## Search found 53 matches

Sun Mar 18, 2018 2:14 am
Forum: Balancing Redox Reactions
Topic: test 2
Replies: 5
Views: 495

### test 2

what was the answer to question 7 on the test?
Sat Mar 17, 2018 8:05 pm
Forum: Phase Changes & Related Calculations
Topic: Steam
Replies: 7
Views: 757

### Re: Steam

steam at 100 C has lots more energy than water at 100 c since it requires more energy to have the phase change from liquid to gas
Sat Mar 17, 2018 8:04 pm
Forum: Phase Changes & Related Calculations
Topic: Steam
Replies: 7
Views: 757

### Re: Steam

steam at 100 C has lots more energy than water at 100 c since it requires more energy to have the phase change from liquid to gas
Sat Mar 17, 2018 7:26 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Test 2 Question 8 Part B
Replies: 2
Views: 246

### Re: Test 2 Question 8 Part B

For this one Q= [H+]^s[HCl]^2/[Pressure of H2]
Sat Mar 17, 2018 6:12 am
Forum: Balancing Redox Reactions
Topic: Test 2
Replies: 2
Views: 274

### Re: Test 2

I believe that a) 3+ and b)Fe is being oxidized
Sat Mar 17, 2018 6:03 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Bomb Calorimeter
Replies: 6
Views: 549

### Re: Bomb Calorimeter

it is an isolated system which means that the volume is constant and matter and energy can not be exchanged
Sat Mar 17, 2018 6:00 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

what is the atomic symbol of confusion?

Um
Sat Mar 17, 2018 2:46 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: explanation of q
Replies: 1
Views: 239

### explanation of q

so in the book q=C(deltaT), on the equations given for the tests, there is an equation that gives q=nC(deltaT). How do you get the n inserted? the only equation that I can come up with is q=n(Cmolar)(deltaT) with an n value.
Fri Mar 16, 2018 7:42 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much?
They're cheaper than day rates.
Fri Mar 16, 2018 4:11 am
Forum: General Science Questions
Replies: 8
Views: 966

Is there a curve to the class, and what percent would give an A?
Fri Mar 16, 2018 4:10 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

I slapped my neon that one
Fri Mar 16, 2018 3:58 am
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Test 3
Replies: 1
Views: 259

### Test 3

Did anyone get mother second one on the test? What is the correct way to do it
Fri Mar 16, 2018 3:56 am
Forum: General Science Questions
Topic: Class [ENDORSED]
Replies: 3
Views: 468

### Class[ENDORSED]

Is there class on3/16/18
Tue Mar 06, 2018 10:09 pm
Forum: General Rate Laws
Topic: 15.8 The Rate Laws of Elementary Reactions
Replies: 1
Views: 164

### 15.8 The Rate Laws of Elementary Reactions

How do you determine which reaction is the slowest and when to add or subtract it from the others. Basically, I need help understanding all of 15.8.
Sun Mar 04, 2018 11:06 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: 15.23 c) HW
Replies: 2
Views: 168

### 15.23 c) HW

how would I solve 15.3 part C?
Sun Mar 04, 2018 11:03 pm
Forum: General Rate Laws
Topic: Negative Order 15.3
Replies: 2
Views: 198

### Negative Order 15.3

when can the rate law be negative such as on pg 621?
Sun Mar 04, 2018 11:02 pm
Forum: General Rate Laws
Topic: Units for Rate Laws 15.3
Replies: 2
Views: 181

### Units for Rate Laws 15.3

what are the proper units for here, first, and second rate law orders?
Sun Feb 18, 2018 10:09 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Nernst equation
Replies: 4
Views: 359

### Re: Nernst equation

Ecell=Ecell*-RTlnQ/nrF
Sun Feb 18, 2018 10:06 pm
Forum: Balancing Redox Reactions
Topic: Writing cell diagram and reaction equation
Replies: 3
Views: 236

### Writing cell diagram and reaction equation

How do you write each of these when given the other, and how do you determine what's on the left and right side, and what is the cathode and anode?
Sun Feb 18, 2018 10:00 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Example 14.8 (pg 586)
Replies: 1
Views: 146

### Example 14.8 (pg 586)

Why is it that when you switch the half redox equation from Ag^+ + e= Ag to Ag= Ag^+ +e the E=+0.80V doesn't also switch to E=-0.80
Tue Feb 13, 2018 1:05 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Test 1 question 7
Replies: 1
Views: 173

### Test 1 question 7

Did anyone get the worked out answer for question 7?
Tue Feb 13, 2018 1:04 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Test 1 question 6
Replies: 1
Views: 165

### Test 1 question 6

How do you work out and get the answer to question 6 on the test?
Tue Feb 06, 2018 1:43 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Sun Feb 04, 2018 11:02 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Delta S vs Delta U [ENDORSED]
Replies: 5
Views: 1084

### Delta S vs Delta U[ENDORSED]

Can someone explain the difference between delta S and delta U, and when and how to use each one?
Sun Feb 04, 2018 11:00 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Test question [ENDORSED]
Replies: 16
Views: 909

### Re: Test question[ENDORSED]

Energy can not be created nor destroyed
Sun Feb 04, 2018 10:58 pm
Forum: Calculating Work of Expansion
Topic: 8.9
Replies: 2
Views: 244

### Re: 8.9

The answer is supposed to be in an energy unit, it's just a conversion to get the answer in Joules and cancel out any unnessasary units
Sun Feb 04, 2018 10:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 5
Views: 429

### Midterm

What topics and sections will be covered for the midterm?
Mon Jan 22, 2018 1:24 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

