Search found 36 matches

by Marco_Romo_1M
Mon Mar 13, 2017 2:46 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Rotation of cycloalkanes
Replies: 2
Views: 781

Re: Rotation of cycloalkanes

Looking at the 3-D model of cyclopropane, there is no conformation that could result in the 3 carbon molecules to not be in the same plane. For cyclobutane, two of the carbons can go up or down together, creating a non planar formation (butterfly) which is more stable because there is less torsional...
by Marco_Romo_1M
Thu Mar 09, 2017 5:07 pm
Forum: *Alkenes
Topic: Priority in Alkenes
Replies: 2
Views: 398

Priority in Alkenes

What determines which molecule on the sp2 hybridized carbon of alkenes on either side gets priority? For example, why is 1.26 trans?
by Marco_Romo_1M
Thu Mar 09, 2017 4:26 pm
Forum: *Cycloalkenes
Topic: 1.21 a b and c
Replies: 3
Views: 883

1.21 a b and c

Are we supposed to know how to do these problems? If so, what does diene mean?
by Marco_Romo_1M
Thu Mar 09, 2017 4:20 pm
Forum: *Cycloalkanes
Topic: "iso" naming
Replies: 4
Views: 1326

Re: "iso" naming

For question 1.16 in the organic chemistry textbook, why is the answer 2-isopropyl-1,1-dimethylcyclopentane and not 1,1-dimethyl-2-isopropylcyclopentane? Following the alphabetical ordering rule
by Marco_Romo_1M
Thu Mar 09, 2017 4:15 pm
Forum: *Cycloalkanes
Topic: "iso" naming
Replies: 4
Views: 1326

"iso" naming

When do you put "iso" in front of the name? And does it received alphabetical priority or is it ignored?
by Marco_Romo_1M
Tue Mar 07, 2017 8:23 pm
Forum: *Alkanes
Topic: 1.13 (a)
Replies: 1
Views: 341

Re: 1.13 (a)

Never mind I read the answer key in an incorrect order
by Marco_Romo_1M
Tue Mar 07, 2017 8:21 pm
Forum: *Alkanes
Topic: 1.13 (a)
Replies: 1
Views: 341

1.13 (a)

What is an acyclic hydrocarbon. And why does the line structure for 2,3-dimethyloctane look different than a typical alkane.
by Marco_Romo_1M
Wed Mar 01, 2017 10:19 pm
Forum: *Alkanes
Topic: Quiz 3
Replies: 2
Views: 478

Quiz 3

Will quiz 3 include the material at the end of the reaction rate chapter (Arrhenius equation)? Or just organic chem and kinetics.
by Marco_Romo_1M
Mon Feb 20, 2017 10:50 pm
Forum: General Rate Laws
Topic: 15.19 Homework
Replies: 1
Views: 297

15.19 Homework

Why are the units for the answer of part c different in the textbook versus the solutions manual?(mol vs mmol). And what is the correct answer.
by Marco_Romo_1M
Mon Feb 13, 2017 10:24 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm 2014 #6
Replies: 1
Views: 343

Midterm 2014 #6

Why does the final answer have 6 sig figs?
by Marco_Romo_1M
Fri Feb 10, 2017 4:11 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Question 14.85 Reducing Metal [ENDORSED]
Replies: 1
Views: 295

Question 14.85 Reducing Metal [ENDORSED]

Is the "strength of the reducing metal" the same as "the strength of the reducing agent"(Q 14.25)?
by Marco_Romo_1M
Thu Feb 09, 2017 12:20 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Strongly reducing metal
Replies: 3
Views: 687

Re: Strongly reducing metal

Why is this different from listing the strengths of reducing agents? when you look at the E^0 of the cell. Thanks
by Marco_Romo_1M
Wed Feb 08, 2017 11:44 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 1
Views: 389

Nernst Equation

Where does the 0.025 and 693V in the solutions manual come from?
by Marco_Romo_1M
Mon Feb 06, 2017 7:18 pm
Forum: Balancing Redox Reactions
Topic: 14.17
Replies: 2
Views: 388

Re: 14.17

Where do you get all that information from by just looking at the question that lists two compounds?
by Marco_Romo_1M
Mon Feb 06, 2017 3:07 pm
Forum: Balancing Redox Reactions
Topic: Basic vs. Acidic Redox Reactions
Replies: 1
Views: 427

Basic vs. Acidic Redox Reactions

Should we know how to solve a redox reaction in both an acidic and basic solution and be able to identify the reducing/oxidizing agents?
by Marco_Romo_1M
Thu Feb 02, 2017 7:40 pm
Forum: Balancing Redox Reactions
Topic: EMF vs. Standard Reduction Potentials
Replies: 1
Views: 279

EMF vs. Standard Reduction Potentials

What's the difference between the EMF(E) and the standard reduction potentials (E not)?
by Marco_Romo_1M
Mon Jan 30, 2017 6:43 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.57 (b) Help asap and I'll love you
Replies: 5
Views: 652

Re: 9.57 (b) Help asap and I'll love you

I see. In 55, it talks about the formation reaction H2(g) +1/2O2(g)--->H2O(g). Delta Hf and delta Hr are equal because the enthalpy of formation (deltaHf) for O2 and H2 are zero. So Hr is just the Hf of the H2O (g). Hope this helps
by Marco_Romo_1M
Mon Jan 30, 2017 6:01 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.57 (b) Help asap and I'll love you
Replies: 5
Views: 652

