Search found 91 matches

by Jaden Ward 3J
Fri Feb 19, 2021 5:17 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Q: What is the name of 007's Eskimo cousin?
A: Polar Bond.
by Jaden Ward 3J
Fri Feb 19, 2021 5:16 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

If you're not part of the solution, you're part of the precipitate.
by Jaden Ward 3J
Fri Feb 19, 2021 5:16 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Q: If H20 is water, what is H204?
A: Drinking, bathing, washing, swimming, etc.
by Jaden Ward 3J
Fri Feb 19, 2021 5:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Q: What is the show cesium and iodine love watching together?
A: CSI
by Jaden Ward 3J
Fri Feb 19, 2021 5:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Did you know that you can cool yourself to -273.15˚C and still be 0k?
by Jaden Ward 3J
Thu Feb 11, 2021 12:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

What do you say when: oxygen, hydrogen, sulfur, sodium and phosphorous walk into a bar? OH SNaP!
by Jaden Ward 3J
Thu Feb 11, 2021 12:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

What do you do to dead elements? You barium.
by Jaden Ward 3J
Thu Feb 11, 2021 12:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Enthalpy Pirate: He'll steal your joules.
by Jaden Ward 3J
Thu Feb 11, 2021 12:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Did you hear about the man who got cooled to absolute zero? He's 0K.
by Jaden Ward 3J
Thu Feb 11, 2021 12:46 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Exothermic Reactions? I studied them before they were cool.
by Jaden Ward 3J
Sun Feb 07, 2021 8:05 pm
Forum: Student Social/Study Group
Topic: Any cool clubs?
Replies: 12
Views: 69

Re: Any cool clubs?

DIG club is super fun! It's about gardening and such and I love it!
by Jaden Ward 3J
Sun Feb 07, 2021 8:04 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: converting T to kelvin
Replies: 46
Views: 480

Re: converting T to kelvin

I think it depends on the problem, but if you're doing calculations involving T then I would convert it to Kelvin.
by Jaden Ward 3J
Sun Feb 07, 2021 8:03 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Sapling Question 18
Replies: 9
Views: 75

Re: Sapling Question 18

Work is only not accounted for in calculating deltaU when we have a constant volume (because no expansion work is done). Because this problem involves a constant pressure (as opposed to constant volume), volume can change and thus we have to account for both q and w in calculating deltaU. Here are ...
by Jaden Ward 3J
Sun Feb 07, 2021 8:02 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Sapling Question 18
Replies: 9
Views: 75

Re: Sapling Question 18

Adalia 3E wrote:How are we supposed to know the constant-volume molar specific heat? Are we supposed to memorize that?



I don't think we need to memorize it, I think it would be given relative to the problem.
by Jaden Ward 3J
Sun Feb 07, 2021 8:01 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Sapling Question 14
Replies: 2
Views: 33

Sapling Question 14

A sample of an ideal gas in a cylinder of volume 2.52 L at 298 K and 2.42 atm expands to 8.53 L by two different pathways. Path A is an isothermal, reversible expansion. Path B has two steps. In the first step, the gas is cooled at constant volume to 1.45 atm . In the second step, the gas is heated ...
by Jaden Ward 3J
Fri Feb 05, 2021 2:33 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Sapling Question 18
Replies: 9
Views: 75

Sapling Question 18

A 0.305 mol sample of Ar(g), initially at 298 K and 1.00 atm, is held at constant pressure while enough heat is applied to raise the temperature of the gas by 11.5 K. Calculate the amount of heat qq required to bring about this temperature change, and find the corresponding total change in the inter...
by Jaden Ward 3J
Fri Feb 05, 2021 2:09 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Sapling Question 10
Replies: 3
Views: 33

Sapling Question 10

An ice cube with a mass of 53.8 g at 0.0 ∘C is added to a glass containing 391 g of water at 45.0 ∘C . Determine the final temperature of the system at equilibrium. The specific heat capacity of water, C s , is 4.184 J/g⋅∘C , and the standard enthalpy of fusion, ΔH∘fus , of water is 6.01×103 J/mol ....
by Jaden Ward 3J
Sat Jan 30, 2021 12:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

What did one charged atom say to the other?
I got my ion you.
by Jaden Ward 3J
Sat Jan 30, 2021 12:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much?
They are cheaper than day rates.
by Jaden Ward 3J
Sat Jan 30, 2021 12:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

