Search found 20 matches

by giareyes_2B
Fri Mar 17, 2017 10:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7437
Views: 987403

Re: Post All Chemistry Jokes Here

Q: What's the name of the molecule CH2O?
A: Seawater
by giareyes_2B
Fri Mar 17, 2017 10:51 pm
Forum: *Cycloalkenes
Topic: 2013 FINAL Q6A
Replies: 4
Views: 693

Re: 2013 FINAL Q6A

For this same problem, why is the 1 Carbon identified as being sp2? I thought sp2 meant 3 areas of electron density, but by this reasoning shouldn't carbons 2 and 3 be circled since they both have 3 bonds?
by giareyes_2B
Fri Mar 17, 2017 10:37 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 2013 Final Q3C
Replies: 1
Views: 235

2013 Final Q3C

For part C of Question #3 how did we calculate the concentration of the H+?
by giareyes_2B
Fri Mar 17, 2017 10:32 pm
Forum: Balancing Redox Reactions
Topic: 2013 Final Q3A
Replies: 1
Views: 203

2013 Final Q3A

I'm confused on how we got the E values for each of the half reactions. Will they be given and then we determine which is the anode and which is the cathode, or is there a way to calculate the values?
by giareyes_2B
Fri Mar 17, 2017 10:22 pm
Forum: *Alkanes
Topic: Neo- vs. Tert-
Replies: 5
Views: 703

Neo- vs. Tert-

When naming hydrocarbons, do the prefixes tert- and neo- mean the same thing? I know neo- is (CH3)3C-, but on page 96 of the course reader the part of the structure named tert- resembles the same formula to me. If they are the same, is there a specific time when we should use either?
by giareyes_2B
Fri Mar 17, 2017 10:17 pm
Forum: *Cycloalkanes
Topic: Cycloalkanes
Replies: 1
Views: 452

Cycloalkanes

I know that 5 and 6 Carbon rings are the most common because they are the most stable, but what makes them the most stable in comparison to other cycloalkanes?
by giareyes_2B
Fri Mar 17, 2017 10:16 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Concentration Cells
Replies: 3
Views: 330

Concentration Cells

In a concentration cell, why do you need the product concentration to be lower than the reactants? Is it because that would favor a forward reaction rather than a reverse reaction?
by giareyes_2B
Fri Mar 17, 2017 10:13 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Electrolysis
Replies: 5
Views: 679

Electrolysis

When it's said that electrolysis uses electron current to drive a non-spontaneous redox reaction, what does this mean? How exactly is the electron current being used to drive it?
by giareyes_2B
Sun Feb 05, 2017 9:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7437
Views: 987403

Re: Post All Chemistry Jokes Here

Q: What did the scientist say when he found 2 isotopes of helium?
A: HeHe
by giareyes_2B
Sun Jan 22, 2017 10:28 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Boltzmann Equation
Replies: 1
Views: 222

Boltzmann Equation

On page 28 of the course reader it says (at least from what I understand) that in the Boltzmann Equation a large error in W means there will be a small error in S. Can someone explain this further please?
by giareyes_2B
Sun Dec 04, 2016 12:45 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 2015 final Q7A
Replies: 1
Views: 305

2015 final Q7A

This question asks to calculate the ratio of bicarbonate to carbonic acid, assuming a pH of 7.4. I understand how we get the concentration of H3O+, but I get lost on how we continue to get the ratio of 20:1. Can someone elaborate on this?
by giareyes_2B
Sat Dec 03, 2016 10:50 pm
Forum: Ionic & Covalent Bonds
Topic: ionic character
Replies: 2
Views: 786

ionic character

How do you determine which compound has bonds with greater ionic character? In the 2015 final Q3E, it asks between CO2 and CS2. I know that the greater the difference in electronegativity = greater ionic character, but isn't there a greater difference in CS2 instead of CO2?
by giareyes_2B
Sat Dec 03, 2016 7:42 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Calculating x at equilibrium
Replies: 2
Views: 300

Re: Calculating x at equilibrium

I believe that you can assume that x=0 is correct if the value you got for x is less than 5% of the value you were subtracting it from. For example, you would take whatever value you got for x, and then divide it by .0600. If the percentage you get is less than 5%, then you should be fine in assuming.
by giareyes_2B
Sat Nov 26, 2016 3:45 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7437
Views: 987403

Re: Post All Chemistry Jokes Here

What Is the chemical formula for banana?

BaNa2
by giareyes_2B
Sun Nov 13, 2016 10:24 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma & Pi Bonds
Replies: 1
Views: 226

Sigma & Pi Bonds

Can someone please explain the reasoning behind why sigma bonds have a lower energy than pi bonds?
by giareyes_2B
Fri Nov 04, 2016 4:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7437
Views: 987403

Re: Post All Chemistry Jokes Here

Q: What is "HIJKLMNO"?

A: H2O.
by giareyes_2B
Fri Oct 28, 2016 7:49 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7437
Views: 987403

Re: Post All Chemistry Jokes Here

How many moles are in a guacamole?

Avocado's number.
by giareyes_2B
Mon Oct 17, 2016 3:47 pm
Forum: Resonance Structures
Topic: Resonance and Energy [ENDORSED]
Replies: 2
Views: 367

Resonance and Energy [ENDORSED]

Can someone please explain how exactly resonance lowers a molecule's energy/makes it more stable?
by giareyes_2B
Fri Oct 14, 2016 2:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7437
Views: 987403

Re: Post All Chemistry Jokes Here

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
by giareyes_2B
Fri Oct 07, 2016 11:33 pm
Forum: DeBroglie Equation
Topic: Post Module Question
Replies: 1
Views: 315

Post Module Question

If an electron (mass 9.11 x 10^-31 kg) has an associated wavelength of 7.28 x 10^-9m, what is its speed?

I am using the wavelength=h/(mv) equation to find the velocity but I can' t seem to get the right answer. Am i approaching this problem incorrectly?

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