Search found 53 matches

by 605136321
Sun Jan 19, 2020 8:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm dates
Replies: 1
Views: 15

Midterm dates

what date/time is the midterm?
by 605136321
Sun Jan 19, 2020 8:20 pm
Forum: General Science Questions
Topic: Acids
Replies: 3
Views: 16

Acids

what's the difference between a bronsted acid and a lewis acid
by 605136321
Sun Jan 19, 2020 8:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6A . 3
Replies: 1
Views: 13

6A . 3

can someone explain this question please 6A.3 Write the chemical equations for the proton transfer equilibria of the following acids in aqueous solution and identify the conjugate acid–base pairs in each case: (a) H2SO4; (b) C6H5NH3 1, anilinium ion; (c) H2PO4 2; (d) HCOOH, formic acid; (e) NH2NH3 1...
by 605136321
Sun Jan 19, 2020 8:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm and final
Replies: 6
Views: 29

Midterm and final

are the midterms/tests and final cumulative?
by 605136321
Sun Jan 19, 2020 8:16 pm
Forum: Administrative Questions and Class Announcements
Topic: TeST 1
Replies: 5
Views: 27

TeST 1

What are the topics for test 1?
by 605136321
Sun Jan 12, 2020 1:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1 date
Replies: 4
Views: 16

Test 1 date

when is test 1?
by 605136321
Sun Jan 12, 2020 1:32 pm
Forum: Administrative Questions and Class Announcements
Topic: General HW question
Replies: 9
Views: 26

General HW question

our homeworks are graded on completion, not correctness, right?
by 605136321
Sun Jan 12, 2020 1:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Homework question
Replies: 1
Views: 20

Homework question

can someone help me with this homework question 5G.9 A sample of ozone, O3, amounting to 0.10 mol, is placed in a sealed container of volume 1.0 L and the reaction 2 O3(g) S 3 O2(g) is allowed to reach equilibrium. Then 0.50 mol O3 is placed in a second container of volume 1.0 L at the same temperat...
by 605136321
Sun Jan 12, 2020 1:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1
Replies: 2
Views: 16

Test 1

which topics is test 1 on
by 605136321
Sun Jan 12, 2020 1:28 pm
Forum: Administrative Questions and Class Announcements
Topic: HW 2
Replies: 7
Views: 25

HW 2

are we still just doing chemical equilibrium questions for homework 2?
by 605136321
Sun Dec 08, 2019 9:16 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL
Replies: 7
Views: 115

FINAL

how did everyone find the final?
by 605136321
Sun Dec 08, 2019 9:15 pm
Forum: Biological Examples
Topic: heme group
Replies: 4
Views: 43

heme group

whats a heme group
by 605136321
Sun Dec 08, 2019 9:14 pm
Forum: Administrative Questions and Class Announcements
Topic: curve
Replies: 8
Views: 100

curve

does anyone know how the grading is going to work- will there be a curve/how curved?
by 605136321
Sun Dec 08, 2019 9:12 pm
Forum: Administrative Questions and Class Announcements
Topic: 14A FInal
Replies: 6
Views: 82

14A FInal

does anyone know when the final grades are going to be posted?
by 605136321
Sun Dec 08, 2019 9:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 229
Views: 103922

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle, Thank you so much for such a great quarter! Your lectutres are always both very informative but also hilarious. I have thoroughly enjoyed this class, and having not taken chem since sophmore year of high school, I now feel like I'm finally getting back into it. Can't wait to take 14B wi...
by 605136321
Sun Nov 24, 2019 9:15 pm
Forum: General Science Questions
Topic: Ligand question
Replies: 2
Views: 25

Ligand question

Can someone explain what a ligand is
by 605136321
Sun Nov 24, 2019 9:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE Format
Replies: 34
Views: 121

Re: AXE Format

You don’t have to write the 1 but if you prefer to then you can
by 605136321
Sun Nov 24, 2019 9:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Curve
Replies: 3
Views: 60

Curve

Does anyone know if he’s going to curve the class
by 605136321
Sun Nov 24, 2019 8:57 pm
Forum: General Science Questions
Topic: Week 9 HW
Replies: 6
Views: 58

