Search found 59 matches
- Sat Mar 16, 2019 1:50 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3000669
Re: Post All Chemistry Jokes Here
All the good Chemistry jokes Argon :(
- Sat Mar 16, 2019 1:49 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3000669
Re: Post All Chemistry Jokes Here
Are you made out of Copper and Tellurium? Because you're CuTe!
- Sat Mar 16, 2019 1:48 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3000669
Re: Post All Chemistry Jokes Here
OMG did you know that Oxygen and Magnesium were a couple?
- Sat Mar 16, 2019 1:46 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Steady State Equilibirum
- Replies: 2
- Views: 344
- Sat Mar 16, 2019 1:44 am
- Forum: Second Order Reactions
- Topic: does the order determine molecularity?
- Replies: 7
- Views: 892
- Sat Mar 16, 2019 1:44 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Cp vs Cv
- Replies: 6
- Views: 1960
Re: Cp vs Cv
Don't worry about it, they will tell you in the question :)
- Sat Mar 16, 2019 1:42 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: vertical line in cell diagram
- Replies: 4
- Views: 478
Re: vertical line in cell diagram
No, only use the vertical line for solids
- Sat Mar 16, 2019 1:40 am
- Forum: General Rate Laws
- Topic: Final
- Replies: 9
- Views: 1049
Re: Final
I think you should just be careful with sig figs on the final just to be safe! I don't think it would be stressed that much, though.
- Sat Mar 16, 2019 1:39 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst
- Replies: 14
- Views: 1178
Re: Nernst
Yup!
- Sat Mar 16, 2019 1:38 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Equation
- Replies: 9
- Views: 1251
Re: Equation
Yes, assume A=1 unless otherwise stated.
- Sat Mar 16, 2019 1:37 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anode and Cathode
- Replies: 14
- Views: 939
Re: Anode and Cathode
Cathode is always on the right side of a cell diagram and anode is always on the left side.
- Sat Mar 16, 2019 1:36 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Ka Kb = Kw
- Replies: 5
- Views: 859
Re: Ka Kb = Kw
You can use it to find the pH of a solution.
- Sat Mar 16, 2019 1:34 am
- Forum: Student Social/Study Group
- Topic: Studying for the Final
- Replies: 25
- Views: 2705
Re: Studying for the Final
I just found out that there's a past final online!
http://www.bruintestbank.com/chemistry/ ... lavalle-1/
http://www.bruintestbank.com/chemistry/ ... lavalle-1/
- Sat Mar 16, 2019 1:32 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta U
- Replies: 4
- Views: 684
Re: delta U
Yes, always add q and w!
- Sat Mar 16, 2019 1:30 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Ecell
- Replies: 4
- Views: 526
Re: Ecell
Yes, if you calculate the Ecell by adding the Ecathode and the Eanode together, you need to change the sign of Eanode.
- Sat Mar 16, 2019 1:28 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: H+ in Cell Diagram
- Replies: 3
- Views: 375
Re: H+ in Cell Diagram
Always include H+
- Sat Mar 16, 2019 1:28 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Rate of formation, rate in terms of loss
- Replies: 3
- Views: 446
Re: Rate of formation, rate in terms of loss
These phrases do not mean the same thing
- Sat Mar 16, 2019 1:06 am
- Forum: Administrative Questions and Class Announcements
- Topic: Deriving
- Replies: 3
- Views: 654
Re: Deriving
Yeah, I believe your expectation is correct.
- Sat Mar 16, 2019 1:04 am
- Forum: Administrative Questions and Class Announcements
- Topic: Past Finals
- Replies: 4
- Views: 839
Re: Past Finals
Thank you so much this post really helped me!
- Sat Mar 16, 2019 12:59 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Cell Work
- Replies: 4
- Views: 627
Re: Cell Work
Use the nFE formula
- Sat Mar 16, 2019 12:51 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Units
- Replies: 1
- Views: 228
Re: Units
kJ/mol
- Sat Mar 16, 2019 12:50 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: applying Le Chatelier's Principle
- Replies: 4
- Views: 760
Re: applying Le Chatelier's Principle
This link helped me a lot with Le Chatelier's, hope it helps you out too! https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwj0udDplYbhAhUZGDQIHYFHDMgQjRx6BAgBEAU&url=https%3A%2F%2Fsocratic.org%2Fquestions%2Fwhat-is-le-chatelier-s-principle-in-chemist...
