Search found 43 matches

by America Alvarado
Thu Dec 03, 2020 8:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Number
Replies: 9
Views: 31

Re: Finding Coordination Number

Thank you soo much for all your help! I finally understand!
by America Alvarado
Wed Dec 02, 2020 11:07 pm
Forum: Lewis Acids & Bases
Topic: Acids and Bases
Replies: 2
Views: 14

Acids and Bases

Do acids and bases have anything to do with the electronegativity of an atom?
by America Alvarado
Wed Dec 02, 2020 10:57 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Number
Replies: 9
Views: 31

Finding Coordination Number

How do you calculate the coordination number? I'm really lost.
by America Alvarado
Sat Nov 28, 2020 8:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 15
Views: 51

Re: Final

Where are the dates for the test?
by America Alvarado
Sat Nov 28, 2020 8:10 pm
Forum: Sigma & Pi Bonds
Topic: sapling #15
Replies: 23
Views: 55

Re: sapling #15

single bonds are sigma and every double bond contains one sigma and one pi bond
by America Alvarado
Fri Nov 27, 2020 10:06 pm
Forum: Student Social/Study Group
Topic: Sampling Give Up Option
Replies: 12
Views: 42

Sampling Give Up Option

What happens if we give up on a question? Do we lose the points for that question?
by America Alvarado
Wed Nov 25, 2020 9:18 am
Forum: Hybridization
Topic: Hybridization Clarification
Replies: 9
Views: 48

Re: Hybridization Clarification

In lecture, Dr. Lavells referred to many "unhybridized orbitals". How exactly can you identify these? Well hybridized orbitals are a combination of atomic orbitals, so unhybridized orbitals would be the left over orbitals that are not combined, or the ground state of the atom. Hope this h...
by America Alvarado
Wed Nov 25, 2020 9:10 am
Forum: Lewis Structures
Topic: Octet Rule
Replies: 17
Views: 60

Re: Octet Rule

I had a follow-up question to this discussion thread, is there a maximum number of electrons an expanded octect can accommodate? I had read somewhere that it depends on how many orbitals the valence shell of an atom has. If it has more orbitals free then it will be able to accommodate more electron...
by America Alvarado
Thu Nov 19, 2020 12:54 am
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation Number
Replies: 11
Views: 70

Re: Oxidation Number

So are the oxidation numbers usually given? or are we suppose to know that Oxygen has an oxidation number of -2?
by America Alvarado
Thu Nov 19, 2020 12:50 am
Forum: Quantum Numbers and The H-Atom
Topic: London Dispersion Forces
Replies: 4
Views: 26

Re: London Dispersion Forces

thank you! I understand now
by America Alvarado
Thu Nov 19, 2020 12:48 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: Hydrogen Bond
Replies: 5
Views: 36

Re: Hydrogen Bond

Correct, like Lucy said, since there is no bond between hydrogen and carbon there are hydrogen bonds
by America Alvarado
Thu Nov 19, 2020 12:47 am
Forum: Administrative Questions and Class Announcements
Topic: Discussion participation
Replies: 2
Views: 24

Re: Discussion participation

Is there a way to make up posts points missed?
by America Alvarado
Mon Nov 16, 2020 10:54 pm
Forum: Quantum Numbers and The H-Atom
Topic: London Dispersion Forces
Replies: 4
Views: 26

London Dispersion Forces

What are London dispersion forces ?
by America Alvarado
Thu Nov 12, 2020 3:50 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation Number
Replies: 11
Views: 70

Oxidation Number

How do you determine the oxidation number of a molecule? For example the oxidation number of ClO4-? Thank you
by America Alvarado
Sun Nov 08, 2020 11:13 pm
Forum: Student Social/Study Group
Topic: Veterans Day
Replies: 16
Views: 110

Re: Veterans Day

Thank you everyone!
by America Alvarado
Sun Nov 08, 2020 11:11 pm
Forum: Ionic & Covalent Bonds
Topic: Electronegativity
Replies: 16
Views: 84

