Search found 66 matches

by Donavin Collins 1F
Sun Jan 19, 2020 9:40 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure & Le Chatelier's Principle
Replies: 6
Views: 33

Re: Pressure & Le Chatelier's Principle

When there's a decrease in pressure, the side with the most moles is favored. And vice versa.
by Donavin Collins 1F
Sun Jan 19, 2020 9:33 pm
Forum: Ideal Gases
Topic: R Constant
Replies: 18
Views: 210

Re: R Constant

The gas constant, R, is 8.314 J/mol·K I believe.
by Donavin Collins 1F
Sun Jan 19, 2020 9:29 pm
Forum: Ideal Gases
Topic: Topics on Test 1
Replies: 37
Views: 321

Re: Topics on Test 1

The first test should include everything from Outline 1. I don't believe that we started Outline 2, but if we did then also part of Outline 2.
by Donavin Collins 1F
Sun Jan 19, 2020 7:26 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: X was ignored
Replies: 27
Views: 166

Re: X was ignored

Since X had such a small value, removing it wouldn't change anything. The x wouldn't have had a big enough change on the 0.10.
by Donavin Collins 1F
Sun Jan 19, 2020 7:23 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: pH and pOH
Replies: 5
Views: 30

Re: pH and pOH

Yes. Since pH + pOH = 14, you can find either one as long as you have the other.
by Donavin Collins 1F
Sat Jan 11, 2020 3:58 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Pure Substance
Replies: 5
Views: 36

Re: Pure Substance

It's actually equal to one, not zero. Therefore, in the equation they have no effect.
by Donavin Collins 1F
Sat Jan 11, 2020 3:46 pm
Forum: Ideal Gases
Topic: Solids and Liquids [ENDORSED]
Replies: 10
Views: 94

Re: Solids and Liquids [ENDORSED]

Since solids and liquids are considered pure substances, they wouldn't affect the equilibrium concentration.
by Donavin Collins 1F
Sat Jan 11, 2020 3:05 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Significant Figures
Replies: 8
Views: 86

Re: Significant Figures

From my knowledge, the sig figs would be based off of the initial concentration and k constant.
by Donavin Collins 1F
Sat Jan 11, 2020 3:01 pm
Forum: Ideal Gases
Topic: R in PV=nRT
Replies: 34
Views: 550

Re: R in PV=nRT

R is a gas constant and should be given to you on the formula sheet for tests.
by Donavin Collins 1F
Sat Jan 11, 2020 2:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Partial Pressure
Replies: 7
Views: 44

Partial Pressure

I need a bit of clarification for partial pressure. Is it only used for gases?
by Donavin Collins 1F
Sat Jan 11, 2020 2:54 pm
Forum: Ideal Gases
Topic: K vs Q [ENDORSED]
Replies: 7
Views: 71

K vs Q [ENDORSED]

I have a question about when to use K and Q. Also, what's the main difference between the two. Thank you. :)
by Donavin Collins 1F
Sun Dec 08, 2019 10:53 am
Forum: Conjugate Acids & Bases
Topic: Bronsted vs Conjugate
Replies: 3
Views: 99

Bronsted vs Conjugate

What's the difference between a bronsted acid and a conjugate acid?
by Donavin Collins 1F
Sun Dec 08, 2019 10:50 am
Forum: Hybridization
Topic: 2sp2 and sp2
Replies: 10
Views: 145

2sp2 and sp2

Does anyone know if we would be marked down for writing sp2 rather than 2sp2 and vice versa?
by Donavin Collins 1F
Sun Dec 08, 2019 10:09 am
Forum: Biological Examples
Topic: Cis vs Trans
Replies: 3
Views: 90

Cis vs Trans

What's the difference between cis and trans in chemistry? I've seen it around (like cisplatin and transplatin) but haven't really covered it yet.
by Donavin Collins 1F
Sun Dec 08, 2019 10:07 am
Forum: General Science Questions
Topic: Last minute tips
Replies: 2
Views: 178

Last minute tips

Does anyone have any last minute tips? It can be anything, like specific stuff that we should know for the final. Thanks!!
by Donavin Collins 1F
Sat Dec 07, 2019 6:49 pm
Forum: Naming
Topic: (ox) and (en)
Replies: 2
Views: 34

Re: (os) and (en)

Thank you!! And sorry lol, yeah I meant (ox).
by Donavin Collins 1F
Sat Dec 07, 2019 6:28 pm
Forum: Naming
Topic: (ox) and (en)
Replies: 2
Views: 34

(ox) and (en)

Can someone please explain to me what (en) and (os) mean in coordination compounds?
by Donavin Collins 1F
Sat Dec 07, 2019 5:26 pm
Forum: Naming
Topic: Wrong order
Replies: 4
Views: 44

