## Search found 23 matches

Wed Dec 06, 2017 5:38 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: "ignoring" x
Replies: 2
Views: 249

### Re: "ignoring" x

This would be in terms of ICE box problems.
Wed Dec 06, 2017 5:38 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: "ignoring" x
Replies: 2
Views: 249

### "ignoring" x

Does the concept of ignoring x also apply to Kc equations, or is it only Ka and Kb problems?
Sun Dec 03, 2017 10:20 pm
Forum: Bronsted Acids & Bases
Topic: Acid and base reactions in water
Replies: 1
Views: 204

### Acid and base reactions in water

Does an acid in water always form H3O+ ions, and does a base in water always form OH- ions?
Wed Nov 29, 2017 9:21 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: When can a tetrahedral be non polar? [ENDORSED]
Replies: 4
Views: 952

### When can a tetrahedral be non polar?[ENDORSED]

Can a molecule with a tetrahedral shape only be non-polar when all 4 surrounding atoms are the same?
Mon Nov 27, 2017 8:48 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: When to use ICE box
Replies: 2
Views: 441

### When to use ICE box

So when do we know that we should use ICE box instead of just plugging known values into the K equation? I'm referring specifically to 11.45.
Mon Nov 27, 2017 8:05 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: hw problem 11.39
Replies: 3
Views: 529

### Re: hw problem 11.39

How did you even begin this problem? How did you know that this was the way to solve it?
Mon Nov 27, 2017 7:20 pm
Forum: Ideal Gases
Topic: Bar
Replies: 3
Views: 445

### Bar

So, in layman's terms lol, what does bar even mean, and is it significant in any way?
Sun Nov 19, 2017 8:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.19 b
Replies: 3
Views: 240

### Re: 4.19 b

So does this mean in all cases such as (CH3)2Be or anything like that, we should also be considering the shape of the molecule with central atom 'C' in addition to the shape of the overall molecule? Basically anytime there is a compound inside a molecule, should we also name the shape of the specifi...
Wed Nov 15, 2017 2:16 pm
Forum: Lewis Structures
Topic: Unrelated midterm question
Replies: 2
Views: 261

### Unrelated midterm question

Should we be getting partial credit for questions on this midterm?
Tue Nov 14, 2017 1:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Cis- vs. Trans-
Replies: 4
Views: 433

### Cis- vs. Trans-

Does this refer to the orientation of the dipoles around the molecule?
Wed Nov 08, 2017 8:23 pm
Forum: Octet Exceptions
Replies: 3
Views: 389

How do we know that Cl has lower electronegativity than O?
Mon Nov 06, 2017 2:33 pm
Forum: Octet Exceptions
Topic: When to expand an octet
Replies: 2
Views: 404

### When to expand an octet

So for question 3.93 part (b) is asks us to draw the Lewis structure and all resonance structures for BrO+. Since Bromine can have an expanded octet, why wouldn't there be a resonance structure that has a triple bond between O and Br, then 2 lone pairs on Br, and one lone pair on O. Do expanded octe...
Mon Oct 30, 2017 4:35 pm
Forum: Ionic & Covalent Bonds
Topic: determining bonds
Replies: 4
Views: 314

### determining bonds

Is the only way to know whether a compound is ionic or covalent to know whether the elements are metal vs non-metal? Or is there another way to figure it out?
Mon Oct 30, 2017 4:02 pm
Forum: Lewis Structures
Topic: Knowing compound formulas
Replies: 3
Views: 343

### Knowing compound formulas

For question 3.39, the book gives us the names of compound i.e. (a) ammonium chloride and asks us to draw the lewis structure for it. Will we be expected to know the formula for compounds such as these, or will we be given the formula on a test?
Mon Oct 23, 2017 4:37 pm
Forum: Trends in The Periodic Table
Topic: Matching up with the book
Replies: 1
Views: 199

### Matching up with the book

I'm a little confused as to where we are in the book right now, i.e. what homework problems we should be working on. I feel like we have so far only covered up to 2.10, yet today in lecture we learned some things that are on the chapter 3 homework, but there are still parts of chapter 2 that we have...
Mon Oct 23, 2017 4:16 pm
Forum: Trends in The Periodic Table
Topic: 2.55 part c
Replies: 1
Views: 157

### 2.55 part c

Give the notation for the valence-shell configuration (including the outermost d-electrons):
(c) Group 5 transition metals

Can anyone explain to me why the answer is d5s2 instead of d3s2?
Mon Oct 23, 2017 3:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2.43 (a) Silver
Replies: 4
Views: 352

### Re: 2.43 (a) Silver

So can anyone confirm the exceptions, since it appears that silver is also following the exception that I thought applied only to chromium and copper?
Thu Oct 19, 2017 7:07 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Homework 2.29
Replies: 2
Views: 287

### Re: Homework 2.29

Something that works for these problems (not sure what the conditions need to be in order for this to be true across the board) is to determine the number of possible orbitals then multiply that by 2 to account for ms=1/2 and ms= -1/2. So, for this problem, like you stated, there can be s and p orbi...
Thu Oct 19, 2017 6:57 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Uncertainty Equation
Replies: 7
Views: 479

### Re: Heisenberg Uncertainty Equation

For an example of a real problem using this equation, 1.43 in the book is just that. Exactly the same in concept as the one that was the example in lecture.
Wed Oct 11, 2017 9:06 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect: Post Module Assessment Q. 28, 29, and 30
Replies: 12
Views: 861

### Re: Photoelectric Effect: Post Module Assessment Q. 28, 29, and 30

I did the same thing for 28 because I switched the mass of an electron to grams instead of keeping it in kilograms. I posted a question about this, but now I see that supposedly we are supposed to keep the mass of an electron in kg. It should work out once you do this.
Wed Oct 11, 2017 8:54 pm
Forum: Photoelectric Effect
Topic: Mass of an electron
Replies: 4
Views: 358

### Mass of an electron

Do we keep the mass of an electron in kg when solving photoelectric effect equation problems?
Wed Oct 04, 2017 3:47 pm
Forum: Limiting Reactant Calculations
Topic: Problem M11 part a
Replies: 5
Views: 501

### Problem M11 part a

Here is the question from the textbook (Fundamentals Section M)- A reaction vessel contains 5.77 g of white phosphorus and 5.77 g of oxygen. The first reaction to take place is the formation of phosphorus (lll) oxide, P4O6: P4+ 3O2--> P4O6. If enough oxygen is present, the oxygen can react further w...
Mon Oct 02, 2017 4:41 pm
Forum: Empirical & Molecular Formulas
Topic: Problem F21
Replies: 2
Views: 287

### Problem F21

I was doing problem F21, and the solutions manual kept a decimal (8.18 moles of carbon) in the empirical formula (which was needed to solve the actual problem, the molecular formula). Can anyone clarify when or if we should leave a decimal in any molecular or empirical formula?