Search found 30 matches

by Areli C 3L
Mon Nov 11, 2019 6:00 am
Forum: Bond Lengths & Energies
Topic: Size
Replies: 9
Views: 20

Re: Size

Does bond length also affect how strong the bond is? As Serena Siddiq said "The larger the radius of the atoms, the farther each of their centers are apart, and therefore, [they have a longer and weaker bond length than smaller radius atoms]. The smaller the radius of the atoms, the closer the...
by Areli C 3L
Mon Nov 11, 2019 5:56 am
Forum: Dipole Moments
Topic: Hydrogen bonds
Replies: 3
Views: 5

Re: Hydrogen bonds

From my understanding just those 3
by Areli C 3L
Tue Nov 05, 2019 6:36 pm
Forum: Properties of Light
Topic: Midterm formulas
Replies: 6
Views: 56

Re: Midterm formulas

yes ma'am :)
by Areli C 3L
Tue Nov 05, 2019 4:54 pm
Forum: DeBroglie Equation
Topic: Midterm Practice 4B
Replies: 2
Views: 34

Re: Midterm Practice 4B

So first you have to use De Broglie's equation to solve for velocity since you can't just use the speed of light equation because the wavelength given is for an electron and not light. Then you would just use the photoelectric effect equation and plug in the values for work function and kinetic ene...
by Areli C 3L
Tue Nov 05, 2019 2:20 pm
Forum: DeBroglie Equation
Topic: Midterm Practice 4B
Replies: 2
Views: 34

Midterm Practice 4B

8. b) A newly designed laser pointer with a certain frequency is pointed at a sodium metal surface. An electron is ejected from the metal surface with wavelength of 1.10 nm. What is the frequency of the light from the laser pointer? The work function of sodium is 150.6 kJ∙mol-1. I am getting lost on...
by Areli C 3L
Sun Nov 03, 2019 7:43 pm
Forum: Electronegativity
Topic: electronegativity trend
Replies: 9
Views: 26

Re: electronegativity trend

The larger the shell gets the lower electronegativity the element will have because that larger outer shell's electron is a lot farther from the nucleus.
by Areli C 3L
Sun Nov 03, 2019 7:39 pm
Forum: Electronegativity
Topic: Identifying the central atom
Replies: 3
Views: 17

Re: Identifying the central atom

Yuri Lin 4H wrote:I think the rule of thumb is that the central atom is the least electronegative atom, not the one with the lowest ionization energy, though I might be wrong. Nitrogen has a lower electronegativity than oxygen, so it would be the central atom.


Thank you! I too was puzzled.
by Areli C 3L
Sun Nov 03, 2019 7:26 pm
Forum: Octet Exceptions
Topic: Radical
Replies: 6
Views: 19

Re: Radical

Basically they are highly reactive because they are desperately trying to gain a complete octet, so theyd try to grab it from anywhere.
by Areli C 3L
Sun Nov 03, 2019 7:24 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 5
Views: 19

Re: Drawing Lewis Structures

When you draw a lewis structure you have to pay special attention to the valence electrons in each atom; they help determine if there are single/double/triple bonds. There is normally a center atom, and that is normally the atom that has the lowest ionization energy. For bonds (when the molecule is...
by Areli C 3L
Sun Nov 03, 2019 7:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Bruincast
Replies: 4
Views: 37

Re: Bruincast

I've also looked into that but came back empty. :( As the others have said we only have the Video modules that show us past lectures of very similar (if not the same) problems from class itself.
by Areli C 3L
Sun Oct 27, 2019 8:27 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 127
Views: 74904

Re: Reading the textbook [ENDORSED]

I've definitely have been in your shoes before. If the reading feels a intimidating, you should watch some youtube videos first about the concept so you won't go in blind. After that, as you go back to the reading it will feel more familiar and less intimidating!
by Areli C 3L
Sun Oct 27, 2019 8:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 139
Views: 83811

Re: Advice from a Medical Student [ENDORSED]

Thank you so much! This was quite insightful
by Areli C 3L
Sun Oct 27, 2019 2:54 pm
Forum: Lewis Structures
Topic: Drawing the structure
Replies: 7
Views: 30

Re: Drawing the structure

Just be sure to know which elements are able to expand their octet so it doesn't mess up your lewis structure or cause confusion.
by Areli C 3L
Sun Oct 27, 2019 2:50 pm
Forum: Lewis Structures
Topic: Anion/Cations
Replies: 2
Views: 19

Re: Anion/Cations

Adding on to what the post above me said, I believe Usually it is denoted by brackets and then the charge is placed at the top right corner. If it has a 2+ charge then its be a cation and vice versa.
by Areli C 3L
Sun Oct 20, 2019 8:45 pm
Forum: Photoelectric Effect
Topic: Speed of Light
Replies: 29
Views: 107

Re: Speed of Light

Yes, it is a constant. Some prefer to write it as 3.00x10^8 or 2.998x10^8 believe it or not sometimes, depending on which one you use, it can change your answer slightly. So for accuracy try to use the 2.998x10^8. Then your final answer should be in the appropriate Sig figs :)
by Areli C 3L
Sun Oct 20, 2019 8:40 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 61
Views: 18355

