Search found 53 matches

by Jesus Rodriguez 1J
Sat Mar 17, 2018 11:18 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Little Johnny had a drink
But now he'll drink no more
For what he thought was H2O was H2SO4
by Jesus Rodriguez 1J
Sat Mar 17, 2018 11:14 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

-What do you call a tooth in a glass of water? A one molar solution.
by Jesus Rodriguez 1J
Thu Mar 15, 2018 7:38 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.63
Replies: 1
Views: 88

15.63

Can someone please explain where the solution manual got the -.59 from?
by Jesus Rodriguez 1J
Mon Mar 12, 2018 12:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Question: What's a pirate's favorite element?

Answer: Gold (Bet you thought I was gonna say Arrrgon)
by Jesus Rodriguez 1J
Mon Mar 12, 2018 11:58 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

I told a joke to a guy named Helium, he didn't react.
by Jesus Rodriguez 1J
Mon Mar 05, 2018 9:17 pm
Forum: Second Order Reactions
Topic: 15.35a
Replies: 1
Views: 113

15.35a

Can someone explain how the solution manual got 1/A = 16/Ao?
by Jesus Rodriguez 1J
Sun Mar 04, 2018 6:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Q: What is a cation afraid of?
A: A dogion.
by Jesus Rodriguez 1J
Sun Mar 04, 2018 6:41 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

What did the thermometer say to the graduated cylinder? "You may have graduated but I've got many degrees."
by Jesus Rodriguez 1J
Sun Mar 04, 2018 6:34 pm
Forum: General Rate Laws
Topic: 15.15
Replies: 2
Views: 116

15.15

Would the answer to this problem be considered to be a second order because it relies on both of the concentrations or would it be a first order because both concentrations are first order?
by Jesus Rodriguez 1J
Sat Feb 24, 2018 6:49 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Q: What element is a girl's future best friend?
A: Carbon.
by Jesus Rodriguez 1J
Sat Feb 24, 2018 8:37 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Strongly Reducing Metals
Replies: 5
Views: 184

Strongly Reducing Metals

How can we determine how strong of reducing agent metals are?
by Jesus Rodriguez 1J
Thu Feb 22, 2018 8:45 pm
Forum: Balancing Redox Reactions
Topic: Acidic and Basic Solution
Replies: 3
Views: 151

Acidic and Basic Solution

How do we know if the redox reaction is occuring in acidic or basic solution?
by Jesus Rodriguez 1J
Sun Feb 18, 2018 10:33 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Old Chemists Never Die, They Just Reach Equilibrium
by Jesus Rodriguez 1J
Sun Feb 18, 2018 10:30 am
Forum: Balancing Redox Reactions
Topic: Balancing Half Reactions
Replies: 2
Views: 113

Balancing Half Reactions

How do we know when to add H20 or H+ to the half reactions?
For example in 14.3 part a
They added 5H20 to the reactants and 10H+ to the products. I'm not sure where they got these numbers from.
by Jesus Rodriguez 1J
Sun Feb 18, 2018 7:46 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 11.111
Replies: 3
Views: 142

11.111

I was wondering if someone could explain to how they solved for DeltaG2, I understand the setup of the problem but I'm not sure how they got rid of e in one of the very last steps.
by Jesus Rodriguez 1J
Sun Feb 11, 2018 9:54 am
Forum: Administrative Questions and Class Announcements
Topic: Sunday Midterm Review Session Worksheet
Replies: 2
Views: 391

Sunday Midterm Review Session Worksheet

Hi can someone please link the worksheet that we are suppose to printout for today's review session, I can't find it.
by Jesus Rodriguez 1J
Sat Feb 10, 2018 3:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Since, Valentine's Day is coming up, here's a nice Chemistry Pick-Up Line

Are you made of copper and tellurium? Because you're CuTe.
by Jesus Rodriguez 1J
Sat Feb 10, 2018 3:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Why does hamburger yield lower energy than steak? Because it's in the ground state.
by Jesus Rodriguez 1J
Sat Feb 10, 2018 2:14 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Isothermal and Isovolumetric Calculations [ENDORSED]
Replies: 1
Views: 110

Isothermal and Isovolumetric Calculations [ENDORSED]

Can someone explain when we would need to calculate both isothermal and isovolumetric calculations and add the two? like what should the question be stating in order for us to know that we would need to combine these two processes.
by Jesus Rodriguez 1J
Sun Feb 04, 2018 9:32 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

If you're not part of the solution, you're part of the precipitate!
by Jesus Rodriguez 1J
Sun Feb 04, 2018 9:29 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Old chemists never die, they just stop reacting.
by Jesus Rodriguez 1J
Mon Jan 29, 2018 3:28 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: A spontaneous reaction
Replies: 7
Views: 201

A spontaneous reaction

Could someone explain to me what a spontaneous reaction is and possibly use the picture that the professor drew last friday I believe (the picture was of something going up a hill, if I remember correctly)
by Jesus Rodriguez 1J
Sat Jan 27, 2018 2:55 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Chapter 9, Question 7
Replies: 2
Views: 129

Chapter 9, Question 7

Can someone explain to me why we had to multiply the gas constant by 5/2 and 3/2?
by Jesus Rodriguez 1J
Sat Jan 27, 2018 2:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Q: Did you hear about the man who got cooled to absolute zero?