Re: Electronegativity

So the more valence electrons an atom has, the higher its electronegativity?
by America Alvarado
Sun Nov 08, 2020 11:09 pm
Forum: Lewis Structures
Topic: Resonance Structures
Replies: 3
Views: 34

Resonance Structures

How do you draw resonance lewis structures? Like how do you know where to put double or single bonds or how to you rearrange a structure so it's still similar? I'm having a hard time answering the hw question asking for two resonance structures of a carbamate ion.
by America Alvarado
Sun Nov 08, 2020 11:04 pm
Forum: Student Social/Study Group
Topic: midterm
Replies: 6
Views: 37

Re: midterm

I was wondering the same thing. I'm going to ask the TA during discussion.
by America Alvarado
Sun Nov 08, 2020 11:02 pm
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 209

Re: Mid-quarter Check in

This quarter feel so long. I feel exhausted and I'm having a harder time understanding the material after Midterm 1. I don't know if anyone else feels the same.
by America Alvarado
Fri Nov 06, 2020 12:52 am
Forum: Student Social/Study Group
Topic: Veterans Day
Replies: 16
Views: 110

Veterans Day

Does anyone know if there is discussion section on Wednesday since it's Veterans Day?
by America Alvarado
Sun Nov 01, 2020 1:14 pm
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 45
Views: 336

Re: Tips for Staying Focused

This may sound weird, but it really helps me. To stay focused I talk to myself about whatever I'm studying. If I write something down I also say it out loud like if I were explaining it to someone.
by America Alvarado
Sun Nov 01, 2020 1:08 pm
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 233

Re: Homework due date

Sampling homework is always due Sunday night at 11:59pm
by America Alvarado
Sun Nov 01, 2020 1:07 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8245
Views: 1444285

Re: Post All Chemistry Jokes Here

Omg these are actually funny
by America Alvarado
Sun Nov 01, 2020 12:38 pm
Forum: Photoelectric Effect
Topic: Sampling Hw #19
Replies: 2
Views: 22

Sampling Hw #19

What would the speed of each particle be if it had the same wavelength as a photon of orange light (lambda=625.0 nm)? Did anyone else have trouble finding electron and alpha particle speed using the de Broglie's equation? I converted nm to m and used v= h/m*lambda but I keep getting the incorrect an...
by America Alvarado
Tue Oct 27, 2020 8:40 pm
Forum: Einstein Equation
Topic: Textbook Problem 1B.9
Replies: 5
Views: 57

Re: Textbook Problem 1B.9

Yea, you're right. You use E=hc/lambda. Then you multiply 32W times 2 because it's asking in 2 seconds. Then you divide 64W by what you got from E=hc/lambda and that is how many photons are generated. For the second part, you use Avogadro's constant to find the moles. Hope this helped!
by America Alvarado
Sat Oct 24, 2020 4:52 pm
Forum: Student Social/Study Group
Topic: Text Book Solutions
Replies: 2
Views: 19

Re: Text Book Solutions

Francesca_Borchardt_2L wrote:Hello,

They are located towards the end of the textbook. The odd exercises answers are there. Page C12 is where the answers are.

Hope this helps!

Thank you!
by America Alvarado
Sat Oct 24, 2020 4:46 pm
Forum: Student Social/Study Group
Topic: Text Book Solutions
Replies: 2
Views: 19

Text Book Solutions

Does anyone know where to find the textbook solutions to the practice problems?
by America Alvarado
Sat Oct 24, 2020 12:21 pm
Forum: Trends in The Periodic Table
Topic: Sampling Hw #16
Replies: 3
Views: 43

Re: Sampling Hw #16

Ground state electron configuration is when the electron is at its lowest energy available. For instance the ground state configuration for oxygen would be 1s2 2s2 2p4. But let's say you excite it, then the electron will move up a quantum level to another orbital. So the excited state configuration...
by America Alvarado
Fri Oct 23, 2020 4:35 pm
Forum: Trends in The Periodic Table
Topic: Sampling Hw #16
Replies: 3
Views: 43

