Search found 24 matches

by Alexa_Kwang_1D
Sun Mar 19, 2017 9:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

What was the charge when NaCl was arrested?
A salt
by Alexa_Kwang_1D
Mon Mar 13, 2017 1:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

Why did the acid go to the gym?

To become a buffer solution!
by Alexa_Kwang_1D
Sat Mar 11, 2017 2:17 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

Why does a hamburger have lower energy than a steak?
It's in the ground state!
by Alexa_Kwang_1D
Mon Mar 06, 2017 4:07 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

You must be made of uranium and iodine because all I see is U and I
by Alexa_Kwang_1D
Wed Mar 01, 2017 2:12 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

What do you call iron blowing in the wind?

Febreeze
by Alexa_Kwang_1D
Thu Feb 23, 2017 5:39 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

What happened to the man who was stopped for having sodium chloride and a nine-volt in his car?

He was booked for a salt and battery.
by Alexa_Kwang_1D
Tue Feb 21, 2017 1:57 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

If H2O is water, what is H2O4?

Drinking, bathing, washing, swimming, etc.
by Alexa_Kwang_1D
Thu Feb 09, 2017 7:19 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Potential Difference
Replies: 1
Views: 207

Re: Potential Difference

Potential difference, also known as voltage, is the difference in electric potential between the two electrodes and is equal to the work done per unit of charge against an electric field to move a charge between the electrodes. Negatively charged particles are pulled towards higher potential differe...
by Alexa_Kwang_1D
Wed Feb 01, 2017 9:58 am
Forum: General Science Questions
Topic: Sig Figs
Replies: 3
Views: 456

Re: Sig Figs

I would because sometimes numbers in tables are approximations or are not the most precise so you need to account for that.
by Alexa_Kwang_1D
Wed Jan 25, 2017 6:46 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Degeneracy of Isolated System
Replies: 1
Views: 287

Re: Degeneracy of Isolated System

According to the 2nd law of thermodynamics, entropy (and thus correlation) is never decreasing in an isolated system. If it has reached equilibrium than it is not increasing either, so it must be at its max.
by Alexa_Kwang_1D
Wed Jan 25, 2017 6:38 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Why is the oxygen (1/2)02instead of 02?
Replies: 2
Views: 442

Re: Why is the oxygen (1/2)02instead of 02?

You said 1/2 O2 because your primary goal is forming only ONE mole of the product (H2O or CO2). If you use 1 O2, more than one mole of product would be formed.
by Alexa_Kwang_1D
Thu Jan 19, 2017 6:19 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated Systems [ENDORSED]
Replies: 2
Views: 381

Re: Isolated Systems [ENDORSED]

soup that is poured into a completely insulated container with a lid so no heat or material can be exchanged (thermoflask if it worked perfectly; realistically thermoflasks are not completely insulated so not completely isolated), insulated gas tank, the universe(?)
by Alexa_Kwang_1D
Sun Jan 15, 2017 5:44 pm
Forum: Phase Changes & Related Calculations
Topic: Constant P vs Constant V Calorimetry [ENDORSED]
Replies: 4
Views: 516

Re: Constant P vs Constant V Calorimetry [ENDORSED]

I'm guessing Constant P calorimetry is when you keep pressure constant and Constant V calorimetry is when you keep volume constant. You would thus use different types of calorimeters because different calorimeters hold constant different things and would fulfill different conditions.
by Alexa_Kwang_1D
Sun Dec 04, 2016 1:20 pm
Forum: Properties of Light
Topic: Fall 2016 Midterm #2B
Replies: 1
Views: 349

Fall 2016 Midterm #2B

The energy required to break a C-C bond in a molecule is 348 kj/mol. Will visible light be able to break this bond?

For this question, do we have to convert 348 kj/mol to kj/molecule because the question is referring to a single molecule?
by Alexa_Kwang_1D
Mon Nov 28, 2016 11:25 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Sig Figs for Logarithms and Exponents
Replies: 2
Views: 405

Re: Sig Figs for Logarithms and Exponents

I learned it as the number of sigfigs of the H30+ concentration is the number of digits after the decimal of the pH. So -log[0.0652]=1.186.
by Alexa_Kwang_1D
Fri Nov 18, 2016 9:06 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE box
Replies: 2
Views: 345

Re: ICE box

Correct me if I'm wrong, but I would think that you would omit the solids and liquids from the ICE box because they are not included in the equilibrium equation.
by Alexa_Kwang_1D
Mon Nov 14, 2016 2:17 pm
Forum: Ideal Gases
Topic: Ideal Gas Law and Equilibrium Constant
Replies: 7
Views: 745

Re: Chemical Equilibrium Part 3 Module

Wait how do you solve that second problem without knowing the equilibrium constant?
by Alexa_Kwang_1D
Sun Nov 06, 2016 8:11 pm
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 4
Views: 577

Re: Hybrid Orbitals

You can find hybridization by counting the number of atoms bonded to the atom you're examining and the number of lone pairs the atom has (regions of electron density). You don't subtract 1 from that sum because you are not using "sp" as a unit (sp^3 is not 3 sp's). "S" is a separ...
by Alexa_Kwang_1D
Thu Oct 27, 2016 11:35 am
Forum: Hybridization
Topic: sigma and pi bonds
Replies: 3
Views: 413

Re: sigma and pi bonds

No, sigma bonds are not limited to just those pairs of orbitals. A sigma bond is just defined as being formed by head-on overlapping between orbitals, meaning other orbitals (ex. dz2 - dz2) can also have sigma bonds.
by Alexa_Kwang_1D
Mon Oct 24, 2016 12:54 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7610
Views: 1020562

Re: Post All Chemistry Jokes Here

What did the student who failed chemistry say?
If I had electrons I would have an octet because I don't do chemistry.
by Alexa_Kwang_1D
Sun Oct 16, 2016 2:47 pm
Forum: Trends in The Periodic Table
Topic: Homework problem Ch2 67
Replies: 4
Views: 373

Re: Homework problem Ch2 67

Yes, a half-filled p sub-shell (that carbon would have) is more stable than having four electrons in the p sub-shell (that nitrogen would have). The fourth electron in nitrogen's p sub-shell would be paired with another electron in the same orbital, and the slight repulsion between the two electrons...
by Alexa_Kwang_1D
Tue Oct 04, 2016 4:06 pm
Forum: Properties of Light
Topic: Wave Particle Duality [ENDORSED]
Replies: 1
Views: 319

Re: Wave Particle Duality [ENDORSED]

I think it should because c=\lambda \nu is based on the the description of light as a wave and E=h\nu is based on the description of light as particles (since it describes the energy of a photon). The ability to combine the two into E=\frac{hc}{\lambda } should reflect the wave-particle duality of l...
by Alexa_Kwang_1D
Sun Oct 02, 2016 6:09 pm
Forum: Properties of Light
Topic: Question about n1 and n2
Replies: 4
Views: 1276

Re: Question about n1 and n2

Yes n1 is the initial energy level and n2 is the final energy level. Both n1 and n2 are integers (1, 2, 3, 4...) and n2>n1.
by Alexa_Kwang_1D
Sun Sep 25, 2016 10:46 am
Forum: Limiting Reactant Calculations
Topic: Limiting Reactants & Limiting Reagents [ENDORSED]
Replies: 7
Views: 1791

Re: Limiting Reactants & Limiting Reagents [ENDORSED]

Pretty sure it's typically a matter of sig figs given in the question.

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