Search found 29 matches

by Kristina Nguyen 1C
Wed Jan 17, 2018 11:03 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Radiation vs. Convection
Replies: 3
Views: 180

Radiation vs. Convection

What is the difference between the two?
by Kristina Nguyen 1C
Sat Dec 09, 2017 2:00 am
Forum: Hybridization
Topic: Radicals [ENDORSED]
Replies: 1
Views: 144

Radicals [ENDORSED]

Does a radical count as a region of electron density when determining hybridization and shape?
by Kristina Nguyen 1C
Fri Dec 08, 2017 10:28 pm
Forum: Hybridization
Topic: Composition of a Bond
Replies: 6
Views: 397

Re: Composition of a Bond

Oh yeah I totally overlooked the lone pairs, thanks!
by Kristina Nguyen 1C
Fri Dec 08, 2017 10:10 pm
Forum: Hybridization
Topic: Composition of a Bond
Replies: 6
Views: 397

Composition of a Bond

Would the composition of the OH bond in HCOOH be made up of a sigma(H1s, O2s)? Thanks!
by Kristina Nguyen 1C
Thu Dec 07, 2017 12:32 am
Forum: Octet Exceptions
Topic: Biradicals [ENDORSED]
Replies: 1
Views: 181

Biradicals [ENDORSED]

When would a biradical exist and how would you know to draw a molecule with a biradical?
by Kristina Nguyen 1C
Wed Dec 06, 2017 2:04 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 12.47 [ENDORSED]
Replies: 2
Views: 163

12.47 [ENDORSED]

Why does a higher oxidation number increase acidity?
by Kristina Nguyen 1C
Wed Dec 06, 2017 12:08 am
Forum: Amphoteric Compounds
Topic: Acidic, basic, or amphoteric? [ENDORSED]
Replies: 4
Views: 734

Acidic, basic, or amphoteric? [ENDORSED]

How to tell the difference between them?
by Kristina Nguyen 1C
Mon Dec 04, 2017 9:03 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: J.5
Replies: 2
Views: 222

J.5

For J.5.C why does the net equation have 2H2O as a product?
by Kristina Nguyen 1C
Sun Dec 03, 2017 9:01 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: J.5 Problem
Replies: 3
Views: 210

J.5 Problem

I was wondering why the ionic equation wouldn't be (H+)+(F-)+(Na+)+(OH-) > (Na+)+(F-)+H2O instead of HF+(Na+)+(OH-) > (Na+)+(F-)+H2O
by Kristina Nguyen 1C
Sun Dec 03, 2017 6:24 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH and pOH
Replies: 10
Views: 455

Re: pH and pOH

The p in pH will stand for potential, potential hydrogen
by Kristina Nguyen 1C
Sun Dec 03, 2017 6:15 pm
Forum: Lewis Acids & Bases
Topic: Bronsted vs Lewis
Replies: 6
Views: 304

Bronsted vs Lewis

Can someone remind me the difference between the two?
by Kristina Nguyen 1C
Wed Nov 22, 2017 10:05 pm
Forum: Naming
Topic: di, bis, tri, tris, etc
Replies: 4
Views: 236

Re: di, bis, tri, tris, etc

Further examples of polydente ligands are carbonato, oxalato, and nitro
by Kristina Nguyen 1C
Wed Nov 22, 2017 10:03 pm
Forum: Naming
Topic: Naming the metal
Replies: 4
Views: 188

Naming the metal

When do you know when to name the metal alone, with an -ate, or as an ion?
by Kristina Nguyen 1C
Sat Nov 18, 2017 1:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent or linear?
Replies: 11
Views: 670

Bent or linear?

Would a molecule with a double/triple bond on one side of a central atom and a single bond on the other side of that atom be linear or bent?
by Kristina Nguyen 1C
Sat Nov 18, 2017 1:32 pm
Forum: Bond Lengths & Energies
Topic: Regions of Electron Density
Replies: 4
Views: 255

Regions of Electron Density

Is a double bond considered one region or two regions of electron density, and so on with other multiple bonds?
by Kristina Nguyen 1C
Sun Nov 12, 2017 12:09 pm
Forum: Electronegativity
Topic: Electronegativity and electron affinity
Replies: 3
Views: 208

Electronegativity and electron affinity

What is the difference the two?
by Kristina Nguyen 1C
Sun Nov 12, 2017 12:05 pm
Forum: Ionic & Covalent Bonds
Topic: Bond types
Replies: 2
Views: 136

Bond types

What are the differences between ionic, nonpolar, polar, and covalent bonds? And examples?
by Kristina Nguyen 1C
Mon Nov 06, 2017 4:26 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1017379

Re: Post All Chemistry Jokes Here

Derek Waters 1A wrote:Do you know any good sodium jokes?
Na.
You should, they’re sodium funny!