What did the chemist say when there was an explosion in the lab?
Oxidants happen.
by Jaden Ward 3J
Sat Jan 30, 2021 12:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why was the DJ called DJ Enzyme?
He was always breaking it down.
by Jaden Ward 3J
Sat Jan 30, 2021 11:59 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

What did the cat say after drinking methanol?
MeOH MeOH
by Jaden Ward 3J
Sun Jan 24, 2021 6:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Ion Riddle
What did one charged atom say to the other? I've got my ion you.
by Jaden Ward 3J
Sun Jan 24, 2021 6:11 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Dental Chemistry Riddle
What do you call a tooth in a glass of water? A one molar solution.
by Jaden Ward 3J
Sun Jan 24, 2021 6:11 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

So engineering school is really hard...
I'm not doing so hot in thermodynamics.
by Jaden Ward 3J
Sun Jan 24, 2021 6:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why are physicists still considered "not" cool...
When Thermodynamic entropy is getting cooler all the time?
by Jaden Ward 3J
Sun Jan 24, 2021 6:05 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Question 2
Replies: 6
Views: 41

Sapling Question 2

The Ka of a monoprotic weak acid is 0.00474. What is the percent ionization of a 0.159 M solution of this acid?

please help me find the percent ionization, thank you!
by Jaden Ward 3J
Sun Jan 24, 2021 6:04 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Question 3
Replies: 8
Views: 77

Sapling Question 3

Muscles produce lactic acid, CH3CH(OH)COOH(aq) , during exercise. Calculate the percent ionization (deprotonation), pH, and pOH of a 0.1024 M solution of lactic acid. The acid‑dissociation (or ionization) constant, Ka , of this acid is 8.40×10−4 . can someone please help me find the poh, ph, and per...
by Jaden Ward 3J
Thu Jan 14, 2021 4:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

I’ve been informed that jokes about acids are a waste of time.
They say that basic jokes have a higher potential.
by Jaden Ward 3J
Thu Jan 14, 2021 4:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why would the military use acid?
To neutralize the enemy base.
by Jaden Ward 3J
Thu Jan 14, 2021 4:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

My Mom said to stop drinking soda because it has acid in it.
I replied," Stop making such baseless accusations".
by Jaden Ward 3J
Tue Jan 12, 2021 7:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Module Question 19 [ENDORSED]
Replies: 3
Views: 36

Module Question 19 [ENDORSED]

19. 0.482 mol N2 and 0.933 mol O2 are placed in a 10.0 L reaction vessel and form N2O (dinitrogen oxide): 2N2(g) + O2(g) ⇌ 2N2O(g) KC = 2.0 x 10-37 What is the composition of the equilibrium mixture? A. [N2] = 0.0482 mol.L-1; [O2] = 0.0933 mol.L-1; [N2O] = 6.6 x 10-21 mol.L-1 B. [N2] = 0.0933 mol.L-...
by Jaden Ward 3J
Tue Jan 12, 2021 7:48 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Module Question 18
Replies: 3
Views: 18

Module Question 18

18. A vial of SO2 (0.522 mol.L-1) and O2 (0.633 mol.L-1) react and reach equilibrium. Calculate the equilibrium concentrations of the products and reactants given that KC = 5.66 x 10-10 for this reaction: 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g) concentration SO2 O2 SO3 Initial 0.522 0.633 0 change -2x -x +2x...
by Jaden Ward 3J
Sun Jan 10, 2021 4:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Module Question 13
Replies: 2
Views: 19

Module Question 13

12. Consider the following reaction at 1200 K, for which you know Kc = 1.7 x 10-3. Br2 (g) ⇌ 2 Br (g) Your experimental setup is able to measure the equilibrium concentration of Br2 based on its color, but you are unable to measure the concentration of Br directly. If you measure at equilibrium [Br2...
by Jaden Ward 3J
Wed Jan 06, 2021 8:13 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 1B Module Question 15
Replies: 1
Views: 37

1B Module Question 15

15. Carbonyl chloride (COCl2 ), also called phosgene, was used in World War I as a poisonous gas. The equilibrium concentrations for the reaction between carbon monoxide and molecular chlorine to form carbonyl chloride at 74℃ are [CO] = 1.2 x 10-2 M, [Cl2 ] = 0.054 M, and [COCl2 ] = 0.14 M. Calculat...
by Jaden Ward 3J
Wed Jan 06, 2021 7:31 pm
Forum: Ideal Gases
Topic: PV=nRT question
Replies: 6
Views: 81

