Search found 25 matches

by nick_pantoja_3G
Sun Mar 19, 2017 9:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 200
Views: 44258

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle,
Thank you for all the resources and knowledge that you have given us. You have not only been able to make chemistry interesting but also easy to understand!
Sincerely,
Nick Pantoja
by nick_pantoja_3G
Sat Mar 18, 2017 3:08 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: 3 different subsitutients for a newman projection
Replies: 1
Views: 284

3 different subsitutients for a newman projection

For a molecule that has 3 different subsitituients on the carbon that you are analyzing for the newsman projection, do you have tp draw the substituents in a specific order. Like would you have to look at the molecule structure.
by nick_pantoja_3G
Sat Mar 11, 2017 6:17 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: staggered and eclipsed conformations
Replies: 1
Views: 192

staggered and eclipsed conformations

do we only need to know eclipsed and staggered conformations for ethane and butane? if not, are the other conformations the same as those we learned for those two? thanks
by nick_pantoja_3G
Fri Mar 03, 2017 3:21 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Graphs of Gibbs Free Energy vs. Energy
Replies: 2
Views: 257

Re: Graphs of Gibbs Free Energy vs. Energy

I also believe if it is talking about activation energy then the reaction profile will be energy on the y-axis, while if they give you standard free energy of activation then the y axis would be gibbs free energy
by nick_pantoja_3G
Thu Feb 23, 2017 2:14 pm
Forum: *Electrophiles
Topic: electrophile vs neutrophile
Replies: 2
Views: 305

electrophile vs neutrophile

i know that electrophile (based on the root words) likes electrons, does that mean it is positive and wants a negative value, or that its negative and wants a positive value. thank you.
by nick_pantoja_3G
Thu Feb 16, 2017 3:13 pm
Forum: General Rate Laws
Topic: Order equations
Replies: 2
Views: 214

Order equations

What in a question tells you if a kinetic reaction is zero order, 1st order, or 2nd order?
by nick_pantoja_3G
Thu Feb 09, 2017 3:43 pm
Forum: Balancing Redox Reactions
Topic: Redox Memorization Tips
Replies: 4
Views: 451

Re: Redox Memorization Tips

To memorize what is getting oxidized and reduced.. follow the acronym LEO goes GER.
Loses
Electrons
Oxidized

Gains
Electrons
Reduction

This is important to get right because if you mix them up then the whole problem is incorrect.
by nick_pantoja_3G
Thu Feb 02, 2017 3:44 pm
Forum: Balancing Redox Reactions
Topic: reduction vs. oxidation
Replies: 3
Views: 320

reduction vs. oxidation

I have a general question on how to differentiate between what's being reduced and what is being oxidized. So within a chemical equation, how can you tell what the oxidizing number is from the equation and then determine if it is being reduced or oxidized?
by nick_pantoja_3G
Thu Jan 26, 2017 3:49 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Entropy moles
Replies: 2
Views: 310

Re: Entropy moles

THANK YOU SO MUCH! that solved the problem. that makes so much sense.
by nick_pantoja_3G
Thu Jan 26, 2017 3:48 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Entropy moles
Replies: 2
Views: 310

Entropy moles

In a particular problem on the homework, it gave the values of delta s subscript m, when trying to calculate gibbs free energy, (specifically the change in entropy within the equation) however the chemical equation had 2 moles of it so the solution divided the given delta s values by 2. why is that?
by nick_pantoja_3G
Fri Jan 13, 2017 5:39 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies vs standard enthalpies of formation
Replies: 1
Views: 115

Bond Enthalpies vs standard enthalpies of formation

What is the main clue on whether to use bond enthalpies vs standard enthalpies of formation in a problem to calculate the net enthalpy? I feel that both are similar and I'm not sure what to look for as in approaching the problem.
by nick_pantoja_3G
Wed Nov 30, 2016 2:31 pm
Forum: Identifying Acidic & Basic Salts
Topic: moles of [oh-]
Replies: 1
Views: 281

moles of [oh-]

in one homework assignment, it gave a compound Ba(OH)2 and then it said that the moles of OH was .033 moles however when using ice tables, it used .066. did it use .066 bc there were two things of it?
by nick_pantoja_3G
Sun Nov 20, 2016 2:00 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Acidity constants [ENDORSED]
Replies: 2
Views: 471