Re: Final Jitters

I try to prepare myself as much as possible, and try to get some sleep! Sleep is super important, or try to get little naps here and there so you don't feel like you're lacking.
(lord knows anxiety is a sleep killer).
by Areli C 3L
Sun Oct 20, 2019 8:34 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 1711

Re: Test 1 [ENDORSED]

I can't find my test grades on ccle, where do I go? I had the same problem, you should try to check your discussion section or go talk to your discussion TA if that doesn't work. I thought TA's were supposed to give our tests back, but the score itself isn't necessarily the grade we got because of ...
by Areli C 3L
Wed Oct 16, 2019 12:31 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Question regarding definition of molecules
Replies: 5
Views: 24

Re: Question regarding definition of molecules

From my understanding, Avogadro's Number can be used to find Atoms, Molecules and Formula units of a compound. :)
by Areli C 3L
Wed Oct 16, 2019 12:28 pm
Forum: SI Units, Unit Conversions
Topic: Chemistry Grades
Replies: 4
Views: 24

Re: Chemistry Grades

As everyone else had mentioned, my TA also has only inputted homework assignments so far. Hopefully soon though!
by Areli C 3L
Fri Oct 11, 2019 9:58 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1012105

Re: Chemistry Jokes

If H20 is water, what is H204? Drinking, bathing, washing, swimming, etc. If H2O is the formula for water, what is the formula for ice? H2O cubed. Anyone know any jokes about the element sodium? Na. Have been trying to figure out the first joke for almost a year and I can't figure out lmao Hahah it...
by Areli C 3L
Fri Oct 11, 2019 9:53 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1012105

Re: Chemistry Jokes

Shreyesi Srivastava 2D wrote:Do you have 11 protons?
Cause you sodium fine

How have I never heard this one! HAHAh! :')
by Areli C 3L
Fri Oct 11, 2019 9:46 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Wrong Textbook
Replies: 12
Views: 96

Re: Wrong Textbook

I have the 7th edition PDF if you want to use that one. I know some prefer the physical book, but that's expensive. Send me a Pm if you're interested, I'll gladly share it :)
by Areli C 3L
Fri Oct 11, 2019 9:27 am
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Reactions
Replies: 20
Views: 130

Re: Balancing Chemical Reactions

Jarrett Peyrefitte 1L wrote:Try to make a list of reactants and products with their respective number of molecules and balance it one by one.

Yes! This simple list helps with confusion and knowing how much of what is on each side. I highly recommend this. :)
by Areli C 3L
Fri Oct 11, 2019 9:23 am
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 209
Views: 97954

Re: Saying Thank You to Dr. Lavelle

Speaking as someone who has taken 14A before and didn't do so well, Dr. Lavelle you really make these concepts so interesting and easy to understand. Your passion seeps through every lecture making your students feel as passionate to learn as you are to teach! Truly a one-of-a-kind professor :)
by Areli C 3L
Fri Oct 11, 2019 9:19 am
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 139
Views: 83811

Re: Advice from a Medical Student [ENDORSED]

Wow, this is very helpful. Thank you :)
by Areli C 3L
Fri Oct 11, 2019 9:17 am
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 66
Views: 853

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]

I think it would be best to show your work how you learned it rather than confusing yourself by adding minor steps. However, the minor steps might help you receive partial credit if your answer is incorrect. :)
by Areli C 3L
Thu Oct 03, 2019 7:23 pm
Forum: Balancing Chemical Reactions
Topic: Understanding how to get whole #s [ENDORSED]
Replies: 18
Views: 127

Re: Understanding how to get whole #s [ENDORSED]

From what I've been reading on the forums, our final answer should always be in the correct number of significant figures in order to be concise. So if the fewest number of sig figs in the problem was 4 then your final answer should contain only 4 sig figs.
by Areli C 3L
Thu Oct 03, 2019 7:19 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 6
Views: 60

Re: Sig Figs

Can we round to the least amount of sig figs that are allowed for each step in our calculation? So basically round at each calculation to 2,3 sig figs?
by Areli C 3L
Thu Oct 03, 2019 7:13 pm
Forum: SI Units, Unit Conversions
Topic: Formula Names
Replies: 7
Views: 51

Re: Formula Names

I would agree with everyone else, prefixes and suffixes are important to remember as it will also help you write out formula names given only the chemical formula. I'm pretty sure they'll give us a list of chemicals they'd want us to remember for the exam and maybe try to write the names of others i...
by Areli C 3L
Thu Oct 03, 2019 7:01 pm
Forum: SI Units, Unit Conversions
Topic: mol, g.mol and g.mol-1
Replies: 12
Views: 121

Re: mol, g.mol and g.mol-1

From what I've seen so far, grams/mole is equal to g.mol-1. Lavelle prefers us to write it as the latter since it makes canceling units simpler. I haven't seen g.mols though, so I wouldn't be able to explain the difference.

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