- Sat Mar 16, 2019 12:45 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law Problem (8.55 in the Sixth Edition)
- Replies: 2
- Views: 547
Re: Hess's Law Problem (8.55 in the Sixth Edition)
We must always make sure our equations are balanced first before we do anything else. Since there were 3 Oxygens in the products side, we must multiply Oxygen by 3/2 to balance the equation.
- Sat Mar 16, 2019 12:31 am
- Forum: *Enzyme Kinetics
- Topic: what will we be given ?
- Replies: 3
- Views: 683
Re: what will we be given ?
I wouldn't worry about it! We will always be given enough to solve the problem.
- Sat Mar 16, 2019 12:27 am
- Forum: *Enzyme Kinetics
- Topic: How do you tell if something is a catalyst vs an intermediate?
- Replies: 16
- Views: 5731
Re: How do you tell if something is a catalyst vs an intermediate?
In the first step, a catalyst is a reactant and the intermediate is a product.
- Sat Mar 16, 2019 12:24 am
- Forum: Zero Order Reactions
- Topic: writing rate
- Replies: 2
- Views: 481
Re: writing rate
Either is fine!
- Sat Mar 16, 2019 12:23 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Exothermic vs Endothermic
- Replies: 6
- Views: 632
Re: Exothermic vs Endothermic
Yes, you are correct @hanna_maillard3B
- Sat Mar 16, 2019 12:17 am
- Forum: *Enzyme Kinetics
- Topic: sig figs on the final
- Replies: 2
- Views: 550
Re: sig figs on the final
I would try to check your sig figs just in case!
- Thu Dec 06, 2018 10:28 pm
- Forum: Naming
- Topic: Naming with bis-
- Replies: 5
- Views: 527
Re: Naming with bis-
Yes, you need to write bis- because the ligand includes a di-.
- Thu Dec 06, 2018 10:24 pm
- Forum: Bronsted Acids & Bases
- Topic: Glucose as an acid
- Replies: 3
- Views: 284
Re: Glucose as an acid
I agree with the person above. I don't think it is either.
- Thu Dec 06, 2018 10:23 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: S orbitals lower energy than p orbitals
- Replies: 2
- Views: 2790
Re: S orbitals lower energy than p orbitals
electrons in the p field further away from the nucleus, which causes a higher nuclear attraction, since more distance requires more energy to pull it together.
- Thu Dec 06, 2018 10:21 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Final Exam
- Replies: 7
- Views: 661
Re: Final Exam
Yes we do!
- Thu Dec 06, 2018 10:20 pm
- Forum: Amphoteric Compounds
- Topic: BaO
- Replies: 5
- Views: 1775
Re: BaO
You're right, the book's answer is wrong
- Thu Dec 06, 2018 10:14 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric vs Amphiprotic
- Replies: 4
- Views: 838
Re: Amphoteric vs Amphiprotic
amphoteric --> can act as acid or base.
amphiprotic--> can donate or accept protons/hydrogen
amphiprotic--> can donate or accept protons/hydrogen
- Thu Dec 06, 2018 10:13 pm
- Forum: Naming
- Topic: Final Exam
- Replies: 9
- Views: 831
Re: Final Exam
I think we should just memorize it to be safe!
- Thu Dec 06, 2018 10:12 pm
- Forum: Lewis Acids & Bases
- Topic: Strong Acids
- Replies: 6
- Views: 613
Re: Strong Acids
yes, HF is weaker than HI. longer bond = weaker
- Thu Dec 06, 2018 10:10 pm
- Forum: Bronsted Acids & Bases
- Topic: donating or accepting proton
- Replies: 2
- Views: 327
- Thu Dec 06, 2018 10:09 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Size and Polarizability
- Replies: 4
- Views: 655
Re: Size and Polarizability
number of electrons
- Thu Dec 06, 2018 10:04 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pH calculation
- Replies: 4
- Views: 537
Re: pH calculation
The molarity is usually given to you!
- Thu Dec 06, 2018 10:04 pm
- Forum: Properties of Light
- Topic: Speed of light
- Replies: 13
- Views: 3840
Re: Speed of light
I haven't had any issues with using 3.0 x 10^8, I think you should be able to use this!
- Fri Nov 09, 2018 2:01 pm
- Forum: Bond Lengths & Energies
- Topic: boiling points
- Replies: 4
- Views: 416
Re: boiling points
Compounds with stronger intramolecular forces will have higher boiling points, because it will be harder to break apart those bonds. Meanwhile, compounds with weaker intramolecular forces will have lower boiling points, because it doesn't take as much work to break apart those bonds.
