Search found 22 matches

by Shannee Mak 3F
Sat Dec 09, 2017 2:42 am
Forum: Bronsted Acids & Bases
Topic: Amphoteric - BeO
Replies: 2
Views: 161

Amphoteric - BeO

Can someone explain to me why BeO is amphoteric? I would assume that it would only be a basic oxide, but the book says it is amphoteric. Why is this?
by Shannee Mak 3F
Mon Dec 04, 2017 7:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Will there be a practice final? [ENDORSED]
Replies: 2
Views: 301

Re: Will there be a practice final? [ENDORSED]

The practice midterm was given out/made by the UA Lyndon Bui (if this is the practice midterm I think that you're referring to). I would suggest going to his review session on Friday, as if he made one then it would be given out then.
by Shannee Mak 3F
Sun Dec 03, 2017 3:51 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Dentates
Replies: 6
Views: 227

Re: Dentates

You would focus on the atoms, not the number of electron pairs on each atom, as you determine if it's monodentate, bidentate etc by how many "sites" there are.

H2O is monodentate.
by Shannee Mak 3F
Sun Dec 03, 2017 3:11 pm
Forum: Naming
Topic: Naming
Replies: 4
Views: 187

Re: Naming

If the ligand already has a greek prefix, or is a polydentate (is able to attach at more than one binding site), you use the "special" type of prefixes (bis for 2, tris for 3, tetrakis for 4) Ligands such as ethylenediamine and diethylenediamine would use these prefixes rather than the nor...
by Shannee Mak 3F
Sun Dec 03, 2017 3:02 pm
Forum: Hybridization
Topic: Clarification on hybridization
Replies: 3
Views: 181

Re: Clarification on hybridization

Yep! Another example would also be NH3. N would have a lone pair as well as three H atoms bonded to it. There are 4 regions of electron density and so then the hybridization of N would be sp^3
by Shannee Mak 3F
Sun Nov 26, 2017 11:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 786978

Re: Post All Chemistry Jokes Here

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by Shannee Mak 3F
Tue Nov 21, 2017 11:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.75 Molecular Shape
Replies: 1
Views: 87

4.75 Molecular Shape

The question is: An organic compound distilled from wood was found to have a molar mass of 32.04 g·mol1 and the following composition by mass: 37.5% C, 12.6% H, and 49.9% O. (a) Write the Lewis structure of the compound and determine the bond angles about the carbon and oxygen atoms. (b) Give the h...
by Shannee Mak 3F
Sun Nov 19, 2017 11:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 786978

Re: Post All Chemistry Jokes Here

What is the chemical formula for banana?

BaNa2
by Shannee Mak 3F
Thu Nov 16, 2017 12:24 am
Forum: Determining Molecular Shape (VSEPR)
Topic: T-shape
Replies: 2
Views: 120

T-shape

Can someone briefly explain the t-shape to me?

And why the two lone pairs would be next to each other in this shape?

Thanks
by Shannee Mak 3F
Sun Nov 12, 2017 6:19 pm
Forum: Lewis Structures
Topic: Midterm Question CH3SH
Replies: 5
Views: 240

Re: Midterm Question CH3SH

This confuses me. I would think that sulfur would be the central atom, as sulfur has a lower ionization energy than carbon. When I look at a chart for ionization energy, carbon is 1086.5 kJ/mol while sulfur is 999.6 kJ/mol. Would you know that the three H-atoms are bonded to C because of how it's wr...
by Shannee Mak 3F
Tue Nov 07, 2017 9:14 pm
Forum: Lewis Structures
Topic: Homework 3.33 C
Replies: 2
Views: 145

Homework 3.33 C

This homework question asks for the lewis structure of ONF. In the solutions manual, the lewis structure has N as the central atom. When I was drawing the structure, I thought that O would be the central atom, as it would have less ionization energy than O because of the electrons in the p orbital (...
by Shannee Mak 3F
Sun Nov 05, 2017 11:41 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 786978

Re: Post All Chemistry Jokes Here

Why do white bears dissolve in water?

Because they're polar!
by Shannee Mak 3F
Thu Nov 02, 2017 2:25 pm
Forum: Ionic & Covalent Bonds
Topic: Study Habits [ENDORSED]
Replies: 8
Views: 407

Re: Study Habits [ENDORSED]

I find that watching many different videos on youtube is very helpful with reinforcing what we've learned. First I watch more general/broad videos that are provided such as crashcourse and then move towards videos that are more applicable and provide examples (khanacademy). A helpful channel I use i...
by Shannee Mak 3F
Sun Oct 29, 2017 7:46 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Post-Module Q.18 [ENDORSED]
Replies: 3
Views: 212

Re: Post-Module Q.18 [ENDORSED]

Nevermind, I solved it!
by Shannee Mak 3F
Sun Oct 29, 2017 6:21 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Post-Module Q.18 [ENDORSED]
Replies: 3
Views: 212

Re: Post-Module Q.18 [ENDORSED]

I've been calculating again and again, but I keep getting an extremely small number (like x10^-22) ... am I supposed to be using the diameter or the radius in the calculations?
by Shannee Mak 3F
Sun Oct 29, 2017 4:21 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Post-Module Q.18 [ENDORSED]
Replies: 3
Views: 212

Post-Module Q.18 [ENDORSED]

I'm having a little trouble mapping out the steps for how to correctly solve this problem. Could someone help me with the steps? Thanks! The question: 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...
by Shannee Mak 3F
Sun Oct 22, 2017 8:03 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: What section of the book to be on [ENDORSED]
Replies: 2
Views: 161

Re: What section of the book to be on [ENDORSED]

I was thinking that we had stopped there. Thanks! I definitely agree
by Shannee Mak 3F
Sun Oct 22, 2017 7:54 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: What section of the book to be on [ENDORSED]
Replies: 2
Views: 161

What section of the book to be on [ENDORSED]

Until what point of the book should we have read up to in order to match with what we have gone over in lecture? 2.8?
by Shannee Mak 3F
Sun Oct 15, 2017 10:20 pm
Forum: Einstein Equation
Topic: Einstein
Replies: 4
Views: 244

Re: Einstein

This quote sheds light onto how Einstein alluded to the idea of photons: "when a light ray is spreading from a point, the energy is not distributed continuously over ever-increasing spaces, but consists of a finite number of energy quanta that are localized in points in space, move without divi...
by Shannee Mak 3F
Sun Oct 15, 2017 9:46 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 786978

Re: Post All Chemistry Jokes Here

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by Shannee Mak 3F
Sun Oct 08, 2017 2:37 pm
Forum: Significant Figures
Topic: Whole Numbers, One Sig Fig [ENDORSED]
Replies: 3
Views: 220

Whole Numbers, One Sig Fig [ENDORSED]

Say you get a number like 52 as an answer, but the smallest amount of sig figs in the problem is 1 sig fig. How would you round? Would you put the answer as 50?
by Shannee Mak 3F
Thu Oct 05, 2017 2:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 786978

Re: Post All Chemistry Jokes Here

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