Week 9 HW

Does anyone know what the week 9 HW topics are?
by 605136321
Sun Nov 24, 2019 8:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 7
Views: 51

Test 2

Does anyone know when the test two grades will be posted
by 605136321
Sun Nov 17, 2019 9:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing molecules
Replies: 12
Views: 72

Drawing molecules

Are we going to have to draw out the molecules?
by 605136321
Sun Nov 17, 2019 9:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSPER
Replies: 7
Views: 49

VSPER

can someone briefly explain VSEPR
by 605136321
Sun Nov 17, 2019 9:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2 Review Sessions?
Replies: 6
Views: 59

Re: Test 2 Review Sessions?

are step-up sessions different to the other sessions?
by 605136321
Sun Nov 17, 2019 9:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 8 HW
Replies: 4
Views: 39

Week 8 HW

What topics can we do questions from for the week 8 HW
by 605136321
Sun Nov 17, 2019 9:50 pm
Forum: Student Social/Study Group
Topic: Test 2
Replies: 5
Views: 47

Re: Test 2

do you know what topics the test will cover?
by 605136321
Sun Nov 17, 2019 9:44 pm
Forum: Student Social/Study Group
Topic: Test 2
Replies: 5
Views: 47

Test 2

Does anyone know when test 2 is going to be?
by 605136321
Sun Nov 03, 2019 10:43 pm
Forum: Administrative Questions and Class Announcements
Topic: study guide
Replies: 2
Views: 22

study guide

does anyone know if theres gonna be a study guide that he gives us?
by 605136321
Sun Nov 03, 2019 10:35 pm
Forum: Administrative Questions and Class Announcements
Topic: slides
Replies: 4
Views: 37

slides

this might have already been answered but does anyone know if he posts the lecture slides and if so where?
by 605136321
Sun Nov 03, 2019 10:31 pm
Forum: Bond Lengths & Energies
Topic: Why Are Double Bonds Shorter
Replies: 16
Views: 173

Re: Why Are Double Bonds Shorter

single bonds are longer because there is less attraction to the nuclei, whereas double bonds have a greater pull and thus are pulled closer making them shorter
by 605136321
Sun Nov 03, 2019 10:29 pm
Forum: Administrative Questions and Class Announcements
Topic: HW 5
Replies: 1
Views: 26

HW 5

What sections can we do questions from for the homework this week
by 605136321
Sun Nov 03, 2019 10:24 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW question 1D.11
Replies: 5
Views: 40

Re: HW question 1D.11

thanks guys!
by 605136321
Sun Nov 03, 2019 10:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 11
Views: 97

Re: Midterm

so are we going to have class like normal on wednesday?
by 605136321
Sun Nov 03, 2019 10:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterms
Replies: 6
Views: 59

Midterms

There is only one midterm right?
by 605136321
Sun Oct 27, 2019 11:56 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW question 1D.13
Replies: 1
Views: 7

HW question 1D.13

can anyone help with this question: (a) How many values of the quantum number l are possible when n 5 7? (b) How many values of ml are allowed for an electron in a 6d-subshell? (c) How many values of ml are allowed for an electron in a 3p-subshell? (d) How many subshells are there in the shell with ...
by 605136321
Sun Oct 27, 2019 11:55 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW question 1D.11
Replies: 5
Views: 40

HW question 1D.11

can someone help me with this question:

How many orbitals are in subshells with l equal to (a) 0; (b) 2; (c) 1; (d) 3?
by 605136321
Sun Oct 27, 2019 11:48 pm
Forum: Trends in The Periodic Table
Topic: Homework #4
Replies: 5
Views: 45

Re: Homework #4

I thought we had done a little bit on chemical bonds, but maybe I'm wrong?
by 605136321
Sun Oct 27, 2019 11:45 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 3
Views: 28

Electron Configurations

Does anyone know if we are going to have to be able to physically draw the different shells or if we just need to know their different energy levels?
by 605136321
Sun Oct 27, 2019 11:43 pm
Forum: Administrative Questions and Class Announcements
Topic: HW 4
Replies: 2
Views: 25

HW 4

does anyone know what topics we can do for HW 4?
by 605136321
Sun Oct 20, 2019 10:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 20
Views: 1092