- Fri Nov 09, 2018 1:58 pm
- Forum: SI Units, Unit Conversions
- Topic: Angstrom
- Replies: 5
- Views: 921
Re: Angstrom
No, but I think Lavelle expects us to know its conversion.
- Fri Nov 09, 2018 1:57 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent Bonds
- Replies: 18
- Views: 1734
Re: Ionic vs Covalent Bonds
Ionic--> transfer of electrons, covalent--> sharing of electrons
- Sun Nov 04, 2018 10:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: chem test tmrw
- Replies: 6
- Views: 678
Re: chem test tmrw
Yes, we get the formula sheet that we always get on tests :)
- Sun Nov 04, 2018 10:34 pm
- Forum: Electronegativity
- Topic: Periodic Trends
- Replies: 10
- Views: 1192
Re: Periodic Trends
For me, for electronegativity, I just remember that Fluorine is the most electronegative element.
- Sun Nov 04, 2018 10:33 pm
- Forum: Properties of Electrons
- Topic: Electron Configuration
- Replies: 9
- Views: 1113
Re: Electron Configuration
Yes, I think it should be [Kr]4d^10
- Sun Nov 04, 2018 9:18 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 8
- Views: 737
Re: Formal Charge
v= valence electrons, l= lone pairs, s= shared electrons
- Sun Nov 04, 2018 9:16 pm
- Forum: Ionic & Covalent Bonds
- Topic: Test bank?
- Replies: 9
- Views: 2409
Re: Test bank?
there aren't any tests in the test bank :(
- Sun Nov 04, 2018 8:57 pm
- Forum: Ionic & Covalent Bonds
- Topic: Chem Midterm
- Replies: 13
- Views: 1090
Re: Chem Midterm
eight free response questions!
- Fri Oct 19, 2018 3:46 am
- Forum: DeBroglie Equation
- Topic: Rest Mass
- Replies: 7
- Views: 672
Re: Rest Mass
No, there are things that you cannot use De Broglie's equation on because they do not have rest mass. You can only use De Broglie's equation on things that have rest mass.
- Fri Oct 19, 2018 3:08 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Video Modules
- Replies: 7
- Views: 730
Re: Video Modules
He hasn't uploaded any new modules yet that I know of.
- Fri Oct 19, 2018 3:03 am
- Forum: DeBroglie Equation
- Topic: Energy=pc
- Replies: 4
- Views: 530
Re: Energy=pc
In the equation for kinetic energy, mass is not squared. Only velocity is.
- Fri Oct 12, 2018 1:58 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Shells?
- Replies: 7
- Views: 909
Re: Shells?
I know that the s-, p-, d-, and f- represent how many electrons can fit in a certain shell, but would anyone also know why they're specifically labelled those letters? Does it stand for something ? The letters stand for sharp, principal, diffuse, and fundamental, but I wouldn't worry about knowing ...
- Fri Oct 12, 2018 1:09 am
- Forum: Properties of Light
- Topic: speed of light
- Replies: 8
- Views: 651
Re: speed of light
I think 3.0 x 10^8 is fine!
- Fri Oct 12, 2018 1:07 am
- Forum: Balancing Chemical Reactions
- Topic: question on "combustion" and "cooking"
- Replies: 3
- Views: 638
Re: question on "combustion" and "cooking"
Yes, I think we are supposed to know that the formula for the combustion of a molecule would be:
tha molecule + _O2 --> _H2O + _CO2.
tha molecule + _O2 --> _H2O + _CO2.
- Fri Oct 05, 2018 7:17 am
- Forum: Limiting Reactant Calculations
- Topic: When to use H vs H2
- Replies: 7
- Views: 1031
Re: When to use H vs H2
I think you will have to multiply the molar mass of Hydrogen by two.
- Thu Oct 04, 2018 11:06 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Accuracy and Precision
- Replies: 4
- Views: 462
Re: Accuracy and Precision
High accuracy is when your data results from your lab are close to the number that you were expecting to get from your prediction/calculation beforehand (how "right" your data results are,) even if your results only hit that "right" number only three times out of seven trials. Hi...
- Thu Oct 04, 2018 10:36 pm
- Forum: Empirical & Molecular Formulas
- Topic: Writing Out Chemical Equation
- Replies: 2
- Views: 260
Re: Writing Out Chemical Equation
When writing out chemical compounds, the element with the positive charge always goes first. Hope this helps!
- Thu Oct 04, 2018 10:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3000669
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0k?