Search found 19 matches

by Alyssa_Wieand_2G
Sun Mar 19, 2017 9:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019596

Re: Post All Chemistry Jokes Here

why do chemists like nitrates so much? Because they are much cheaper than day rates.
by Alyssa_Wieand_2G
Sun Mar 12, 2017 7:04 pm
Forum: *Alkenes
Topic: Does order matter in Line structure? [ENDORSED]
Replies: 4
Views: 505

Re: Does order matter in Line structure? [ENDORSED]

i also do not think the order matters as long as it is obvious where your drawing starts and ends
by Alyssa_Wieand_2G
Sun Mar 05, 2017 8:51 pm
Forum: *Alkanes
Topic: IUPAC Naming
Replies: 1
Views: 285

IUPAC Naming

For the IUPAC naming, do we need to memorize all of the prefixes that depend on the number of carbons in the molecule as shown in Table 1.1 on page 5 in the Ochem book? Thanks!
by Alyssa_Wieand_2G
Sun Feb 26, 2017 12:26 pm
Forum: *Electrophiles
Topic: Bruincast Friday 2/24
Replies: 5
Views: 668

Re: Bruincast Friday 2/24

I think our best bet is to wait for the other lecture to come out or contact the bruincast at bruincasthelp@ucla.edu
by Alyssa_Wieand_2G
Sun Feb 19, 2017 11:34 pm
Forum: Second Order Reactions
Topic: Is there such a thing as a Third Order Reaction?
Replies: 5
Views: 807

Re: Is there such a thing as a Third Order Reaction?

I believe we will just have to know zero, first, and second order reactions but the quiz will cover only kinetics up to page 73 in the course reader if that helps!
by Alyssa_Wieand_2G
Fri Jan 27, 2017 9:31 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Quiz Solutions?
Replies: 1
Views: 214

Re: Quiz Solutions?

I do not believe there are answers for the quiz in the back of the course reader, but many of the prep quiz questions are discussed on chemistry community if that helps!
by Alyssa_Wieand_2G
Sun Jan 22, 2017 10:17 pm
Forum: Phase Changes & Related Calculations
Topic: Open, Closed, and Isolated Systems
Replies: 8
Views: 704

Open, Closed, and Isolated Systems

Hi, can someone please go more in depth on the differences between each kind of system and give some examples?
by Alyssa_Wieand_2G
Sun Jan 15, 2017 7:27 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacities [ENDORSED]
Replies: 3
Views: 408

Re: Heat Capacities [ENDORSED]

Specific heat capacity is the heat required to raise the temperature of 1g by 1 degree celsius and molar heat capacity is the heat required to raise the temperature of 1 mole by 1 degree celsius. The difference is that one is measured in J/mol and the other is J/g or kJ depending on what information...
by Alyssa_Wieand_2G
Sat Dec 03, 2016 12:36 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019596

Re: Post All Chemistry Jokes Here

A man and a woman are sitting at a bar. The man is wearing a shirt that says "Polar" and the woman is wearing a shirt that says "Non-Polar". The man gets up and suddenly says: "Sorry, I just don't think the chemistry is right".
by Alyssa_Wieand_2G
Fri Nov 25, 2016 12:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: equilibrium constant
Replies: 3
Views: 406

Re: equilibrium constant

I think we need to know the general way in which temperature affects equilibrium by first determining if the reaction is endothermic (heat added with reactants) or exothermic (heat added with products). If the reaction requires heat (endothermic), then heating will favor the forward direction/format...
by Alyssa_Wieand_2G
Fri Nov 18, 2016 12:17 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number [ENDORSED]
Replies: 3
Views: 473

Re: coordination number [ENDORSED]

Coordination number is the number of bonds the central atom has inside of the complex, or brackets. Be sure to take into account ligands that can have more than on bond such a (en) or oxalato when counting up the total number of bonds.
by Alyssa_Wieand_2G
Thu Nov 10, 2016 8:06 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Drawing MO Diagrams
Replies: 3
Views: 3237

Re: Drawing MO Diagrams

The more electronegative atom is slightly lower when drawing MO diagrams for a heteronuclear diatomic molecule. Additionally, if one of the atoms has a nuclear charge of 8 and higher (Z>8) then the sigma bonds are lower than the pi bonds.
by Alyssa_Wieand_2G
Thu Nov 03, 2016 6:00 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration for Fe 3+
Replies: 6
Views: 32720

Re: Electron Configuration for Fe 3+

When I work this out, I first write out the structure for the ground state configuration which would be [Ar] 3d^6 4s^2 and then I just take electrons out in the order that is written so Fe3+ would be [Ar]3d^5 since the 4s block has slightly lower energy and they are filled first. Hope this helps!
by Alyssa_Wieand_2G
Thu Oct 27, 2016 8:32 pm
Forum: Electronegativity
Topic: Electronegativity in Quiz 2 [ENDORSED]
Replies: 3
Views: 416

Re: Electronegativity in Quiz 2 [ENDORSED]

You just need to remember that as the difference in electronegativity increases, the ionic character increases. This usually occurs in the top right of the periodic table with F, Cl, and O being the most electronegative.
by Alyssa_Wieand_2G
Sun Oct 23, 2016 9:21 pm
Forum: Lewis Structures
Topic: Central Atom
Replies: 5
Views: 608

Re: Central Atom

It is usually the atom will the least ionization energy.
by Alyssa_Wieand_2G
Thu Oct 20, 2016 10:32 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Excited vs. Ground State [ENDORSED]
Replies: 1
Views: 296

Excited vs. Ground State [ENDORSED]

Hi, I just need a little bit more clarification on the difference between the electron configurations of an excited atom and a ground state atom similar to the problem 2.39 on the homework in the textbook. How can you discern between the two?
by Alyssa_Wieand_2G
Thu Oct 13, 2016 6:57 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical equations too slow... any advice? [ENDORSED]
Replies: 18
Views: 1542

Re: Balancing Chemical equations too slow... any advice? [ENDORSED]

I agree that balancing out the biggest number on the reactant side first is a good first step as some of the other elements tend to fall into place after that and match up. Additionally, I like to list all the elements on the side of my work in order to keep track of the ones I have or have not bala...
by Alyssa_Wieand_2G
Fri Oct 07, 2016 11:23 am
Forum: Administrative Questions and Class Announcements
Topic: Quizes
Replies: 21
Views: 1376

Re: Quizes

Hi, for the quizzes I believe we can only use a scientific, non-graphing calculator and they will be 40 minutes and completed in discussion if that answers your question. But, I do not know whether the quiz will be multiple choice or short answer.
by Alyssa_Wieand_2G
Wed Sep 28, 2016 10:38 pm
Forum: Properties of Light
Topic: Speed of radiation
Replies: 2
Views: 300

Re: Speed of radiation

Yes I believe so because light is also known as electromagnetic radiation and the speed of light, c, is a constant.

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