Search found 41 matches

by Eruchi Okpara 2E
Sat Feb 09, 2019 11:07 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: K constant
Replies: 4
Views: 125

Re: K constant

Is there a way to convert from atm to barr, when dealing with partial pressure?
by Eruchi Okpara 2E
Sat Feb 09, 2019 11:03 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 3/2R and 5/2R
Replies: 5
Views: 29

Re: 3/2R and 5/2R

So how do we know when to use either 3/2R or 5/2R?
by Eruchi Okpara 2E
Sat Feb 09, 2019 11:00 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: methods
Replies: 8
Views: 30

Re: methods

How do you know which bonds need to be broken?
by Eruchi Okpara 2E
Sat Feb 02, 2019 7:54 pm
Forum: Phase Changes & Related Calculations
Topic: U and its relations to work
Replies: 8
Views: 29

Re: U and its relations to work

Additionally, when do you know whether to use q or delta H?
by Eruchi Okpara 2E
Sat Feb 02, 2019 7:22 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: bond enthalpy equations
Replies: 6
Views: 21

Re: bond enthalpy equations

When solving for the enthalpy of a reaction, how do you know which bonds are supposed to be broken?
by Eruchi Okpara 2E
Sat Feb 02, 2019 7:17 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond enthalpies
Replies: 3
Views: 41

Re: Bond enthalpies

Are we expected to automatically know all the lewis structures/resonance structures in order to solve bond enthalpy problems?
by Eruchi Okpara 2E
Sat Jan 26, 2019 11:29 pm
Forum: Ideal Gases
Topic: atm vs. bar?
Replies: 17
Views: 109

Re: atm vs. bar?

There is a difference in the conversion formula that is used for both. I think its a difference in the R constant that is used for the formula PV=nRT.
by Eruchi Okpara 2E
Sat Jan 26, 2019 11:27 pm
Forum: Ideal Gases
Topic: kc vs kp
Replies: 15
Views: 64

Re: kc vs kp

If they just say "k" do we assume Kp? Because in one problem in the textbook they used K and then it was Kc. I think you can assume Kp when both reactants and products are all in the gas phase, or if told to find the equilibrium constant in atm. But I think that it might be safe to simply...
by Eruchi Okpara 2E
Sat Jan 26, 2019 11:22 pm
Forum: Ideal Gases
Topic: ICE table
Replies: 10
Views: 47

Re: ICE table

ICE tables can be used for both, but I think there are specific cases in which if you are supposed to be solving for partial pressure, or given the units atm, then you might have to use the formula PV=nRT to convert to pressure.
by Eruchi Okpara 2E
Thu Jan 17, 2019 4:04 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Relationship between pH, protanation and molarity
Replies: 5
Views: 155

Re: Relationship between pH, protanation and molarity

Can deprotonation still be found if we are given initial concentrations for both the reactants and products?
by Eruchi Okpara 2E
Thu Jan 17, 2019 4:02 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Relationship between pH, protanation and molarity
Replies: 5
Views: 155

Re: Relationship between pH, protanation and molarity

When solving for the percent deprotonation, is it always going to be the value you got for X (from the ICE table) divided by the initial concentration given?
by Eruchi Okpara 2E
Thu Jan 17, 2019 3:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Tables [ENDORSED]
Replies: 11
Views: 47

Re: ICE Tables [ENDORSED]

When using ICE tables, how do you know when its better to use the quadratic formula to find X or the 5% rule?
by Eruchi Okpara 2E
Sat Jan 12, 2019 4:43 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Table
Replies: 6
Views: 34

Re: ICE Table

Basically, yes; whenever you set up the ICE table, you start by assuming that the reaction hasn't taken place yet. Therefore, there won't be any products formed yet, so their initial concentrations are 0. So if we assume that the reaction hasn't happened yet, is that why for anything that has an in...
by Eruchi Okpara 2E
Sat Jan 12, 2019 4:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: How to use ICE tables
Replies: 5
Views: 48

Re: How to use ICE tables

I'm still confused on how to find the change in molarity, can someone explain please? Does the number in front of the X come from the coefficient that is in front of the reactant or product?
by Eruchi Okpara 2E
Sun Dec 09, 2018 1:47 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Boiling Point
Replies: 6
Views: 36

Re: Boiling Point

Can't you also determine which compound has a higher/ lower boiling point by looking at branching?
by Eruchi Okpara 2E
Sun Dec 09, 2018 12:32 am
Forum: Naming
Topic: Chloro vs Chlorito
Replies: 8
Views: 42

Re: Chloro vs Chlorito

I don't think there is a difference. Some of the names in the book are slightly different because the IUPAC Name Convention recently changed some of the names. However if you check the coordination compound list on Lavelle's website, it will show you which ones are the same.
by Eruchi Okpara 2E
Sun Dec 02, 2018 11:39 am
Forum: Hybridization
Topic: lone pairs
Replies: 20
Views: 91

Re: lone pairs

Is the answer automatically wrong if lone pairs are not separated from the shared pairs of electrons? for instance, if something has 3 shared pairs of electrons and 2 lone pairs, can it only be written as AX3E2 or can you write it as AX5?
by Eruchi Okpara 2E
Sun Dec 02, 2018 11:35 am
Forum: Hybridization
Topic: Pi bonds in triple bond
Replies: 17
Views: 255