What is the chemical formula for banana?
BaNa2
Mon Jan 22, 2018 1:23 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much?
They are cheaper than day rates
Sat Jan 20, 2018 6:38 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 8.5 specific heat capacity vs molar heat capacity?
Replies: 1
Views: 167

### 8.5 specific heat capacity vs molar heat capacity?

In the book it shows that q=cΔT=mCsΔT and q=nCmΔT, would this also mean that q=CΔT=nCmΔT? If not, then why is that?
Sat Jan 13, 2018 5:08 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

I had to make this bad chemistry joke because all the good ones argon
Sat Jan 13, 2018 5:06 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Did you hear about the man that got cold down to absolute zero?
He’s oK now
Sat Jan 13, 2018 5:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

You can’t trust atoms, they make everything up
Sun Dec 10, 2017 4:41 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Did you hear that oxygen went on a date with potassium? It went OK
Sat Dec 09, 2017 2:40 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: The Values of K and their Limitations
Replies: 1
Views: 244

### The Values of K and their Limitations

For Ch. 11, I was told that K can only be used for gases and any solid or liquid could not be put into the equation. Is this true for Kc and all the other K values in Ch. 12, or do another set of rules govern both Kc and Ch. 12 K constant values?
Sat Dec 09, 2017 1:26 am
Forum: Ideal Gases
Topic: Hw 11.41
Replies: 1
Views: 279

### Hw 11.41

kc=([co2][NH3]^2)/[NH4(NH2CO2)] when the second is the proper formula for the kc constant
Thu Dec 07, 2017 4:54 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Hw 12.55
Replies: 2
Views: 153

### Hw 12.55

Why is it than in a) the x^2/(.2-x)=ka becomes (.2)ka=x^2 but in b) x^2/(.2-x)=ka becomes
(.2-x)ka=x^2

In one case, the x in (.2-x) is assumed to be zero and in the other, it’s assumed to have a value. Why is that?
Thu Dec 07, 2017 4:13 am
Forum: Amphoteric Compounds
Topic: Amphoteric vs amphiprotic
Replies: 2
Views: 660

### Amphoteric vs amphiprotic

What is the difference between the two, and what do each mean/ tell?
Thu Dec 07, 2017 4:10 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Wed Dec 06, 2017 5:14 pm
Forum: Bronsted Acids & Bases
Topic: What is meant by acids and bases?
Replies: 2
Views: 200

### What is meant by acids and bases?

In chapter 12, when the book refers to acids and bases, which definition of acids and bases does it refer to? If it is referring to another type, will it state the specific definition of an acid and base it is talking about?
Tue Dec 05, 2017 6:32 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Acid and Base equations
Replies: 2
Views: 259

### Acid and Base equations

What is the difference between the overall equation, complete ionic equation, and the net ionic equation and how do you do each?
Sat Dec 02, 2017 11:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Final [ENDORSED]
Replies: 6
Views: 632

### Final[ENDORSED]

What chapter will the final most heavily emphasize?
Sat Dec 02, 2017 11:45 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH and pOH
Replies: 10
Views: 766

### pH and pOH

What is the difference between pH and pOH, what do they do, and how do you calculate them?
Sat Dec 02, 2017 11:40 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

That was sodium funny
Fri Nov 24, 2017 3:07 am
Forum: Administrative Questions and Class Announcements
Topic: What is a passing grade? [ENDORSED]
Replies: 4
Views: 537

### What is a passing grade?[ENDORSED]

In the syllabus it states that we need at least a 50% to pass the class. What letter grade does that guarantee, and is there any sort of curve in for chem 14a?
Sun Nov 19, 2017 6:27 pm
Forum: DeBroglie Equation
Topic: Midterm Question: wavelike properties
Replies: 6
Views: 425

### Re: Midterm Question: wavelike properties

That the wavelength is able to be measured in an experiment. Large objects do not have measurable wavelike properties
Sun Nov 19, 2017 6:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar ve non polar [ENDORSED]
Replies: 7
Views: 554

### Polar ve non polar[ENDORSED]

Is determining if a molecule is polar or non polar just trying to figure out if the overall effect of the charge is equal in all directions, and if so then it it non polar but if not then it's polar?
Fri Nov 10, 2017 3:59 pm
Forum: Lewis Structures
Topic: Lewis structure
Replies: 4
Views: 331

### Lewis structure

How do you know what atom is going to be the center atom, or when two atoms will alternate?
Fri Nov 10, 2017 3:55 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

What kind of dogs do chemists have?
Laboratory retreavers
Sun Nov 05, 2017 11:00 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shell, subshell, and orbital
Replies: 5
Views: 468

### Shell, subshell, and orbital

What are the maximum and minimum allowable numbers for n, l, and ml. How do I determine this? And if l=3 then does that mean ml= -3, -2, -1, 0, 1, 2, 3?
Sun Nov 05, 2017 10:52 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals of subshell
Replies: 3
Views: 205

### Orbitals of subshell

How do we find ml and what does it tell us? And how to determine an acceptable ml
Sat Oct 14, 2017 2:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8200
Views: 1432140

### Re: Post All Chemistry Jokes Here

Mom when she's mad: "I've got my ion you"
Sat Oct 14, 2017 2:45 pm
Forum: Empirical & Molecular Formulas
Topic: What order do the atoms go in [ENDORSED]
Replies: 1
Views: 238

### What order do the atoms go in[ENDORSED]

How are you able to tell which order to put the atoms in when writing out a chemical equation. An example would be sucrose with a C12H22O11, why would it not be H22O11C12. What dictates the order the atoms go in for this molecule and all the others?