Sampling Hw #16

Hi, can someone explain the ground state electron configuration? I don't know the difference in written configuration between excited and ground state.
by America Alvarado
Fri Oct 23, 2020 4:30 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Writing Electron Configuration
Replies: 2
Views: 22

Writing Electron Configuration

What is the difference between excited-state electron configuration and ground-state electron configuration? and what is the difference in writing the electron configuration of each?
by America Alvarado
Wed Oct 21, 2020 6:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 1 date
Replies: 2
Views: 38

Midterm 1 date

Does anyone know when the midterm is? I didn't see a date on the syllabus.
by America Alvarado
Wed Oct 21, 2020 1:58 pm
Forum: DeBroglie Equation
Topic: worked example
Replies: 5
Views: 68

Re: worked example

Chem_Mod wrote:This value is the mass of an electron. It will also be given to you on the formula sheet.

Ohh okay, thank you!
by America Alvarado
Wed Oct 21, 2020 1:01 pm
Forum: DeBroglie Equation
Topic: worked example
Replies: 5
Views: 68

worked example

On Monday's lecture 10/19, the professor was working on the example "Calculate the wavelength of an electron traveling at 5.3(10^6) m.s^-1" (14:08) when he worked it out he put 9.11(10^-31)kg as mass. Does anyone know where he got this number from?
by America Alvarado
Sun Oct 18, 2020 2:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Exam Format
Replies: 14
Views: 89

Re: Midterm Exam Format

Off topic, but does anyone know the passing rate of this class? I'm starting to get nervous.
by America Alvarado
Sun Oct 18, 2020 2:12 pm
Forum: Administrative Questions and Class Announcements
Topic: webcams
Replies: 6
Views: 32

Re: webcams

wait so in addition to our laptop cam we need another camera?
by America Alvarado
Sun Oct 18, 2020 2:10 pm
Forum: Student Social/Study Group
Topic: studying for exams
Replies: 18
Views: 167

studying for exams

How do you study for exams? Are there equations we're suppose to go in knowing?
by America Alvarado
Sun Oct 18, 2020 1:59 pm
Forum: Properties of Light
Topic: Word Problems
Replies: 7
Views: 27

Word Problems

When working out a problem how do you know if you are given the frequency or wavelength?
by America Alvarado
Fri Oct 16, 2020 1:19 pm
Forum: Properties of Light
Topic: first worked example
Replies: 3
Views: 38

Re: first worked example

I had the same question. Thank you for the help!
by America Alvarado
Sat Oct 10, 2020 11:28 pm
Forum: Empirical & Molecular Formulas
Topic: Sapling Week 1 #8
Replies: 23
Views: 193

Re: Sapling Week 1 #8

I have a follow up question. How would one know if there are double or triple bonds involved? If when writing the molecular formula we don't count the bonds?
by America Alvarado
Sat Oct 10, 2020 12:33 pm
Forum: Student Social/Study Group
Topic: Zoom Lectures
Replies: 11
Views: 94

Re: Zoom Lectures

This is off topic, but does anyone know how to make a new post? I have no idea and can't find the "New Topic" option.
by America Alvarado
Sat Oct 10, 2020 12:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Exam Regulations
Replies: 7
Views: 60

Re: Exam Regulations

On the syllabus it says that exams will be proctored and closed book.
by America Alvarado
Sat Oct 10, 2020 12:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4429

Re: Step Up Sessions

I know there are multiple step-up sessions in a day. Are they all the same or do they go over different things in each one?
by America Alvarado
Sat Oct 10, 2020 12:02 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 156
Views: 105656

Re: Reading the textbook [ENDORSED]

I have a quick question. I know that for other classes you can get away with just skimming through the texts, but I was wondering if for chem you guys literally read every page. I feel like it's so dense I don't even know where to start to take notes or what's important.

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