Thats so funny!!
by Kristina Nguyen 1C
Sun Nov 05, 2017 6:23 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent Bonds
Replies: 4
Views: 220

Ionic vs Covalent Bonds

Which one is stronger?
by Kristina Nguyen 1C
Sun Nov 05, 2017 6:20 pm
Forum: Lewis Structures
Topic: Expanded Octet Rule
Replies: 3
Views: 188

Expanded Octet Rule

Can someone please explain why phosphorous can form an expanded octet but not other elements close to it like silicon?
by Kristina Nguyen 1C
Fri Oct 27, 2017 5:15 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Tl3+ electron configuration
Replies: 2
Views: 795

Tl3+ electron configuration

Why is the electron configuration for Tl3+ [Xe]4f14,5d10 and not [Xe]4f14,5d8,6s2?
by Kristina Nguyen 1C
Fri Oct 27, 2017 4:59 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3.5 HW Problem
Replies: 1
Views: 147

3.5 HW Problem

Part b for this problem is asking for the electron configuration for Cu+, I put down [Ar]3d^8,4s^2 but the answer is [Ar]3d^10. So, even though the 4s orbital comes first on the period table, is it not filled first? Does that go from all other orbitals as well?
by Kristina Nguyen 1C
Fri Oct 20, 2017 5:54 pm
Forum: Quantum Numbers and The H-Atom
Topic: Magnetic Spin Numbers
Replies: 3
Views: 204

Re: Magnetic Spin Numbers

When a orbital is filled, the sub shell's 'spaces' are first filled spin up (+1/2). After each 'space' is occupied by one electron, the electrons will start pairing, which is when they would be spin down (-1/2). Therefore, you would know which magnetic spin number to use based on where the electron ...
by Kristina Nguyen 1C
Fri Oct 20, 2017 5:45 pm
Forum: Quantum Numbers and The H-Atom
Topic: D-Orbital
Replies: 4
Views: 314

D-Orbital

For the p-orbital we can use subscripts x, y, and z to indicate which sub shell the electron has ended up in, but what subscripts would be used for the d-orbital, since it has five sub shells?
by Kristina Nguyen 1C
Thu Oct 12, 2017 8:50 pm
Forum: Properties of Light
Topic: Conversions
Replies: 3
Views: 196

Re: Conversions

I was confused for a bit too because sometimes the book automatically jumps from m to nm too but the number will say #x10^-7 and not 10^-9. However, this is probably because the spectrum we typically see nm in are in the hundreds. For example 7.0x10^-7 = 700 nm and on the other hand, 7.0x10^-9 m is ...
by Kristina Nguyen 1C
Thu Oct 12, 2017 8:36 pm
Forum: Properties of Electrons
Topic: Stefan-Boltzmann law units
Replies: 1
Views: 179

Stefan-Boltzmann law units

In the Stefan-Botlzmann law, where Total intensity=a constant x T^4, why is the Kelvin in the constant (5.67x10^-8 Wm^-2K^-4) denoted as K^-4?
by Kristina Nguyen 1C
Thu Oct 05, 2017 10:18 pm
Forum: SI Units, Unit Conversions
Topic: Exercise F11
Replies: 4
Views: 269

Re: Exercise F11

Adrian Lim 1J wrote:Hi,
Are you talking about part a with Na, Al, and F? After dividing all three by the smallest, I got 5.9, so I would assume you could round to 6.

Yes, and ah ok thanks!
by Kristina Nguyen 1C
Thu Oct 05, 2017 7:28 pm
Forum: SI Units, Unit Conversions
Topic: Exercise F11
Replies: 4
Views: 269

Exercise F11

After I have converted all my mass percentages to moles, I am left with 2.9 mol, 1 mol, and 5.83 mol to use for my empirical formula ratio. Is it ok to round my 5.83 mol to 6?
by Kristina Nguyen 1C
Mon Oct 02, 2017 5:07 pm
Forum: Balancing Chemical Reactions
Topic: Fundamental Exercise H.11
Replies: 2
Views: 256

Fundamental Exercise H.11

In the exercise, it is asked that you balance two stages of a reaction. I have balanced the first stage, but I am confused on what to use as my reactants for the second stage... Do I include the stoichiometric coefficient from the first balanced equation?

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