A: He's 0K now
by Jesus Rodriguez 1J
Sat Jan 27, 2018 2:49 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: exothermic vs endothermic [ENDORSED]
Replies: 7
Views: 322

Re: exothermic vs endothermic [ENDORSED]

In most part problems, the water is usually seen as the surrounding but it's like the person above said, it all depends on what the question is describing
by Jesus Rodriguez 1J
Sat Jan 27, 2018 2:32 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law [ENDORSED]
Replies: 7
Views: 278

Re: Hess's Law [ENDORSED]

For the most part, we are usually given anything that is needed to solve that problem whether directly or indirectly given to us.
by Jesus Rodriguez 1J
Sun Jan 21, 2018 8:31 am
Forum: Phase Changes & Related Calculations
Topic: Calculating the Initial Temperature Of An Object
Replies: 3
Views: 240

Calculating the Initial Temperature Of An Object

A 248 g piece of copper is dropped into 390ml of water at 22.6C. The final temperature of the water is 39.9C. Can someone explain how we would calculate the initial temperature of the copper piece?
by Jesus Rodriguez 1J
Sun Jan 21, 2018 8:22 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: R Constant
Replies: 2
Views: 90

R Constant

Can someone explain when to use .08206 value vs the 8.314 value
by Jesus Rodriguez 1J
Sat Jan 20, 2018 7:05 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.65
Replies: 2
Views: 101

8.65

If the reaction we want is N2 + 5/2 O2 --> N205,
then why does the solution stop at 2NO + (3/2)O2 --> N205
I'm wondering about the unequal amount of oxygen
by Jesus Rodriguez 1J
Sat Jan 20, 2018 5:13 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.51 [ENDORSED]
Replies: 2
Views: 96

8.51 [ENDORSED]

Can someone explain to me how to find the enthalpies of formation for the products, the solutions manual shows -393.51kj/mol for CO2 but I'm unsure as to how they got that number
by Jesus Rodriguez 1J
Sun Jan 14, 2018 8:33 am
Forum: Phase Changes & Related Calculations
Topic: Steam Burning
Replies: 7
Views: 279

Re: Steam Burning

Steam burns more because it is undergoing a phase change as a result of reacting with your skin and the phase change from vapor to liquid causes heat to be released


I found this link to be helpful

http://scienceline.ucsb.edu/getkey.php?key=1322
by Jesus Rodriguez 1J
Sun Jan 14, 2018 8:23 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

I would never try to poison you...

Now eat your Pb and Jelly sandwich
by Jesus Rodriguez 1J
Sun Jan 14, 2018 8:19 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907990

Re: Post All Chemistry Jokes Here

Don't tell jokes to noble gases

You'll get no reaction
by Jesus Rodriguez 1J
Sat Dec 09, 2017 10:19 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Endothermic v. Exothermic Reactions
Replies: 9
Views: 839

Re: Endothermic v. Exothermic Reactions

In an endothermic reaction the system absorbs energy(delta H>0), where as in exothermic reactions heat is released(delta H<0). If you click on this link http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml , it will take you several examples of each type of r...
by Jesus Rodriguez 1J
Sat Dec 09, 2017 10:11 am
Forum: Administrative Questions and Class Announcements
Topic: LaKretz Building [ENDORSED]
Replies: 2
Views: 249

LaKretz Building [ENDORSED]

Can someone tell me where the LaKretz Building is located so that I know where to go for the review sessions today and final tomorrow
by Jesus Rodriguez 1J
Sun Dec 03, 2017 10:35 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH and pOH
Replies: 10
Views: 405

Re: pH and pOH

pH represents the concentration of H+ while pOH is a measure of concentration of OH-. You would calculate the value by taking the -log of concentration of the substance.
by Jesus Rodriguez 1J
Sun Dec 03, 2017 10:28 am
Forum: Sigma & Pi Bonds
Topic: Sigma and pi
Replies: 12
Views: 599

Re: Sigma and pi

Yes, every first bond is a sigma bond and the rest of the bond that follow(like the 2nd bond in a double bond) are pi bonds.
by Jesus Rodriguez 1J
Sun Nov 26, 2017 6:17 pm
Forum: Hybridization
Topic: Pi Bonds vs. Sigma Bonds
Replies: 7
Views: 303

Re: Pi Bonds vs. Sigma Bonds

The first bonds are known as sigma bonds and the rest of the bonds are pi bonds. For example, when there is a triple bond, the first is a sigma bond and the 2nd and 3rd bonds are pi bonds.
by Jesus Rodriguez 1J
Sun Nov 26, 2017 6:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw molecular shape
Replies: 4
Views: 522

