## Search found 24 matches

Sun Jul 30, 2017 8:58 pm
Forum: Conjugate Acids & Bases
Topic: What exactly are conjugate acids and base? [ENDORSED]
Replies: 8
Views: 904

### Re: What exactly are conjugate acids and base?[ENDORSED]

Thank you for the clarification Sarah :)
Sun Jul 30, 2017 8:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Change
Replies: 2
Views: 208

### Re: Change

Thank you for the clarification!
Sun Jul 30, 2017 5:30 pm
Forum: Conjugate Acids & Bases
Topic: What exactly are conjugate acids and base? [ENDORSED]
Replies: 8
Views: 904

### Re: What exactly are conjugate acids and base?[ENDORSED]

Does having a strong acid mean having a weak base? and vice versa? Thank you in advance!
Sun Jul 30, 2017 5:24 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Change
Replies: 2
Views: 208

### Change

I am unsure whether we have to use "-x" to the reactants and "+2x" to the product side according to what the question is asking or if we can use "+x" for reactants and "-2x" for the products as long as we use the same signs ( -/+ ) for the corresponding reacta...
Sun Jul 30, 2017 5:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium value
Replies: 2
Views: 284

### Re: Equilibrium value

When do we have to leave out the solvent? Thank you in advance!
Sun Jul 30, 2017 4:47 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Self Test 2 problem 9
Replies: 2
Views: 302

### Re: Self Test 2 problem 9

Thank you for the clarification, Ricky!
Wed Jul 26, 2017 7:25 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Self Test 2 problem 9
Replies: 2
Views: 302

### Self Test 2 problem 9

We were trying to figure how to figure out how to begin solving this problem with the Peer Learning Facilitator, but we weren't able to figure out how. By any chance may somebody help us on how to approach the problem? It is from the Self Test 2, problem 9 on page 186. "A researcher fills a 1.0...
Sat Jul 22, 2017 10:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing Models
Replies: 1
Views: 302

### Drawing Models

When drawing the models, are we able to leave the answer like the bottom image? or do we have to compress the bonds when a lone pair is present? I asked my peer learning facilitator about this and she said it was okay to leave it without compressing the bonds, but I just want to make sure if we can ...
Sat Jul 22, 2017 9:37 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Positive Concentrations
Replies: 1
Views: 130

### Positive Concentrations

Just to clarify, if we get two positive answers for concentrations, we will know one of the answers won't make sense due to the answer being higher than the initial concentration right? Thank you in advance!
Sat Jul 22, 2017 9:09 pm
Forum: Naming
Topic: Naming Ligands
Replies: 4
Views: 393

### Naming Ligands

I keep practicing how to name ligands, but I cannot figure out a pattern or something helpful to name them. By any chance does somebody have a way or any tips on how to start naming them? Thank you in advance!
Sat Jul 22, 2017 8:31 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming compounds
Replies: 2
Views: 365

### Re: Naming compounds

I don't believe we have to give the chemical formula when naming complex compounds, but please correct me if I am wrong. I believe we just have to know how to name them.
Sun Jul 16, 2017 12:02 am
Forum: Formal Charge and Oxidation Numbers
Topic: Ionization energy vs. electron affinity [ENDORSED]
Replies: 5
Views: 439

### Re: Ionization energy vs. electron affinity[ENDORSED]

I believe that ionization energy is the energy required to remove an electron. Electron affinity is how likely it is to attract an electron. I believe these are the main differences, but if anybody would like to correct me, please do! thank you in advance!
Sat Jul 15, 2017 11:54 pm
Forum: Lewis Structures
Topic: Formal Charge
Replies: 5
Views: 562

### Re: Formal Charge

to clarify, the lowest numbers mean the structure is most stable right? I am unsure of this but I would appreciate if somebody can clarify this for me. Thank you in advance!
Sat Jul 15, 2017 11:49 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 4
Views: 387

### Re: Electron Configurations

How do we know when the excited state occurs? thank you in advance!
Sat Jul 15, 2017 11:46 pm
Forum: Ionic & Covalent Bonds
Topic: Polyatomic Lewis Structures
Replies: 5
Views: 705

### Re: Polyatomic Lewis Structures

I agree with Paul. It gets a little confusing when we are shown 2+ or 2- for example because you are technically doing the opposite.
If it shows 2+, then you are removing. If it shows 2-, then you are adding.
Sun Jul 09, 2017 9:45 pm
Forum: Properties of Light
Topic: Electron Configuration
Replies: 4
Views: 299

### Re: Electron Configuration

Thank you for the clarification! :)
Sun Jul 09, 2017 8:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atomic Orbitals
Replies: 4
Views: 517

### Re: Atomic Orbitals

I believe the quantum numbers n, l, ml are used to specify an orbital
Sun Jul 09, 2017 8:54 pm
Forum: Properties of Electrons
Topic: Formal Charge
Replies: 1
Views: 198

### Formal Charge

We were given the equation for formal charge: FC= V-(L + S/2). I am unsure what the S in the equation represents. May anybody please let me know what it represents? Thank you in advance!
Sun Jul 09, 2017 8:49 pm
Forum: Properties of Light
Topic: Electron Configuration
Replies: 4
Views: 299

### Electron Configuration

When we are asked to write down the electron configuration for Nitrogen for example, do we have to write 1s^2 2s^2 2px^1 2py^1 2pz^1 or can we simply just write 1s^1 2s^2 2p^3 ? Thank you in advance!
Sun Jul 09, 2017 8:37 pm
Forum: SI Units, Unit Conversions
Topic: Molar Mass
Replies: 7
Views: 849

### Re: Molar Mass

I confuse these two terms along with Molarity (M). Is there any way you guys distinguish these terms? Thank you in advance!
Fri Jun 30, 2017 9:53 am
Forum: Balancing Chemical Reactions
Topic: Leaving Balanced equations in half
Replies: 2
Views: 322

### Leaving Balanced equations in half

In class, we were given the example:
C4H10 + O2 --> CO2 + H2
and we got the balanced equation C4H10 + 13/2 O2 --> 4 CO2 + 5 H2O
My question is, are we able to leave it that way or do we have multiply 2 to the whole equation to eliminate the 2 from the 13/2?
Fri Jun 30, 2017 9:48 am
Forum: Balancing Chemical Reactions
Topic: Order of molecules balanced
Replies: 6
Views: 648

### Re: Order of molecules balanced

An order I follow that helps me when I balance equations is balancing in order from left to right : C H O. I balance Carbon, Hydrogen, and oxygen last. I hope this helps!
Fri Jun 30, 2017 9:35 am
Forum: Limiting Reactant Calculations
Topic: Limiting Reaction Question- Getting different answer
Replies: 9
Views: 913

### Re: Limiting Reaction Question- Getting different answer

Hello! After we convert the grams to mols and divide all answers by the smallest answer, do we always have to multiply our numbers by a number to get an answer closest to a whole number? For example: I have 2.67 mol of Carbon, 2.67 mol of Hydrogen, and 1.97 mol of Oxygen I multiplied these numbers b...
Fri Jun 30, 2017 9:20 am
Forum: Properties of Light
Topic: Exercise 1.23 Pg 27 Ch 1
Replies: 2
Views: 258

### Exercise 1.23 Pg 27 Ch 1

I am having trouble figuring out how to modify the formulas c/nu= lambda and e/h=nu to figure out a problem. For example, The y-ray photons emitted by the nuclear decay of a technetium-99 atom used in radio pharmaceuticals have an energy of 140.11 KeV. Calculate the wavelength of y-rays. Given: 1eV=...