Search found 13 matches

by Felipe Rubio1H
Tue Mar 14, 2017 4:33 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Intro to O-CHEM CH.1 Problem #29
Replies: 1
Views: 317

Intro to O-CHEM CH.1 Problem #29

This problem states to draw the structure of (Z)-3-methyl-3-heptene. I drew a structure that shows resemblance to the answer key, but it wasn't exactly the same. For these types of problems, it is okay if our structure doesn't look exactly the same as the answer key, just as long as we have the righ...
by Felipe Rubio1H
Tue Mar 14, 2017 4:29 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Intro to O-CHEM CH.1 Problem #28
Replies: 1
Views: 237

Intro to O-CHEM CH.1 Problem #28

For number 1.28 in the Intro to O-CHEM textbook, I correctly wrote down the name of the alkene, but the only thing I missed was the "(trans)-" part of the name. Why is it (trans)? I would think it would be (cis) instead since the two methyl groups are on the same side, and there's only one...
by Felipe Rubio1H
Sun Mar 12, 2017 9:06 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Delta G (knot)=-RTlnKeq on Page 108 in CR [ENDORSED]
Replies: 1
Views: 252

Delta G (knot)=-RTlnKeq on Page 108 in CR [ENDORSED]

I am not sure if this is really important, but where did -2.3030 come from in the Delta G (knot)=-2.3030RTlnKeq? I just need some clarification.
by Felipe Rubio1H
Sun Mar 05, 2017 4:20 pm
Forum: *Alkanes
Topic: Naming Organic Molecules
Replies: 5
Views: 462

Naming Organic Molecules

I am just a little confused about naming parent chains. In the "Introduction to Organic Chemistry" textbook on page 6, there is a molecule called 3-Ethylheptane. I just need to clarify, so a parent chain is just the longest continuous chain you can make with carbons, even if it is branched...
by Felipe Rubio1H
Sun Feb 26, 2017 10:28 pm
Forum: *Electrophilic Addition
Topic: Example on Page 82 in CR
Replies: 1
Views: 212

Example on Page 82 in CR

On the last example on page 82 in the CR, I am aware of what is going on except I am confused on what happens to the Br with the negative charge after the Br+ has bonded with the electron rich region of the carbon double bond?
by Felipe Rubio1H
Sun Feb 05, 2017 8:59 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode/Cathode
Replies: 4
Views: 405

Anode/Cathode

When analyzing an electron flow, I'm still confused in terms of the salt bridge. I know that it it to allow a counter ion to flow, but what does that mean for the anode and cathode? What is the effect of having a salt bridge?
by Felipe Rubio1H
Sun Jan 15, 2017 11:01 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy: State Properties
Replies: 2
Views: 281

Enthalpy: State Properties

If a problem does not say that heat is either released or absorbed, or if it does not have the "delta H" symbol then does that imply that it can be added or cannot be solved with either method?
by Felipe Rubio1H
Sun Jul 17, 2016 9:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape and Central Atom (HW 4.13) [ENDORSED]
Replies: 3
Views: 364

Molecular Shape and Central Atom (HW 4.13) [ENDORSED]

I just want clarification, but when writing out a Lewis structure, what are the exceptions to the octet role and why? As in which elements are able to have more than 8 valence electrons, because I am getting a few wrong because I misplace extra electrons in areas they are not supposed to, since i am...
by Felipe Rubio1H
Sun Jul 17, 2016 9:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW 4.21 Page 141
Replies: 3
Views: 311

HW 4.21 Page 141

Question 4.21 asks to write out the Lewis structure and give the approximate bond angles of the given compounds, but my question is do you have to write the lewis structure, then determine the molecular shape, and then give its bond angle from the molecular shape, or can you jump from the lewis stru...
by Felipe Rubio1H
Sun Jul 10, 2016 9:55 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Full Ground-State Electron Configuration? [ENDORSED]
Replies: 2
Views: 393

Re: Full Ground-State Electron Configuration? [ENDORSED]

Yes, the 3d^6 goes before the 4s^2 because 4s^2 is at a higher energy level than 3d^6, and that trend continues: 3d^6 4s^2, 4d^7 5s^2 etc.
by Felipe Rubio1H
Sun Jul 10, 2016 9:49 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin Magnetic Quantum Number [ENDORSED]
Replies: 1
Views: 350

Spin Magnetic Quantum Number [ENDORSED]

I am well aware on how to find quantum numbers, but I am just a little confused about the last quantum number which determines the magnetic spin? Why is magnetic spin important and how does it affect atoms? And how do we solve for it, or is it always given?
by Felipe Rubio1H
Sun Jul 10, 2016 9:32 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty Principle
Replies: 2
Views: 324

Uncertainty Principle

I am a little confused about delta x, if a problem gave me the delta x such as "80+/-.5m", why do we only use the "+/-.5" when working out the problem, is the "80" irrelevant to working out the solution? What does that number represent?
by Felipe Rubio1H
Sun Jul 10, 2016 8:59 pm
Forum: Einstein Equation
Topic: H.W. 1.45
Replies: 1
Views: 355

H.W. 1.45

I am confused on this question because I thought with uncertainty principle related problems, anytime a "+/-" symbol appears in front of a number you double it since that represents the total window of uncertainty. But in in question 1.45, the book does not double the "+/-5.0 m.s^-1&q...

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