CHEMISTRY COMMUNITY

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

Why did the noble gas cry?
Cause all its friends Argon. i can relate tbh

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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).

Caitlyn Ponce 1L

I hate learning about electrons. I always get so Bohr'd :))))

Caitlyn Ponce 1L

Single bond: one sigma bond
Double bond: one sigma and one pi bond
Triple bond: one sigma and two pi bonds

Caitlyn Ponce 1L

I remember my TA saying that the arrangement of lone pairs on an atom does not really matter during discussion a few weeks back.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

You're the photon to my valence electron. You excite me to another level ;)

Caitlyn Ponce 1L

I think a short overview of Sig Fig rules are posted on the class website under the Math Assistance section.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

Are you made of Oxygen and Neon? Cause I think you're the ONe
:/

Caitlyn Ponce 1L

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...

Caitlyn Ponce 1L

Formal charge can also be used to check if your Lewis Structure is correct for charged molecules.

Caitlyn Ponce 1L

During last week's discussion, my TA said that there's not really a specific way to fill electrons in Lewis structures.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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...

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

Are you made up of copper and tellurium? Cause you're really CuTe wow

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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 :)

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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.

Caitlyn Ponce 1L

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. ...

Caitlyn Ponce 1L

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...

Caitlyn Ponce 1L

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?

CHEMISTRY COMMUNITY

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Re: Lowest energy lewis structure

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Week 1 Lab Worksheet