PV=nRT question

When do we know to convert between partial pressure and concentration for a gas?
by Jaden Ward 3J
Tue Jan 05, 2021 6:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chemical Equilibrium 1A Question 19
Replies: 3
Views: 30

Chemical Equilibrium 1A Question 19

19. For a balanced chemical equation with different stoichiometric coefficients, what is the simplest expression for the equilibrium constant? A. The ratio of the equilibrium concentrations of products to the equilibrium concentrations of reactants, all raised to the power of their respective stoich...
by Jaden Ward 3J
Tue Jan 05, 2021 6:17 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chemical Equilibrium 1A Question 18
Replies: 3
Views: 42

Chemical Equilibrium 1A Question 18

18. For a balanced chemical equation with all stoichiometric coefficients equal to one, what is the simplest expression for the equilibrium constant? A. The ratio of the equilibrium concentrations of reactants to the equilibrium concentrations of products. B. The ratio of the equilibrium concentrati...
by Jaden Ward 3J
Sat Dec 12, 2020 1:26 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

even though coffee is more acidic, all Starbucks coffee products have a pH of 14
Extremely basic
by Jaden Ward 3J
Sat Dec 12, 2020 1:26 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

A man was arrested last night for drinking battery acid.
Later he was charged.
by Jaden Ward 3J
Thu Dec 10, 2020 9:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Textbook 2E Section
Replies: 2
Views: 34

Textbook 2E Section

Hi am I the only one that has an issue with the textbook section 2E and the problems loading? It says (a) (b) (c) (d) but the rest of the problem just isn't there
by Jaden Ward 3J
Wed Dec 09, 2020 6:02 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Question
Replies: 6
Views: 90

Final Question

Does anyone know how much of acid and bases is going to be on the final because he keeps mentioning how what we're learning is what we're going to be going over in Chem 14B. Thank you in advance
by Jaden Ward 3J
Wed Dec 09, 2020 2:23 am
Forum: Hybridization
Topic: Textbook Question 2.57
Replies: 2
Views: 43

Textbook Question 2.57

The Atkins answer key doesn't have the answer for this specific problem, so I want to double check my answer 2.57 Acetonitrile, CH 3 CN , is used as a solvent in the pharmaceutical industry. Describe the structure of the CH 3 CN molecule in terms of hybrid orbitals, bond angles, and σ- and π-bonds. ...
by Jaden Ward 3J
Sat Dec 05, 2020 5:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

I think these jokes are sodium funny. In fact, I slapped my neon that one!
by Jaden Ward 3J
Sat Dec 05, 2020 5:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Carbon and hydrogen went on a date. I heard they really bonded.
by Jaden Ward 3J
Sat Dec 05, 2020 5:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much? They're cheaper than day rates!
by Jaden Ward 3J
Sat Dec 05, 2020 5:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why did the white bear dissolve in water? Because it was polar!
by Jaden Ward 3J
Sat Dec 05, 2020 5:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1488946

Re: Post All Chemistry Jokes Here

Why does a hamburger have less energy than steak? Because it's in the ground state!
by Jaden Ward 3J
Fri Nov 27, 2020 4:34 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Structure
Replies: 3
Views: 59

Re: Structure

They're helpful when you're illustrating a molecule as a 2D figure. The dashed lines are the atoms that are facing away from you and the solid wedges represent the atoms going towards you.
by Jaden Ward 3J
Fri Nov 27, 2020 4:29 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 6
Views: 63

Re: Ligands

Ligands aren't the central atoms, they're what bonds to the central ion by donating electrons.
by Jaden Ward 3J
Fri Nov 27, 2020 4:27 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Clarification on ligands
Replies: 6
Views: 78

Re: Clarification on ligands

Siwa Hwang 3G wrote:Is there a difference between ligands and Lewis base?

