CHEMISTRY COMMUNITY

CateJensen3K

What was the equation for acid rain from SO2?

CateJensen3K

I looked at this question for so long. Why a snail?

CateJensen3K

I believe it would be square planar is there are lone pairs

CateJensen3K

I would draw out the lewis structure in order to figure out the shape. The shape coordinates with the hybridization orbitals. steric #2= linear=sp steric #3= trigonal planar=sp2 steric #4= tetrahedral=sp3 steric #5= trigonal bipyramidal=sp3d steric #6= octahedral=sp3d2 They also coordinate with the ...

CateJensen3K

I believe the reason why is because when you put the formal charge on the central atom, the outer Is have a formal charge of 0 which makes entire ion more stable. When drawing lewis structures, I usually start by counting all of the valence electrons including the -1 charge. So for I, the valence el...

CateJensen3K

I was also confused by this problem. I think that you are correct, but I am not 100% sure. I would email a TA just to make sure.

CateJensen3K

double bonds are more stable

CateJensen3K

the maximum number of sigma bonds is one and then every bond after is a pi bond

CateJensen3K

If you count the amount of atoms and lone pairs surrounding the central atoms you will get the steric number.
# 2 = two sp orbitals
# 3 = three sp^3 orbitals
# 4 = four sp^3 orbitals
# 5 = five dsp^3 orbitals
# 6 = six d^2sp^3 orbitals

CateJensen3K

I don't think we will need to draw them, but it might be a good idea to look over what they look like.

CateJensen3K

I'm assuming we will need to know the names of the shapes for both our test and the Final.

CateJensen3K

It helps with the stability of the atom.

CateJensen3K

This was really helpful thank you!

CateJensen3K

You have to post on a weekly basis. If you haven't been posting you wont get the points.

CateJensen3K

Draw the Lewis structure, this will help you determine the shape.

CateJensen3K

I would check the syllabus, but I don't think the class is curved.

CateJensen3K

I believe the syllabus outlines what concepts will be on the exam.

CateJensen3K

V=(kq1q2)/d
V=Potential Energy
k=Positive-valued proportionality constant
q1=charge on particle 1 (positive proton or negative electron)
q2=charge on particle 2 (positive proton or negative electron)
d=distance between particles

CateJensen3K

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

CateJensen3K

He said not to worry about black body.

CateJensen3K

I believe that the book is correct.

CateJensen3K

I believe the problem will tell you which to use or it will give you the value.

CateJensen3K

Thank you!

CateJensen3K

I asked him and he said Sunday.

CateJensen3K

I think he just wanted us to understand where the orbitals come from? I'm not completely sure.

CateJensen3K

Usually you will be given the value for the actual yield because we are not in a lab course and then the value that you are calculating by using stoichometry is the theoretical yield.

CateJensen3K

It also helps to write out the units so that you can make sure that everything will cancel so that you can end up with the correct units.

CateJensen3K

Thank you so much! I couldn't figure out what I was doing incorrectly.

CateJensen3K

I completely forgot that they could be the same, thank you!

CateJensen3K

This was confusing for me as well. I looked back at the lecture notes and I have written down that the mass of sample (g) = number of moles (mol)*molar mass of element (g*mol^-1). I'm not sure if that helps or not?

CateJensen3K

dm^3 is the same as 1000^3, so I believe you are correct.

CateJensen3K

I am confused as to why C5H12O5 would be the Molecular Formula. I thought that would be the Empirical Formula?

CHEMISTRY COMMUNITY

Search found 32 matches

Acid Rain

Re: Snail velocity final problem

Re: tetrahedral or square planar?

Re: Sulfur Trioxide Hybridization

Re: Lewis structure of I3-

Re: 7th edition 2E.1 mistake ?

Re: double bonds vs. single bonds

Re: sigma and pi bonds

Re: Tips

Re: d Orbital

Re: Memorization

Re: Electronegativity

Re: Bond angles

Re: Chem Community Points

Re: VSEPR determining shape

Re: Final Grade

Re: Exam

Re: Coulombic potential energy

Re: Energy Levels

Re: Black Body Radiation

Re: Degenerate orbitals

Re: De Broglie's

Re: Quantum number song

Re: Chem Community Due Date

Re: Schrodinger Equation

Re: Percent Yield [ENDORSED]

Re: Test 1

Re: Review question L.35 in the 7th edition

Re: Question 22 on the post assessment for Empirical Formulas

Re: Moles and Atomic Masses/Weights

Re: If we ever have to use dm^3

Question 22 on the post assessment for Empirical Formulas