## Equations we need for midterm

Sofia Q
Posts: 49
Joined: Sat Aug 17, 2019 12:15 am

### Equations we need for midterm

Hi guys, as I do homework problems in preparation for the midterm I can't help to notice that some of them require equations that we did not practice with, or in some cases, not mention at all... Will we be expected to use them still? Or should we mainly focus on the application of equations that Dr. Lavelle explicitly went over during lecture?

For reference, I was starting the practice problems of the 1D section of Quantum World, specifically 1D.3.

Sunia Akaveka 4I
Posts: 67
Joined: Sat Sep 14, 2019 12:17 am
Been upvoted: 1 time

### Re: Equations we need for midterm

I believe 1D.3 is not a part of our recommended homework problems. Thus, we will not be expected to reproduce problems outside of the recommended homework problems and what Dr. Lavelle covers in lecture. I hope this helps.

305421980
Posts: 60
Joined: Sat Sep 07, 2019 12:16 am

### Re: Equations we need for midterm

Additionally, all of the equations will be provided on the constants and equations paper provided on test day. There is a copy on the website.

Julia Mazzucato 4D
Posts: 64
Joined: Fri Aug 30, 2019 12:17 am

### Re: Equations we need for midterm

Equations we need for the midterm:

Unit 1 (HS Review)
Dilutions: (Mi)Vi) = (MfVf)
Percent yield: Actual/theoretical X 100
M = moles/liters

Unit 2 - Quantum
Photoelectric effect:
E=hv
Ephoton - work function = KEelectron (energy of the photon minus threshold energy = kinetic energy of the ejected electron)
Atomic Spectra:
E=-hR/n2
v=-R[(1/n12)-(1/n22)]
De Broglie Equation: wavelength = h/p
Heisenberg Uncertainty (delta p)(delta x) >= h/4pi

that's pretty much all the formulas. the rest is conceptual, just knowing how to draw LDS, do quantum numbers, electron configurations, periodic table trends, formal charge, stoichiometry, etc.)

Elizabeth Harty 1A
Posts: 101
Joined: Sat Jul 20, 2019 12:16 am

### Re: Equations we need for midterm

is momentum mass times velocity?

sarahsalama2E
Posts: 143
Joined: Fri Aug 30, 2019 12:16 am

### Re: Equations we need for midterm

Yes it is

Jorge Ramirez_4H
Posts: 54
Joined: Wed Nov 21, 2018 12:19 am

### Re: Equations we need for midterm

How do we covert kj into J?

105289321
Posts: 49
Joined: Sat Sep 07, 2019 12:15 am

### Re: Equations we need for midterm

Divide the value in kj.mol by Planck's constant and then multiply by 1000 to convert from kj to j