the least polarizable even though it has a -1 charge?

Erica Li 1C

Are we only supposed to look at the sigfigs given for values in the question? Do we have to account for sigfigs in the constants that are given?

Erica Li 1C

I'm confused as to where to start with this question because the units are given as 1/cm? Would I just do unit conversions to convert it to m and then solve it as usual?

Erica Li 1C

I'm super confused on how to figure out if a polydentate is monodentate, bidentate, etc. based on Lewis structure?

Erica Li 1C

I was wondering what the difference between a molecule with high ionic character vs. high covalent character was?

Erica Li 1C

The book mentioned something about a Kekule structure but I didn't really understand what that was/the significance of it. Could someone explain it to me?

Erica Li 1C

I'm confused, are all the atoms outside of the period 2 ones able to have an expanded octet?

Erica Li 1C

Nope! just make sure that there's one dot on all 4 sides before you can start pairing them together

Erica Li 1C

I think you don't have to, but I also think that as we go along and do more problems that use common elements like that you'll start to memorize their charges anyways

Erica Li 1C

Just to add on to that, they follow the duplet rule as opposed to the octet rule!

Erica Li 1C

In general are ionic bonds much stronger than covalent bonds?

Erica Li 1C

Removing the first electron is easier since the pull isn't as strong but the second one is always harder since there is a pull on the electrons that are left so it's harder for them to be removed

Erica Li 1C

r is the distance from nucleus, theta is the angle from the positive z-axis (the "north pole", kind of like latitude), and phi is the angle about the z-axis (like longitude)

Erica Li 1C

I don't think I really understand the de Broglie equation at all and how it relates to what exactly we're learning, could someone explain it to me?

Erica Li 1C

For a black body, as the temperature increases the max intensity of radiation produces shorter wavelengths as well

Erica Li 1C

Is there any helpful way to memorize the diatomic molecules?

Erica Li 1C

I'm not sure if "m" is used for molarity, but I think M refers to molarity (molar concentration), and "m" is used to denote the units for meters and I guess "m" can also be used to symbolize mass??

Erica Li 1C

I think you can do any 7 you want but it's probably better to do most of the ones he lists for practice for the test

CHEMISTRY COMMUNITY

Search found 31 matches

Re: ionic and covalent bonds

Re: Shape

Re: VSEPR

Re: Determining electrons

Re: Help with problem

expanded octet bonding

pH vs. pOH

effective nuclear charge

combustion analysis?

Lewis acids and bases vs. Bronsten

memorizing complexes?

Test 3 Q3D

Test 2 Q2c

Test 3

when to round?

HW 1.55A

polydentate complexes?

ionic vs. covalent character

kekule structure?

octet rule exceptions?

Re: Lewis Dot Order

Re: Polyatomic Ions

Re: Octet Exceptions

ionic vs. covalent bonds

Re: ionization energy

Re: spherical polar coordinates

explain debroglie equation?

Re: What is a black body? [ENDORSED]

diatomic molecules

Re: V=n/c

Re: Homework Questions [ENDORSED]