Re: Pi bonds in triple bond

How would one combine s and p orbitals to create a sigma bond or a pi bond?
by Eruchi Okpara 2E
Sun Dec 02, 2018 11:33 am
Forum: Hybridization
Topic: 2SP^3 vs. SP^3
Replies: 6
Views: 40

Re: 2SP^3 vs. SP^3

So we are always supposed to include the coefficient in our hybridization answer?
by Eruchi Okpara 2E
Tue Nov 13, 2018 7:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Formula
Replies: 3
Views: 39

Re: VSEPR Formula

And how would you calculate the bond lengths for 2E 13?
by Eruchi Okpara 2E
Tue Nov 13, 2018 7:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework for VSEPR
Replies: 3
Views: 38

Re: Homework for VSEPR

In terms of the 7th edition, would the questions for 2E help the most? For practicing how to draw VSEPR?
by Eruchi Okpara 2E
Tue Nov 13, 2018 6:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework Due Week 7
Replies: 10
Views: 135

Re: Homework Due Week 7

What chapter are we doing this week for the 7th edition?
by Eruchi Okpara 2E
Sun Nov 11, 2018 11:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 6988
Views: 771120

Re: Post All Chemistry Jokes Here

That was sodium funny.

I slapped my neon that one!!!
by Eruchi Okpara 2E
Sun Nov 11, 2018 10:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Thanksgiving Wednesday
Replies: 9
Views: 162

Re: Thanksgiving Wednesday

705088777 wrote:If we have a chem discussion that day will it be canceled too?



And if our discussion is canceled would we just turn in the homework when we come back or on whatever day we have our fist class that week?
by Eruchi Okpara 2E
Sun Nov 04, 2018 6:59 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm questions
Replies: 5
Views: 53

Re: Midterm questions

Will VSEPR be on the midterm?
by Eruchi Okpara 2E
Sun Nov 04, 2018 6:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Material provided in all Chem 14A/14B quizzes and exams
Replies: 9
Views: 19582

Re: Material provided in all Chem 14A/14B quizzes and exams

Are we only allowed to use pen on the midterm like we did on test 1 and 2?
by Eruchi Okpara 2E
Sun Oct 28, 2018 5:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 38
Views: 19488

Re: Tutoring? [ENDORSED]

There are also a lot of office hours (step-up, drop-in, and workshops) that are up on the hill, which are a very convenient for students living on campus.
by Eruchi Okpara 2E
Sun Oct 28, 2018 5:21 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 74
Views: 25287

Re: Reading the textbook [ENDORSED]

Does anyone know what the sapling access code is for? Like, is having it actually helpful?
by Eruchi Okpara 2E
Sun Oct 28, 2018 5:14 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 28
Views: 15211

Re: How to find my posts

I think you have to use sub topic to create a new topic.
by Eruchi Okpara 2E
Sun Oct 21, 2018 6:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 8
Views: 111

Re: Test 2

I have the same question. And I was also wondering if test 2 would be as long as test 1 was?
by Eruchi Okpara 2E
Sun Oct 21, 2018 6:26 pm
Forum: Student Social/Study Group
Topic: Test #2
Replies: 6
Views: 71

Re: Test #2

Just for clarification: everything that was covered during Friday's lecture will be included in the test?
by Eruchi Okpara 2E
Thu Oct 11, 2018 4:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework and discussion grading?
Replies: 2
Views: 60

Re: Homework and discussion grading?

Score for homework 1 should be given out when the homework is passed back on the day that your discussion takes test one. However, I'm not sure when our grades are updated online.
by Eruchi Okpara 2E
Thu Oct 11, 2018 4:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Grading question
Replies: 11
Views: 505

Re: Grading question

Does anyone know when we will be getting our scores back from test one?
by Eruchi Okpara 2E
Thu Oct 11, 2018 4:41 pm
Forum: Administrative Questions and Class Announcements
Topic: 'extra credit' in Sapling Learning
Replies: 7
Views: 175

Re: 'extra credit' in Sapling Learning

Is signing up for Sapling required for the class?
by Eruchi Okpara 2E
Wed Oct 03, 2018 10:35 pm
Forum: Administrative Questions and Class Announcements
Topic: 'extra credit' in Sapling Learning
Replies: 7
Views: 175

Re: 'extra credit' in Sapling Learning

So are the quizzes extra credit or not? I plan on doing them anyway, but I would just like to know.
by Eruchi Okpara 2E
Wed Oct 03, 2018 10:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 38
Views: 19488

Re: Tutoring? [ENDORSED]

If I can't make it to office hours with Professor Lavelle (because of conflicts in my schedule), is there any way I can set up appointments?
by Eruchi Okpara 2E
Tue Oct 02, 2018 10:22 pm
Forum: Student Social/Study Group
Topic: Any necessary data booklets?
Replies: 2
Views: 75

Re: Any necessary data booklets?

Do I need to buy the 7th edition if I already have the 6th?

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