Search found 30 matches

by Caitlyn Ponce 1L
Mon Jun 11, 2018 10:24 pm
Forum: Lewis Structures
Topic: Lowest energy lewis structure
Replies: 5
Views: 1334

Re: Lowest energy lewis structure

The Lewis structure with the lowest energy will be the one with the lowest formal charge overall. Also, if the individual atoms have formal charges not equal to zero, its best to put opposite charges next to one another.
by Caitlyn Ponce 1L
Mon Jun 11, 2018 10:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1017164

Re: Post All Chemistry Jokes Here

Why did the noble gas cry?
Cause all its friends Argon. i can relate tbh
by Caitlyn Ponce 1L
Mon Jun 11, 2018 9:52 pm
Forum: General Science Questions
Topic: Bond angles
Replies: 4
Views: 374

Re: Bond angles

To be honest, I think it would be a good idea to try and memorize all of the bond angles of the molecular shapes just to be safe.
by Caitlyn Ponce 1L
Sun Jun 03, 2018 9:04 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular shape
Replies: 3
Views: 136

Re: Molecular shape

To help with visualization, you should look at the Lewis structure first to determine the areas of electron density. Then, you can determine the molecular structure based on the number of these areas.
We do need to know the names by memory since they will not be given on the exam (TA mentioned this).
by Caitlyn Ponce 1L
Sun Jun 03, 2018 8:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1017164

Re: Post All Chemistry Jokes Here

I hate learning about electrons. I always get so Bohr'd :))))
by Caitlyn Ponce 1L
Fri Jun 01, 2018 3:52 pm
Forum: Hybridization
Topic: σ bonds
Replies: 9
Views: 274

Re: σ bonds

Single bond: one sigma bond
Double bond: one sigma and one pi bond
Triple bond: one sigma and two pi bonds
by Caitlyn Ponce 1L
Mon May 28, 2018 2:46 am
Forum: Lewis Structures
Topic: Lone pair arrangement
Replies: 4
Views: 180

Re: Lone pair arrangement

I remember my TA saying that the arrangement of lone pairs on an atom does not really matter during discussion a few weeks back.
by Caitlyn Ponce 1L
Mon May 28, 2018 2:38 am
Forum: Resonance Structures
Topic: Resonance [ENDORSED]
Replies: 5
Views: 323

Re: Resonance [ENDORSED]

I think it usually refers to the resonance structure that has the lowest formal charge overall or has opposite individual formal charges near one another.
by Caitlyn Ponce 1L
Mon May 28, 2018 2:32 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1017164

Re: Post All Chemistry Jokes Here

You're the photon to my valence electron. You excite me to another level ;)
by Caitlyn Ponce 1L
Sun May 20, 2018 10:15 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 3
Views: 208

Re: Sig Figs

I think a short overview of Sig Fig rules are posted on the class website under the Math Assistance section.
by Caitlyn Ponce 1L
Sun May 20, 2018 10:12 pm
Forum: Lewis Structures
Topic: Formal Charge
Replies: 4
Views: 161

Re: Formal Charge

I just count the number of valence electrons the element has and subtract that with the number of lone electrons (dots) and bonds (lines) associated with it.
by Caitlyn Ponce 1L
Sun May 20, 2018 10:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1017164

Re: Post All Chemistry Jokes Here

Are you made of Oxygen and Neon? Cause I think you're the ONe
:/
by Caitlyn Ponce 1L
Sun May 13, 2018 9:09 pm
Forum: Formal Charge and Oxidation Numbers
Topic: formal charge equation
Replies: 3
Views: 191

Re: formal charge equation

Formal charge can be used to double check your Lewis Structures for both neutral and charged molecules. The closer the formula charge is to 0, the more stable the molecule will be. In the case of charged molecules, some individual atoms will not have a formal charge of 0. It is advised to always che...
by Caitlyn Ponce 1L
Sun May 13, 2018 8:47 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge purpose
Replies: 40
Views: 1450

Re: Formal charge purpose

Formal charge can also be used to check if your Lewis Structure is correct for charged molecules.
by Caitlyn Ponce 1L
Sun May 13, 2018 8:39 pm
Forum: Lewis Structures
Topic: Order of Dots
Replies: 11
Views: 407

Re: Order of Dots

During last week's discussion, my TA said that there's not really a specific way to fill electrons in Lewis structures.
by Caitlyn Ponce 1L
Sun May 06, 2018 6:37 pm
Forum: Limiting Reactant Calculations
Topic: Test #1 Question 6 Part B [ENDORSED]
Replies: 2
Views: 272

Re: Test #1 Question 6 Part B [ENDORSED]

Since O2 is the limiting reactant, that means that CO is in excess. To calculate the mass of reactant leftover, you can subtract the moles of CO present in the reaction with the moles of CO required to react with 100g O2. Then convert the moles to grams.
by Caitlyn Ponce 1L
Sun May 06, 2018 6:22 pm
Forum: Photoelectric Effect
Topic: Test #2 Question 7 [ENDORSED]
Replies: 2
Views: 185

Re: Test #2 Question 7 [ENDORSED]

