Search found 20 matches

by Brian Acevedo 3H
Sun Dec 13, 2020 10:14 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8795
Views: 1493536

Re: Post All Chemistry Jokes Here

Why did the acid go to the gym?

To become a buffer solution!
by Brian Acevedo 3H
Sat Dec 12, 2020 5:31 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: How many values of the quantum number l are possible when n = 7?
Replies: 3
Views: 45

Re: How many values of the quantum number l are possible when n = 7?

I have a feeling this question was designed more to test your understanding of how quantum numbers relate to one another as opposed to that of how tangible certain chemical phenomena would be. For that reason, I'd say stick with six because HYPOTHETICALLY, a case in which the principal quantum numbe...
by Brian Acevedo 3H
Sat Dec 12, 2020 5:22 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Ligands
Replies: 4
Views: 74

Re: Ligands

Are ligands specific to transition metals/metals or can they be applied to all elements? My understanding is the that the term "ligand" refer to any species that is bound to a metal by a coordinate bond. Because of this, I think it's fair to use the term ligand with an element bound to th...
by Brian Acevedo 3H
Sat Dec 12, 2020 5:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Electron Geometry
Replies: 8
Views: 71

Re: Electron Geometry

Molecular geometry takes into account electrons in bonding pairs, while electron geometry includes these in addition to lone pair electrons. It is for this reason that we use molecular geometry when describing the shape of a molecule.
by Brian Acevedo 3H
Sat Dec 12, 2020 4:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond angles
Replies: 12
Views: 109

Re: Bond angles

I think as long as we are familiar with the more common bond angles (i.e. 90, 109.5, 120 etc. as well as the associated shapres we should be alright.
by Brian Acevedo 3H
Thu Dec 10, 2020 10:34 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8795
Views: 1493536

Re: Post All Chemistry Jokes Here

If H2O is the formula for water, what is the formula for ice?

H2O CUBED!
by Brian Acevedo 3H
Thu Dec 10, 2020 10:25 pm
Forum: Trends in The Periodic Table
Topic: Finding Charge
Replies: 4
Views: 61

Re: Finding Charge

If I recall correctly, almost all of the transition metals would have a possible +2 charge because of the electron configuration and the s orbital of the energy level above that of the d orbitals (example: 4s for iron) filling in prior to the d-orbitals, thus allowing for those metals two form +2 ca...
by Brian Acevedo 3H
Thu Dec 10, 2020 10:18 pm
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 88
Views: 506

Re: Is c always the speed of light?

In the context of this class, the constant "c" will always refer to the speed of light, which is approximately 2.99792 x 108 meters per second.
by Brian Acevedo 3H
Thu Dec 10, 2020 10:14 pm
Forum: Significant Figures
Topic: 12/07 Lecture sig figs
Replies: 4
Views: 82

Re: 12/07 Lecture sig figs

I don't believe Dr. Lavelle would use this problem as an exception to the sig fig conventions we have been taught thus far. It's likely he misspoke and meant to say 3 sig figs.
by Brian Acevedo 3H
Thu Dec 10, 2020 10:10 pm
Forum: Balancing Chemical Reactions
Topic: Diatomic Molecules
Replies: 7
Views: 102

Re: Diatomic Molecules

The diatomic molecules are the molecular forms of hydrogen, nitrogen, fluorine, oxygen, iodine, chlorine, and bromine. A mnemonic I was taught to help remember them is: Have No Fear Of Ice Cold Beer.
by Brian Acevedo 3H
Thu Dec 10, 2020 10:05 pm
Forum: Limiting Reactant Calculations
Topic: Cl vs Cl2
Replies: 9
Views: 109

Re: Cl vs Cl2

Correct, Cl2 is used when referring to chlorine gas but Cl just refers to a chlorine atom.
by Brian Acevedo 3H
Tue Dec 08, 2020 11:01 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro constant
Replies: 16
Views: 187

Re: Avogadro constant

The vast majority of the applications of the constant are in problems relating to stoichiometry. The units for the constant (which is used to find number of atoms, as represented by N*subscript A* on the constants and equations sheet) are inverse moles. Therefore it is used when converting between t...
by Brian Acevedo 3H
Tue Dec 08, 2020 10:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8795
Views: 1493536

Re: Post All Chemistry Jokes Here

Why did the white bear dissolve in water?

Because it was a polar bear.
by Brian Acevedo 3H
Tue Dec 08, 2020 10:46 pm
Forum: Trends in The Periodic Table
Topic: dissociation energy
Replies: 3
Views: 39

Re: dissociation energy

The dissociation energy of a particular bond will typically increase when the difference in the electronegativities of the atoms involved in the bond increases. As far as dissociation energy relative to a singular atom's electronegativity, I'm not sure if there's much that can be said unless the typ...
by Brian Acevedo 3H
Tue Dec 08, 2020 10:39 pm
Forum: Properties of Light
Topic: Frequency and amplitude
Replies: 7
Views: 72

Re: Frequency and amplitude

I like to use the analogy of an image in a word document (of the wave in question, if it helps) so as to better understand how changes in one parameter will affect the others related to the same wave. For example, you can think of changes in amplitude to be like strecthing or shrinking the vertical ...
by Brian Acevedo 3H
Tue Dec 08, 2020 7:49 pm
Forum: SI Units, Unit Conversions
Topic: How to memorize prefixes
Replies: 22
Views: 236

Re: How to memorize prefixes

On a separate note, if you're worried about prefix memorization for the sake of doing well on one of the exams, I wouldn't worry to much. On the constants and equations sheet on Dr. Lavelle's website, all of the units that are likely to appear on an exam are listed as a measure of the base unit, alb...
by Brian Acevedo 3H
Tue Dec 08, 2020 7:42 pm
Forum: SI Units, Unit Conversions
Topic: How to memorize prefixes
Replies: 22
Views: 236

Re: How to memorize prefixes

This may not be overly specific, but whenever looking at a prefix I'm unsure of, then I try to think of another word I know already that effectively contains the same prefix. For example, I know that a CENTury is a period of 100 years, so I can assume that a unit with the prefix centi- will relate t...
by Brian Acevedo 3H
Tue Dec 08, 2020 7:34 pm
Forum: Significant Figures
Topic: sig fig
Replies: 20
Views: 187

Re: sig fig

Will sig figs be important on the final? This is entirely speculative, but I have a feeling that sig figs will be important in any calculation problem where we are given some of the values used during calculation. I would imagine there's a little more leeway with respect to values coming from the p...
by Brian Acevedo 3H
Mon Dec 07, 2020 2:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Unable to view the lectures
Replies: 12
Views: 142

Re: Unable to view the lectures

I had a similar issue. I tried using several different device, browser, and connection combinations and still wasn't able to view today's lecture properly. The closest I got was using a PC connected to ethernet, but even then the lecture video had no audio. This could just be a problem with the uplo...
by Brian Acevedo 3H
Tue Dec 01, 2020 7:52 pm
Forum: Student Social/Study Group
Topic: Big Sad: Midterm 2
Replies: 86
Views: 951

Re: Big Sad: Midterm 2

As someone who performed poorly on midterm 2 especially in comparison to midterm 1, I totally understand the concerns associated with a less than ideal midterm performance. However, speaking also as someone who has recovered from some fairly worrying preliminary grades in the past, know that it is s...

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