First off, hi Siwa! Secondly, no, I think ligands *are* Lewis bases if I'm not mistaken.
by Jaden Ward 3J
Fri Nov 27, 2020 4:25 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: TM "Octet"
Replies: 4
Views: 48

Re: TM "Octet"

I dont think so, I believe that the expanded octet only applies to the elements with s and p orbitals.
by Jaden Ward 3J
Fri Nov 27, 2020 4:21 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number
Replies: 13
Views: 119

Re: coordination number

It would be six because the coordinate number is proportional to the number of bonds. also note, if there is a double or a triple bond, you count those as 2 or 3 respectively.
by Jaden Ward 3J
Mon Nov 23, 2020 4:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Carbon Double Bond
Replies: 4
Views: 65

Re: Carbon Double Bond

Hi, So in a double bond there is 1 sigma bond that reacts end to end with another orbital and the second bond in the double bond is a pi bond that reacts side to side. If you remember from lecture, he made a diagram with his hands. His hands were the p-orbitals and the markers were the section they...
by Jaden Ward 3J
Mon Nov 23, 2020 4:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Carbon Double Bond
Replies: 4
Views: 65

Carbon Double Bond

Relating to the example he gave us in the beginning of the lecture on friday, where he drew the nonpolar molecule, why is the carbon double bond unable to be rotated? and does this go for the carbon double bond in the polar molecule too? Also, is this something I should know or was it just relative ...
by Jaden Ward 3J
Sat Nov 21, 2020 5:47 pm
Forum: Student Social/Study Group
Topic: Lavelle's Jokes
Replies: 18
Views: 240

Re: Lavelle's Jokes

I really appreciated Dr. Lavelle's joke about water on "Mars" the other day. Kudos to him. He always starts and ends his lectures in the best way, with music and jokes. Anyways here is a pretty cheesy one: Anyone know a joke about sodium bromate? NaBrO Same, I know that lecture was a litt...
by Jaden Ward 3J
Sat Nov 21, 2020 5:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle
Replies: 9
Views: 64

Re: Bond Angle

Bond angles are dependent on which atoms are in the molecule. Since the VSPEPR model predicts qualitatively and not quantitively, we are unable to figure out the exact measure.
by Jaden Ward 3J
Wed Nov 18, 2020 9:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 11/18/20 Lecture VSEPR Notation
Replies: 4
Views: 26

Re: 11/18/20 Lecture VSEPR Notation

I was also curious about this too but based off of the examples he gave us, such as XeF4 being AX4E2, I think it is only around the central atom.
by Jaden Ward 3J
Wed Nov 18, 2020 9:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2 Central Atoms?
Replies: 3
Views: 43

Re: 2 Central Atoms?

I think he just gave us that example to warm us up for the next lecture, so he will probably teach us next time.
by Jaden Ward 3J
Wed Nov 18, 2020 9:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair E-
Replies: 47
Views: 305

Re: Lone Pair E-

Just like atoms are, lone pair electrons are also considered in the electron density. Their high repulsion force causes them to act slightly different, causing 2 electron pairs needing to be as far away from eachother as possible in a structure.
by Jaden Ward 3J
Fri Nov 13, 2020 12:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: The shape
Replies: 5
Views: 60

Re: The shape

Since the molecule could be rotated and looked at from different angles, I don't think it's super important where you put the wedges but I would put them in respect to your point of view. Either way I don't think we're going to be drawing them, but rather identifying and naming the structures.
by Jaden Ward 3J
Wed Nov 11, 2020 9:49 pm
Forum: Lewis Structures
Topic: Lewis Acids and Bases
Replies: 2
Views: 42

Lewis Acids and Bases

How would I determine which species is a Lewis acid or base? For ex. Fe3+, B(OH)3, CO2, H-, and OF2 (Sapling Question 6).
by Jaden Ward 3J
Wed Nov 11, 2020 9:30 pm
Forum: Lewis Structures
Topic: Oxidation Numbers
Replies: 2
Views: 49

Oxidation Numbers

In question 9 of Sapling it asks for the oxidation number of chlorine in the perchlorate ion, are we supposed to know how to do this? I don't remember going over it during lecture.
by Jaden Ward 3J
Wed Nov 11, 2020 2:37 pm
Forum: Lewis Structures
Topic: Radicals
Replies: 12
Views: 39

Radicals

How are we supposed to identify which species are radicals? I can't find them in my notes, and does anyone know which lecture covers it?
by Jaden Ward 3J
Wed Nov 11, 2020 2:33 pm
Forum: Lewis Structures
Topic: Formal Charge
Replies: 5
Views: 37

Formal Charge

When drawing Lewis Structures are we supposed to always find the formal charge to get the most stable structure? For example in question 2 of sapling, were supposed to draw CO2−3 and assign formal charges, do we have to solve for the formal charge to figure out the structure?
by Jaden Ward 3J
Fri Nov 06, 2020 5:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 [ENDORSED]
Replies: 11
Views: 138