Seesaw molecular shape

I was wondering if anyone could explain how we know if a compound has the seesaw molecular shape
by Jesus Rodriguez 1J
Sun Nov 19, 2017 3:51 pm
Forum: Naming
Topic: Roman Numerals
Replies: 3
Views: 433

Re: Roman Numerals

There would not be negative roman numerals because you would only use the roman numerals to describe the different oxidation state of that transition metal.
by Jesus Rodriguez 1J
Sun Nov 19, 2017 3:40 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelates
Replies: 3
Views: 175

Re: Chelates

A chelate is a complex that contains one more ligands that form a ring of atoms with the central metal atom.
by Jesus Rodriguez 1J
Sun Nov 12, 2017 10:15 pm
Forum: DeBroglie Equation
Topic: De Broglie Equation [ENDORSED]
Replies: 4
Views: 324

Re: De Broglie Equation [ENDORSED]

No you would not use DeBroglie Equation to find the energy of a photon because the equation gives you the wavelength for particles of mass. To find the Energy of A photon you would the equation E=hv, you can derive v from the formula c = lambda * frequency (v)
by Jesus Rodriguez 1J
Sun Nov 12, 2017 10:10 pm
Forum: Empirical & Molecular Formulas
Topic: Practice Midterm Question
Replies: 4
Views: 270

Re: Practice Midterm Question

If you are given the percentages of each element. You can just use percentages as grams because the empirical formula is relative to the number of atoms. You would then divide the number of grams by the molar mass of each element to get moles. Then divide by lowest number of moles that you got and u...
by Jesus Rodriguez 1J
Sun Nov 05, 2017 5:03 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d and s blocks
Replies: 16
Views: 686

Re: d and s blocks

The d block is written before the s block because the d block is lower in energy. Since electron configurations are written based on increasing energy d would always come before s.
by Jesus Rodriguez 1J
Sun Nov 05, 2017 4:57 pm
Forum: Lewis Structures
Topic: Biradical vs Lone Pair
Replies: 3
Views: 149

Re: Biradical vs Lone Pair

Lone pair refers to valence e- that aren't shared with another atom. Biradical refers two unpaired electrons
by Jesus Rodriguez 1J
Sun Oct 29, 2017 5:56 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Quick Question about SO4
Replies: 8
Views: 682

Re: Quick Question about SO4

Calculating the formal charge of the each element and you add them up to determine how stable a molecule is.
by Jesus Rodriguez 1J
Sun Oct 29, 2017 5:17 pm
Forum: Significant Figures
Topic: 300 vs 300. [ENDORSED]
Replies: 8
Views: 519

Re: 300 vs 300. [ENDORSED]

Yes, 300. has 3 sig figs because of the decimal which makes the zeros significant. Whereas the zeros in 300 are just seen as placeholders.
by Jesus Rodriguez 1J
Sun Oct 22, 2017 12:53 pm
Forum: Properties of Light
Topic: Color of visible light
Replies: 11
Views: 540

Re: Color of visible light

No we would not be expected to know the specific color. You would however be expected to know the range of the spectrum of colors (red-700nm and 400nm)
by Jesus Rodriguez 1J
Sun Oct 22, 2017 12:46 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Angular Momentum Quantum Number [ENDORSED]
Replies: 3
Views: 215

Re: Angular Momentum Quantum Number [ENDORSED]

The angular momentum quantum number describes the shape the orbital where an electron is found. As for calculations. The L helps us calculate orbital angular momentum which is the rate that the electron moves around the nucleus. That formula is (l(l+1))^1/2*(h/2pi)
by Jesus Rodriguez 1J
Sun Oct 15, 2017 5:10 pm
Forum: Properties of Electrons
Topic: Energy Levels
Replies: 3
Views: 243

Energy Levels

I was wondering if it was possible for the energy levels to move down and if or how that would affect the Formula En= -hR/n^2
by Jesus Rodriguez 1J
Sun Oct 15, 2017 5:00 pm
Forum: Properties of Light
Topic: Photons
Replies: 7
Views: 311

Re: Photons

Photons are small particles of light that are said be massless and have both wavelike properties which is shown in the diffraction experiment and also contains particle properties which can seen in the photoelectric experiment.
by Jesus Rodriguez 1J
Sat Oct 07, 2017 8:50 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Calculations [ENDORSED]
Replies: 3
Views: 568

Re: Limiting Reactant Calculations [ENDORSED]

Your next step would be to convert the grams of reactant into moles. You would do this by dividing the grams given to you by the molar mass of the reactant. From then you would need to divided the number moles by the coefficient in front of the particular reactant. Then whichever reactant has the le...
by Jesus Rodriguez 1J
Sat Oct 07, 2017 8:33 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity unit [ENDORSED]
Replies: 11
Views: 752

Re: Molarity unit [ENDORSED]

The standard units for molarity are mol/L so I would suggest using those units. If a problem for some reason asks you for Molarity in terms of mol/ml you can always convert the Liters.

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