Re: Acidity constants [ENDORSED]

yes and so is the dissociation constant
by nick_pantoja_3G
Fri Nov 11, 2016 2:54 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Order of Filling and Removing Electrons in M.O. Diagrams
Replies: 1
Views: 166

Re: Order of Filling and Removing Electrons in M.O. Diagrams

When the z<8 and if the M.O. is heteronuclear, the order is placed as such: sigma, anti bonding sigma, pi bonds, sigma, pi anti bonds, and then sigma anti bonds for z>8: sigma, sigma antibond, sigma, pi, pi antibond, sigma. if there is a heteronuclear compound the one that is more electronegative is...
by nick_pantoja_3G
Fri Nov 11, 2016 2:46 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Equilibrium Constant vs Reaction Quotient [ENDORSED]
Replies: 4
Views: 780

Re: Equilibrium Constant vs Reaction Quotient [ENDORSED]

And with those Q and K values, you will be able to compare and see which side is favored.
by nick_pantoja_3G
Thu Nov 03, 2016 10:24 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: countingg unpaired electrons in M.O. theory
Replies: 1
Views: 253

countingg unpaired electrons in M.O. theory

In molecular theory, how do we count how many unpaired electrons there are? I'm kind of confused on the whole molecular theory as well. And as to why we use it.
by nick_pantoja_3G
Tue Oct 25, 2016 11:15 pm
Forum: Lewis Structures
Topic: Lewis Structure Octet Rule Exceptions
Replies: 4
Views: 478

Re: Lewis Structure Octet Rule Exceptions

P, S, Cl can have expanded 8e-. However, Typically Cl is not a central atom as it has a high ionization energy.
by nick_pantoja_3G
Fri Oct 21, 2016 10:29 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Placing elements in Lewis diagram
Replies: 1
Views: 196

Placing elements in Lewis diagram

In the chapter homework, I would draw the Lewis diagrams with the correct number of bonds. But the positioning of the atoms are different. For example, I would attach an O to the top of a C instead of the left side (as seen in the book); would MY answer still be correct, as long as they are symmetri...
by nick_pantoja_3G
Fri Oct 14, 2016 8:59 am
Forum: Hybridization
Topic: Memorization Tricks
Replies: 9
Views: 1387

Re: Memorization Tricks

Also someone had told me this cool memorization trick for SI units.
"Good Models Know How Dunkin Donuts Can Make U Not Petit
Giga, Mega, Kilo, Hecto, Deca, Deci, Centi, Milli, Micro (symbol looks like a “U”), Nano, Pico"
by nick_pantoja_3G
Fri Oct 14, 2016 12:35 am
Forum: Hybridization
Topic: Memorization Tricks
Replies: 9
Views: 1387

Re: Memorization Tricks

Flashcards are always a good way to memorize things.
by nick_pantoja_3G
Wed Oct 05, 2016 3:42 pm
Forum: SI Units, Unit Conversions
Topic: SI Units/conversions memorization [ENDORSED]
Replies: 4
Views: 835

SI Units/conversions memorization [ENDORSED]

Are there an easy ways to memorize the different conversions? I find it hard to remember the different conversions, like putting J in terms of Kg s and m. Etc.
by nick_pantoja_3G
Sun Oct 02, 2016 4:33 pm
Forum: Properties of Light
Topic: Ch. 1.15 hw help
Replies: 2
Views: 273

Ch. 1.15 hw help

The hw question is "In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the value of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line." According to the textbook, they say the rydb...
by nick_pantoja_3G
Fri Sep 30, 2016 12:06 pm
Forum: Student Social/Study Group
Topic: Rieber Hall 14A Study Group (Fall 2016)
Replies: 49
Views: 4100

Re: Rieber Hall 14A Study Group (Fall 2016)

Would love to join, even though I'm all the way up in Hitch.
by nick_pantoja_3G
Sun Sep 25, 2016 1:02 pm
Forum: SI Units, Unit Conversions
Topic: Including Units in a Problem
Replies: 3
Views: 387

Re: Including Units in a Problem

I think it is always a good idea to show units throughout the problem just for you to know what the unit of measurement is/ keep track what you need in the final answer. It's always better to be safe and just use them throughout the problem. In regards to if its required, I'm not entirely sure.

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