Re: Midterm 2 [ENDORSED]

I'm assuming that Midterm 2 is not going to be cumulative but the final probably will be.
by Jaden Ward 3J
Fri Nov 06, 2020 3:48 pm
Forum: Lewis Structures
Topic: Covalent Model Clarification
Replies: 2
Views: 48

Covalent Model Clarification

Just to be clear- the atoms with low electronegativity, such as K and Ca, are cations so their bond would be longer therefore making their shared electrons further away from it, making the atom δ+ since δ- is closer to the electron?
by Jaden Ward 3J
Fri Nov 06, 2020 2:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Curve?
Replies: 12
Views: 140

Midterm Curve?

Someone mentioned to me that the midterm is going to be curved. Does anyone know anything about it?
by Jaden Ward 3J
Mon Nov 02, 2020 8:23 pm
Forum: Lewis Structures
Topic: bond lengths
Replies: 2
Views: 29

bond lengths

Im watching the Lewis Structure lecture and I was wondering if we have to memorize the carbon bond length of 1.39 angstroms/ N - O bond lengths of 1.24 angstroms? Also, are these considered constants?
by Jaden Ward 3J
Mon Nov 02, 2020 6:16 pm
Forum: *Shrodinger Equation
Topic: Midterm Scores
Replies: 30
Views: 336

Re: Midterm Scores

it might take a bit longer than expected since they found an error in a problem recently so they have to go through all the exams again Did you have a problem in your exam too? In one of my questions there wasnt a correct answer in the multiple choice... I thought I was just making a mistake until ...
by Jaden Ward 3J
Thu Oct 29, 2020 2:58 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 9
Views: 86

Electron Affinity

Can someone please explain electron affinity to me? I can't quite wrap my head around the concept of it so maybe a different explanation could help me. Thank you in advance.
by Jaden Ward 3J
Thu Oct 29, 2020 2:55 pm
Forum: *Shrodinger Equation
Topic: Midterm Scores
Replies: 30
Views: 336

Midterm Scores

Does anyone know when we will know our scores for the midterm? I'm assuming after everyone has taken it but I'm not sure when.
by Jaden Ward 3J
Thu Oct 29, 2020 2:52 pm
Forum: Student Social/Study Group
Topic: Lavelle's Jokes
Replies: 18
Views: 240

Re: Lavelle's Jokes

OMG. Did you hear oxygen and magnesium are a couple?
by Jaden Ward 3J
Thu Oct 29, 2020 2:52 pm
Forum: Student Social/Study Group
Topic: Lavelle's Jokes
Replies: 18
Views: 240

Re: Lavelle's Jokes

What kind of dog do chemists have? Laboratory Retrievers
by Jaden Ward 3J
Thu Oct 29, 2020 2:50 pm
Forum: Student Social/Study Group
Topic: Lavelle's Jokes
Replies: 18
Views: 240

Re: Lavelle's Jokes

If Avogadro calls tell him to leave his number
by Jaden Ward 3J
Fri Oct 23, 2020 9:09 pm
Forum: DeBroglie Equation
Topic: Practice Problem
Replies: 7
Views: 62

Re: Practice Problem

Make sure grams are in kg and then also convert m to nm!
by Jaden Ward 3J
Fri Oct 23, 2020 9:06 pm
Forum: General Science Questions
Topic: Midterm
Replies: 5
Views: 55

Re: Midterm

Even if we were on campus wouldn’t the midterms still be during discussion anyways? I think this is the way he has done it in the past.
by Jaden Ward 3J
Fri Oct 23, 2020 9:01 pm
Forum: *Shrodinger Equation
Topic: Quantum Numbers ml
Replies: 1
Views: 30

Quantum Numbers ml

Can someone please explain to me why quantum number m(sub)l can equal to -2?? Thank you
by Jaden Ward 3J
Mon Oct 19, 2020 10:40 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1376

Re: How are you studying?