Re: 9.57 (b) Help asap and I'll love you

I'm not sure that I'm following but you don't need to know the delta H_f or delta H_r for entropy. That's for enthalpy. Look as delta S values in the appendix instead. Hope this helps
by Marco_Romo_1M
Mon Jan 30, 2017 5:46 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: HW Prob. 11.17
Replies: 1
Views: 354

HW Prob. 11.17

I got delta G of the reaction as -2.7 kJ/mol and the book says -27 kJ/mol. Is this a typo?
by Marco_Romo_1M
Wed Jan 25, 2017 9:36 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: chapter 9 question 23
Replies: 2
Views: 349

Re: chapter 9 question 23

"If SO2F2 adopts a positionally disordered arrangement in its crystal form, what might its residual molar entropy be?". This is question 9.25.
by Marco_Romo_1M
Wed Jan 25, 2017 9:17 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Homework 9.23
Replies: 1
Views: 296

Homework 9.23

Why does COF2 have a higher molar entropy at T=0?
by Marco_Romo_1M
Tue Jan 17, 2017 11:37 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Question 8.31
Replies: 4
Views: 496

Question 8.31

Are we supposed to know that the molar heat capacity of a monatomic ideal gas at constant pressure is 5/2 R? And at constant volume is 3/2 R? Where do these numbers come from?
by Marco_Romo_1M
Thu Jan 12, 2017 3:10 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW Questions #57
Replies: 1
Views: 231

HW Questions #57

What does the c subscript after the standard reaction enthalpy stand for?
by Marco_Romo_1M
Mon Nov 28, 2016 6:18 pm
Forum: Lewis Acids & Bases
Topic: Question 12.49
Replies: 1
Views: 403

Question 12.49

How can we tell which base is stronger between hypobromite (BrO-) and morphine (C17H19O3N)? Would we just have to rely on the experimentally obtained pKb values?
by Marco_Romo_1M
Mon Nov 21, 2016 10:08 pm
Forum: Bronsted Acids & Bases
Topic: Question 12.9b
Replies: 1
Views: 382

Re: Question 12.9b

NH4I is the same as NH4+ and I-. Therefore, the NH4+ is the acid because it donates a proton to I- to form HI and I- is a base because it accepts the proton from NH4+. In the process, NH4+ becomes NH3 (ammonia). Hope this helps.
by Marco_Romo_1M
Mon Nov 14, 2016 9:21 pm
Forum: Ideal Gases
Topic: Quiz 3 Content [ENDORSED]
Replies: 1
Views: 433

Quiz 3 Content [ENDORSED]

Do we need to know Le Chatelier's Principle for quiz 3? I know Dr. Lavelle said we only need to know the first four pages of equilibrium but in the practice quiz that we are turning in to be graded there are problems concerning Le Chatelier's Principle.
by Marco_Romo_1M
Wed Nov 09, 2016 2:26 pm
Forum: Naming
Topic: Drawing Coordination complexes
Replies: 1
Views: 349

Drawing Coordination complexes

How would you draw a structure with two dien groups attached to the center metal? And what would be the overall geometry?
by Marco_Romo_1M
Wed Nov 09, 2016 2:20 pm
Forum: Naming
Topic: Charge on Compounds
Replies: 2
Views: 456

Re: Charge on Compounds

You can find the most stable Lewis Structure for the molecule and then compute the formal charges of each atom. For molecules like H2O and NH3 they are neutral all around. Hope this helps!
by Marco_Romo_1M
Thu Nov 03, 2016 12:07 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: How to Fill Out a Molecular Orbital Energy Level Diagram
Replies: 2
Views: 932

Re: How to Fill Out a Molecular Orbital Energy Level Diagram

You fill in the molecular orbitals from lowest energy to highest energy. Since s orbitals have lower energy than p orbitals, they are filled first. Also, anti-bonding orbitals (denoted with a *) have higher energies than bonding orbitals so they are above bonding orbitals. For atoms who's atomic num...
by Marco_Romo_1M
Wed Oct 26, 2016 2:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Diagram
Replies: 3
Views: 663

Re: VSEPR Diagram

Sigma bonds go hand in hand with single bonds because a sigma bond occurs when two orbitals overlap head to head. Therefore, there is only one area of electron concentration between atoms which constitutes a single bond.
by Marco_Romo_1M
Wed Oct 19, 2016 5:18 pm
Forum: Resonance Structures
Topic: Delocalization of Electrons [ENDORSED]
Replies: 1
Views: 347

Re: Delocalization of Electrons [ENDORSED]

Yes. If an electron can be delocalized, then there exists at least one resonance structure. For example, benzene has three double bonds and six carbon atoms. These three double bonds are delocalized because they can exist in another form with the same energy.
by Marco_Romo_1M
Tue Oct 11, 2016 10:30 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Quiz 1 prep #5 question [ENDORSED]
Replies: 7
Views: 1130

Re: Quiz 1 prep #5 question [ENDORSED]

Yes that is correct. So delta P is 4.02 X 0.2.
by Marco_Romo_1M
Thu Oct 06, 2016 5:23 pm
Forum: *Black Body Radiation
Topic: Testable Black-Body Information [ENDORSED]
Replies: 1
Views: 499

Testable Black-Body Information [ENDORSED]

As far as black-body radiation is concerned, are we only responsible for knowing that it can absorb and emit all frequencies? Or should we also be able to use the different equations regarding black body radiation?

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