Wrong order

Does anyone know if we would be marked down for writing out the compound or the name in the wrong order? Is there a specific order that they're supposed to be in?
by Donavin Collins 1F
Wed Dec 04, 2019 4:47 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong acids and bases
Replies: 2
Views: 31

Strong acids and bases

Is there an equation or method for knowing if an acid or base is strong? Or is there just a set list of strong acids and bases? If so, does anyone know where i can find that list? :)
by Donavin Collins 1F
Wed Dec 04, 2019 4:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Covel Workshop and Step-Up Sessions [ENDORSED]
Replies: 1
Views: 50

Covel Workshop and Step-Up Sessions [ENDORSED]

I have a quick question about two sessions, a workshop and step-up, which are set to be on Sunday night in Covel. Are they meant to be on Saturday night since we would have already took our final by that time? Or is it just extra review for those who are taking Chem 14B next quarter?
by Donavin Collins 1F
Mon Dec 02, 2019 10:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 9 and 10 Homework
Replies: 2
Views: 59

Week 9 and 10 Homework

Can someone please clarify which outlines we're allowed to solve problems from for weeks 9 and 10?
by Donavin Collins 1F
Sun Dec 01, 2019 7:12 pm
Forum: Hybridization
Topic: Writing the hydrization
Replies: 10
Views: 168

Re: Writing the hydrization

Hello, I have a question about the difference between 2sp3 and sp3. How do you know if the "2" in front of the sp3 is supposed to be there? What's the difference between the two?
by Donavin Collins 1F
Sun Dec 01, 2019 7:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2.57
Replies: 4
Views: 49

Re: 2.57

Yes, the molecule should be linear.
by Donavin Collins 1F
Sun Dec 01, 2019 7:06 pm
Forum: Dipole Moments
Topic: Hydrogen Bonding
Replies: 17
Views: 394

Re: Hydrogen Bonding

Yes, hydrogen bonding only occurs with the nitrogen, oxygen, and fluorine elements.
by Donavin Collins 1F
Sun Dec 01, 2019 7:03 pm
Forum: Lewis Structures
Topic: Bent or Angular?
Replies: 15
Views: 306

Re: Bent or Angular?

I would use bent since Lavelle uses that term more often.
by Donavin Collins 1F
Sun Dec 01, 2019 6:49 pm
Forum: Sigma & Pi Bonds
Topic: Drawing Sigma and Pi bonds
Replies: 7
Views: 94

Re: Drawing Sigma and Pi bonds

For Test 2, I received full points for simply writing the sigma and pi signs above or below the bond line. Just remember to put a sigma bond sign around every bond line since every bond contains a sigma bond.
by Donavin Collins 1F
Sun Nov 24, 2019 5:02 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 12
Views: 235

Electronegativity

How does electronegativity affect a bond?
by Donavin Collins 1F
Sun Nov 24, 2019 4:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent Shape
Replies: 29
Views: 546

Re: Bent Shape

A bent shape can have up to 2 lone pairs.
by Donavin Collins 1F
Sun Nov 24, 2019 4:46 pm
Forum: Electronegativity
Topic: Increasing/Decreasing Electronegativity
Replies: 9
Views: 156

Re: Increasing/Decreasing Electronegativity

On the periodic table, as you go from left to right the electronegativity increases. And as you go from top to bottom, the electronegativity decreases.
by Donavin Collins 1F
Sun Nov 24, 2019 4:43 pm
Forum: Sigma & Pi Bonds
Topic: How to Find Sigma Bonds and Pi Bonds
Replies: 15
Views: 296

Re: How to Find Sigma Bonds and Pi Bonds

When there is a single bond, there is one sigma bond. When there is a double bond, there is one sigma bond and one pi bond. When there is a triple bond, there is one sigma bond and two pi bonds.
by Donavin Collins 1F
Sun Nov 24, 2019 4:41 pm
Forum: Resonance Structures
Topic: Resonance structures
Replies: 15
Views: 295

Re: Resonance structures

A resonance structure is simply when a molecule can be drawn as a Lewis structure in more than one way.
by Donavin Collins 1F
Sat Nov 16, 2019 11:30 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Test 2
Replies: 5
Views: 44

Test 2

I'm a bit confused on what exactly is going to be on test 2. Can someone explain to me what's going to be on it? Thank you.
by Donavin Collins 1F
Sat Nov 16, 2019 11:25 am
Forum: Ionic & Covalent Bonds
Topic: Hydrogen Bond Strength
Replies: 8
Views: 88