Hello! Similarly to others who have posted I take my time during the lectures and take note of which concepts are emphasized. Also, although the modules are repetitive of what the lectures are, I watch them and take notes on them anyways and it really solidifies the concepts! Also the post modules a...
by Jaden Ward 3J
Mon Oct 19, 2020 10:09 pm
Forum: Properties of Light
Topic: 1B.7
Replies: 1
Views: 21

1B.7

In this question I figured out how many atoms were in 5.00mg of sodium ions but then Im supposed to multiply it by 3.37x10-19 to get from atoms to joules, is there a significance to this number and are we supposed to know this constant? Thank you.
by Jaden Ward 3J
Mon Oct 19, 2020 8:55 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1A.15
Replies: 3
Views: 9

Re: 1A.15

I think Rydberg's constant should be a positive since in this specific problem we're trying to figure out which n the electron is going to from the ground state of n=1 which is gaining energy not losing it. We only do a negative when were trying to figure out the energy that is emitted from the elec...
by Jaden Ward 3J
Fri Oct 16, 2020 2:21 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Module Question 18
Replies: 1
Views: 14

Module Question 18

18. The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1 % of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertainty principle. Comment on your value obtained. A. Delta v <= ...
by Jaden Ward 3J
Fri Oct 16, 2020 1:58 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Module Question 14
Replies: 2
Views: 34

Module Question 14

14. For large everyday objects does Heisenberg's uncertainty (indeterminacy) principle play any measurable role? A. Yes, the uncertainties in position, speed, and momentum of a stationary object are noticeable or measurable. B. Yes, the uncertainties in position, speed, and momentum of a moving obje...
by Jaden Ward 3J
Wed Oct 14, 2020 5:00 pm
Forum: Properties of Light
Topic: intensity, photons, and frequency
Replies: 7
Views: 58

Re: intensity, photons, and frequency

Intensity is proportional to the number of photons (aka the number of electrons emitted) but it is not proportional to the frequency. It does not matter how many photons you have, if they do not meet the requirements of the threshold energy (the amount of energy it takes to eject an electron), then ...
by Jaden Ward 3J
Wed Oct 14, 2020 11:20 am
Forum: DeBroglie Equation
Topic: Number 32 on the Module
Replies: 2
Views: 61

Number 32 on the Module

32. If you are driving a 1.50 x 103 kg car at 27.0 m.s-1, what is the de Broglie wavelength of your car? Does your car have any measurable wavelike properties? For the first answer I got 1.64x10^-38m (can someone tell me if its right or not) but for the second part of the question I'm a bit confused...
by Jaden Ward 3J
Tue Oct 13, 2020 12:00 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelengths and Electromagnetic Spectrum
Replies: 5
Views: 29

Wavelengths and Electromagnetic Spectrum

In the Atomic Spectra Module, there are a couple questions that ask for which part of the electromagentic spectrum is that specific wavelength. Does anyone know how we're supposed to figure this out? Thanks in advance
by Jaden Ward 3J
Fri Oct 09, 2020 11:01 am
Forum: Student Social/Study Group
Topic: Discussion 3B
Replies: 1
Views: 38

Discussion 3B

Hi this is late because I just realized my question never posted but on Tuesday, Oct. 6, CCLE was down during my 3B Discussion and I was wondering if I missed anything important?
by Jaden Ward 3J
Wed Oct 07, 2020 5:39 pm
Forum: Significant Figures
Topic: Sapling Question 2
Replies: 14
Views: 113

Sapling Question 2

For the sig figs in question 2 of sapling, I turned 291.7 into 2.917x10^-2 but it said it was wrong and that it should be raised to the positive 2 not negative 2. Is the website wrong or am I just making a silly mistake?
by Jaden Ward 3J
Mon Oct 05, 2020 11:23 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E23 (c)
Replies: 2
Views: 35

Re: E23 (c)

Replying to my own question since I figured it out:
I found out the amount of ions in 25.2 kg of UF6 and then just multiplied it by 6 since there are 6 moles of F-.
by Jaden Ward 3J
Mon Oct 05, 2020 10:36 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E23 (c)
Replies: 2
Views: 35

E23 (c)

E23.) Calculate the amount (in moles) of (a) Cu2 ions in 3.00 g of CuBr2; (b) SO3 molecules in 7.00 102 mg of SO3; (c) F ions in 25.2 kg of UF6; (d) H2O in 2.00 g of Na2CO310H2O. for letter C the answer in the back of the book says that it equals 430. mol F- but I am unsure how to find out just the ...
by Jaden Ward 3J
Mon Oct 05, 2020 7:46 pm
Forum: SI Units, Unit Conversions
Topic: Conversion of grams to moles and millimoles to moles.
Replies: 9
Views: 102

Re: Conversion of grams to moles and millimoles to moles.

just another tip: you can find the necessary molar masses on the periodic table to help you convert

Go to advanced search