Re: Accessing the E-textbook [ENDORSED]

I bought my e-textbook as a rental on Amazon, if you download the kindle app this might be a good resource :)
by 605136321
Sun Oct 20, 2019 10:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem revision help
Replies: 2
Views: 20

Chem revision help

Does anyone know any good, concise youtube channels that cover the topics on the 14 series that would be useful for studying/brushing up on all of the material?
by 605136321
Sun Oct 20, 2019 10:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 11
Views: 97

Midterm

Does anyone know when the midterm will be and what the layout/structure of it will be like (how many questions, what topics etc)?
by 605136321
Sun Oct 20, 2019 10:11 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Multi-electron atoms
Replies: 7
Views: 30

Multi-electron atoms

What is a multi-electron atom, don't all atoms have multiple electrons except for H?
by 605136321
Sun Oct 20, 2019 10:09 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Writing Electron configurations
Replies: 2
Views: 12

Writing Electron configurations

how do you know which element to put in the square brackets when writing out the configurations, for example:

Sc is [Ar] 3d^1 4s^2

how do you decide that Argon goes in the brackets?
by 605136321
Sun Oct 13, 2019 8:17 pm
Forum: Significant Figures
Topic: Tests and Significant Figures
Replies: 6
Views: 75

Tests and Significant Figures

Normally I try to use the same amount of significant figures as the question in my answer, but sometimes the question has different amounts of significant figures for different values/measurements, so i was just wondering if there's a standard that Lavelle has for sig figs and how many that would be?
by 605136321
Sun Oct 13, 2019 8:14 pm
Forum: Balancing Chemical Reactions
Topic: Any Easy Way
Replies: 10
Views: 114

Re: Any Easy Way

it's definitely best to start with the least occuring element and go from there, but also if you ever want to check your work you can use this helpful website:

http://www.endmemo.com/chem/balancer.php
by 605136321
Sun Oct 13, 2019 8:08 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: HW question 1A.15
Replies: 2
Views: 43

HW question 1A.15

I was struggling with this question during the homework, can anyone help? 1A.15 In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral ...
by 605136321
Sun Oct 13, 2019 8:07 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: HW question 1A.11
Replies: 1
Views: 20

HW question 1A.11

can someone help explain how you would do this question: 1A.11 In the spectrum of atomic hydrogen, several lines are generally classified together as belonging to a series (for example, Balmer series or Lyman series, as shown in Fig. 1A.10). What is common to the lines within a series that makes gro...
by 605136321
Sun Oct 13, 2019 8:03 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Angstrom's Constant
Replies: 5
Views: 73

Re: Angstrom's Constant

Yes for example when converting from 1 angstrom which is 1*10^-10m to mm you would multiply by 10^3 which would give you 10^-7
by 605136321
Sat Oct 05, 2019 12:56 pm
Forum: SI Units, Unit Conversions
Topic: Homework
Replies: 9
Views: 150

Re: Homework

You could always write in pencil and go over in pen just to be safe too!
by 605136321
Sat Oct 05, 2019 12:55 pm
Forum: Balancing Chemical Reactions
Topic: H 7 a.
Replies: 3
Views: 38

Re: H 7 a.

Also if you ever need to check your equations are correct you can use this helpful website:

http://www.endmemo.com/chem/balancer.php
by 605136321
Sat Oct 05, 2019 12:53 pm
Forum: Balancing Chemical Reactions
Topic: H7
Replies: 3
Views: 38

H7

Is there an easy way to know how many atoms should be in each formula?
by 605136321
Sat Oct 05, 2019 12:51 pm
Forum: Balancing Chemical Reactions
Topic: Homework Question H.5 (c)
Replies: 2
Views: 28

Re: Homework Question H.5 (c)

a useful tool to help check if you're correct is:

http://www.endmemo.com/chem/balancer.php
by 605136321
Sat Oct 05, 2019 12:48 pm
Forum: Balancing Chemical Reactions
Topic: H.5
Replies: 2
Views: 35

H.5

for part c) Mg(N3)2(s) + H2O(l) = Mg(OH)2(aq) + NH3(aq)

I kept trying to balance but I couldn't figure it out, can anyone help?

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