Re: Hydrogen Bond Strength

Hydrogen bonds are weaker than ionic and covalent bonds.
by Donavin Collins 1F
Sat Nov 16, 2019 11:18 am
Forum: Bond Lengths & Energies
Topic: Shorter bond lengths
Replies: 12
Views: 105

Re: Shorter bond lengths

When there is a double bond, the attraction between the two atoms is stronger which pulls them closer together. Triple bonds pull the atoms together even closer because the attraction is stronger than a double bond.
by Donavin Collins 1F
Sat Nov 16, 2019 11:13 am
Forum: Lewis Structures
Topic: Ground-State Electron Configuration
Replies: 5
Views: 56

Re: Ground-State Electron Configuration

They're both interchangeable.
by Donavin Collins 1F
Sat Nov 16, 2019 11:11 am
Forum: Ionic & Covalent Bonds
Topic: Bond Strength
Replies: 12
Views: 121

Re: Bond Strength

If the ionic bond is in water, then the covalent bond is stronger. If it's out of water, then the ionic bond is stronger.
by Donavin Collins 1F
Sun Nov 10, 2019 10:05 pm
Forum: Lewis Structures
Topic: Does the shape that I draw the Lewis structure matter?
Replies: 14
Views: 110

Re: Does the shape that I draw the Lewis structure matter?

As long as the electrons are correctly represented, the shape shouldn't matter for now.
by Donavin Collins 1F
Sun Nov 10, 2019 10:01 pm
Forum: Ionic & Covalent Bonds
Topic: Electronegativity in between 1.5 and 2
Replies: 2
Views: 36

Re: Electronegativity in between 1.5 and 2

If it's between 1.5 and 2, there isn't a way to make a solid conclusion.
by Donavin Collins 1F
Sun Nov 10, 2019 9:55 pm
Forum: Electronegativity
Topic: Periodic Trend
Replies: 13
Views: 128

Re: Periodic Trend

The electronegativity increases as it goes up the groups and across the periods.
by Donavin Collins 1F
Sun Nov 10, 2019 9:51 pm
Forum: Ionic & Covalent Bonds
Topic: Solid v. Liquid v. Gas
Replies: 8
Views: 83

Re: Solid v. Liquid v. Gas

From my knowledge, I believe that the state of the element is info that is given.
by Donavin Collins 1F
Sun Nov 10, 2019 9:50 pm
Forum: SI Units, Unit Conversions
Topic: Homework from Outline 3 due?
Replies: 5
Views: 157

Re: Homework from Outline 3 due?

The homework due this week should be from outline 3. We haven't completely finished the section yet.
by Donavin Collins 1F
Sun Nov 03, 2019 6:31 pm
Forum: Resonance Structures
Topic: Resonance structures
Replies: 6
Views: 126

Resonance structures

What is a resonance structure?
by Donavin Collins 1F
Sun Nov 03, 2019 6:31 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 5
Views: 57

Drawing Lewis Structures

How do you draw a Lewis structure?
by Donavin Collins 1F
Sun Nov 03, 2019 6:29 pm
Forum: Sigma & Pi Bonds
Topic: Sigma vs Pi Bonds
Replies: 2
Views: 42

Sigma vs Pi Bonds

What's the difference between a sigma and pi bond?
by Donavin Collins 1F
Sun Nov 03, 2019 6:29 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent
Replies: 14
Views: 169

Ionic vs Covalent

How can you tell if a bond is ionic or covalent?
by Donavin Collins 1F
Sun Nov 03, 2019 6:27 pm
Forum: Bond Lengths & Energies
Topic: Does bond length have any effects?
Replies: 5
Views: 45

Does bond length have any effects?

Does the bond length have any effect on the bond itself?
by Donavin Collins 1F
Sun Oct 27, 2019 9:00 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic VS. Covalent Bond
Replies: 8
Views: 71

Ionic VS. Covalent Bond

Hello, I'm wondering how exactly you know when it's an ionic bond or a covalent bond. Thank you.
by Donavin Collins 1F
Sun Oct 27, 2019 8:49 pm
Forum: Sigma & Pi Bonds
Topic: Sigma vs. Pi
Replies: 11
Views: 719

Re: Sigma vs. Pi

The first bond is a sigma bond, and then the next two would be pi bonds.
by Donavin Collins 1F
Sun Oct 27, 2019 8:13 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 14
Views: 152

Re: Covalent Bonds

Yes, I believe that covalent bonds are only between two nonmetals.
by Donavin Collins 1F
Sun Oct 27, 2019 8:02 pm
Forum: Ionic & Covalent Bonds
Topic: Homework
Replies: 13
Views: 176

Re: Homework

I think that we should be able to do problems from both sections.
by Donavin Collins 1F
Sun Oct 27, 2019 7:50 pm
Forum: Sigma & Pi Bonds
Topic: Single vs. Double bonds
Replies: 15
Views: 148

Re: Single vs. Double bonds

Since the double bond creates a stronger bond, the attraction pulls the atoms closer together which shortens the length of the bond.
by Donavin Collins 1F
Sun Oct 20, 2019 5:04 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation
Replies: 11
Views: 123

DeBroglie Equation

I have a quick question about the DeBroglie Equation. When exactly do we use it and what units does it deal with? Thank you!! :)
by Donavin Collins 1F
Sun Oct 20, 2019 4:59 pm
Forum: Einstein Equation
Topic: When do we use the Einstein Equation?
Replies: 14
Views: 360

When do we use the Einstein Equation?