Whenever the maximum wavelength of light is asked for, the kinetic energy of the ejected electrons will equal zero (the incoming light just meets the requirement of the work function). In this question, the work function is equal to the energy of the incoming light. To get the answer, plug the energ...
by Caitlyn Ponce 1L
Sun May 06, 2018 6:08 pm
Forum: Properties of Light
Topic: The visible spectrum
Replies: 4
Views: 227

Re: The visible spectrum

A continuous spectrum has wavelengths with no gaps in between. For example, when white light is shone through a prism, a rainbow (all wavelengths of visible radiation) is seen. On the other hand, a line spectrum consists of spectral lines that appear from the transition between two allowed energies.
by Caitlyn Ponce 1L
Sat Apr 28, 2018 9:13 pm
Forum: Properties of Light
Topic: photoelectric effect
Replies: 4
Views: 153

Re: photoelectric effect

During the experiment, if the incoming light does not have enough energy to match the work function of the corresponding metal, no electrons will be ejected. However, even when increasing the intensity of light, electrons in the experiment were still not being ejected.
by Caitlyn Ponce 1L
Sat Apr 28, 2018 8:24 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1017164

Re: Post All Chemistry Jokes Here

Are you made up of copper and tellurium? Cause you're really CuTe wow
by Caitlyn Ponce 1L
Sat Apr 21, 2018 1:46 pm
Forum: General Science Questions
Topic: Test #2 [ENDORSED]
Replies: 6
Views: 445

Re: Test #2 [ENDORSED]

We'll probably have the same number of questions as test 1 on this upcoming one. I don't think all of them will require calculations though. Some questions might just test on qualitative understanding of the topics.
by Caitlyn Ponce 1L
Sat Apr 21, 2018 1:43 pm
Forum: Properties of Light
Topic: test 2
Replies: 18
Views: 591

Re: test 2

Since this week's discussion worksheet included qualitative questions about the topics, I would say that we are most likely to have some on test 2.
by Caitlyn Ponce 1L
Thu Apr 19, 2018 10:36 pm
Forum: Properties of Light
Topic: Part B on HW 1.25
Replies: 1
Views: 78

Re: Part B on HW 1.25

First, convert 5.00 mg to moles. After that, multiply the moles with Avogadro's constant and the energy value you calculated from part a.
by Caitlyn Ponce 1L
Mon Apr 16, 2018 9:28 pm
Forum: Properties of Light
Topic: 1.13 (b)
Replies: 6
Views: 220

Re: 1.13 (b)

I think you should double check your answer. Like the previous person said, I believe the answer is 4.86x10^-7 m and it would correspond with the Balmer series.
by Caitlyn Ponce 1L
Fri Apr 13, 2018 12:38 am
Forum: Molarity, Solutions, Dilutions
Topic: Review worksheet week 1: question 9 [ENDORSED]
Replies: 4
Views: 235

Re: Review worksheet week 1: question 9 [ENDORSED]

As a side note, always make sure that the equation is balanced. In this problem, the given chemical equation is already balanced, but for future exercises, check in case so you can have the correct stoichiometric ratios :)
by Caitlyn Ponce 1L
Thu Apr 12, 2018 8:35 pm
Forum: Properties of Light
Topic: HW 1.5 [ENDORSED]
Replies: 7
Views: 292

Re: HW 1.5 [ENDORSED]

I also had the same question. X-rays and gamma rays have identical information in the previously mentioned table and I'm not sure how to differentiate the two.
by Caitlyn Ponce 1L
Thu Apr 12, 2018 10:30 am
Forum: Limiting Reactant Calculations
Topic: M9
Replies: 2
Views: 114

Re: M9

Net ionic equations do not include spectator ions (these ions are present in the reaction, but do not participate in it). You can find spectator ions by looking for ions that are in the same state and number on both sides of the equation, basically they remain unchanged throughout the reaction.
by Caitlyn Ponce 1L
Wed Apr 11, 2018 10:57 pm
Forum: Limiting Reactant Calculations
Topic: What is the mass of AgCl produced?
Replies: 10
Views: 2756

Re: What is the mass of AgCl produced?

In order to get the mass of AgCl, you have to multiply the produced moles of AgCl, which is 0.012 moles, with the molar mass of AgCl, which is 143.32 g/mol. In doing so, the answer will be 1.72 g AgCl. I think you got mixed up and used AgNO3 instead, but the question is asking for the mass of AgCl. ...
by Caitlyn Ponce 1L
Wed Apr 11, 2018 6:24 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular to Empirical [ENDORSED]
Replies: 12
Views: 491

Re: Molecular to Empirical [ENDORSED]

Molecular formulas are multiples of empirical formulas. In order to get the empirical formula from the molecular formula, you need to reduce the molecular formula to its simplest whole number ratio of atoms. For example, butane has the molecular formula C4H10. We divide by 2 to reduce it and the res...
by Caitlyn Ponce 1L
Wed Apr 11, 2018 3:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 1 Lab Worksheet
Replies: 2
Views: 219

Week 1 Lab Worksheet

Will solutions of the worksheet we did in week 1 lab be posted? If they are already posted, can someone explain where I can access them?

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