Hello :) I'm kinda confused about when exactly we use the Einstein Equation. Also, is it something that's used a lot? Thank you!
by Donavin Collins 1F
Sun Oct 20, 2019 4:53 pm
Forum: DeBroglie Equation
Topic: Units for mass
Replies: 4
Views: 69

Re: Units for mass

I believe it wouldn't matter too much if you used grams or kgs, as long as it isn't specified to use a specific unit.
by Donavin Collins 1F
Sun Oct 20, 2019 4:50 pm
Forum: Properties of Light
Topic: HW problem A3
Replies: 2
Views: 46

Re: HW problem A3

I did this problem last week, and assuming that I'm correct I explained that the "extent of the change" (which is basically slope) decreases since the waves are more spread out. If the frequency were to increase, then the waves would be more squeezed together which creates a greater slope/...
by Donavin Collins 1F
Sun Oct 20, 2019 4:42 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 58
Views: 1314

Re: Advice for studying

It's best to make sure you understand every/most concepts before moving onto the next. That way, you don't have to go back and start over. I would also recommend doing homework problems after you're finished as a way to quiz yourself.
by Donavin Collins 1F
Sun Oct 13, 2019 10:07 pm
Forum: *Black Body Radiation
Topic: Black Body
Replies: 6
Views: 221

Black Body

What exactly are black body and black body radiation? Also, when do they come up/are necessary?
by Donavin Collins 1F
Sun Oct 13, 2019 10:03 pm
Forum: Properties of Electrons
Topic: Photon
Replies: 5
Views: 31

Photon

What exactly is a photon?
by Donavin Collins 1F
Sun Oct 13, 2019 9:40 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 4750

Re: Test 1 [ENDORSED]

Does anyone know if sig figs were marked down if wrong?
by Donavin Collins 1F
Sun Oct 13, 2019 9:38 pm
Forum: Properties of Light
Topic: Reading entire chapters before class?
Replies: 4
Views: 63

Re: Reading entire chapters before class?

It would be more useful to do the homework problems while you're reading the chapters.
by Donavin Collins 1F
Sun Oct 13, 2019 9:35 pm
Forum: SI Units, Unit Conversions
Topic: Angstrom
Replies: 16
Views: 410

Re: Angstrom

Why isn't an Angstrom considered an SI unit?
by Donavin Collins 1F
Sun Oct 06, 2019 3:27 pm
Forum: Empirical & Molecular Formulas
Topic: Combustion Analysis
Replies: 6
Views: 110

Re: Combustion Analysis

When combustion occurs, can anything else be a product besides H2O and CO2?
by Donavin Collins 1F
Wed Oct 02, 2019 11:29 am
Forum: Balancing Chemical Reactions
Topic: Stoichiometric Coefficients [ENDORSED]
Replies: 8
Views: 172

Re: Stoichiometric Coefficients [ENDORSED]

Since we're looking for the lowest multiple for coefficients, would it be possible to divide? Or are you only allowed to multiply? (For example, would you be able to switch from 2H2O to just H2O?)
by Donavin Collins 1F
Tue Oct 01, 2019 5:59 pm
Forum: Balancing Chemical Reactions
Topic: Aqueous compounds
Replies: 5
Views: 353

Re: Aqueous compounds

Does a compound being aqueous, or any other physical state, affect the process of balancing a chemical reaction? Or is it just a detail that doesn't affect the problem?
by Donavin Collins 1F
Tue Oct 01, 2019 5:45 pm
Forum: Significant Figures
Topic: Sig figs confusion
Replies: 8
Views: 157

Re: Sig figs confusion

Can someone briefly explain sig figs? My current understanding is that it's when you round to a certain place (tenth, hundredth...), but this is a topic that I never really understood. Also, is there is certain area of chemistry where you use it frequently? Thanks.
by Donavin Collins 1F
Tue Oct 01, 2019 5:32 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent
Replies: 29
Views: 2958

Re: Ionic vs Covalent

When compared to ionic bonds IN water, covalent bonds are stronger.

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