CHEMISTRY COMMUNITY

Alyssa_Wieand_2G

why do chemists like nitrates so much? Because they are much cheaper than day rates.

Alyssa_Wieand_2G

i also do not think the order matters as long as it is obvious where your drawing starts and ends

Alyssa_Wieand_2G

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!

Alyssa_Wieand_2G

I think our best bet is to wait for the other lecture to come out or contact the bruincast at bruincasthelp@ucla.edu

Alyssa_Wieand_2G

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!

Alyssa_Wieand_2G

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!

Alyssa_Wieand_2G

Hi, can someone please go more in depth on the differences between each kind of system and give some examples?

Alyssa_Wieand_2G

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...

Alyssa_Wieand_2G

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".

Alyssa_Wieand_2G

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...

Alyssa_Wieand_2G

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.

Alyssa_Wieand_2G

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.

Alyssa_Wieand_2G

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!

Alyssa_Wieand_2G

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.

Alyssa_Wieand_2G

It is usually the atom will the least ionization energy.

Alyssa_Wieand_2G

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?

Alyssa_Wieand_2G

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...

Alyssa_Wieand_2G

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.

Alyssa_Wieand_2G

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

CHEMISTRY COMMUNITY

Search found 19 matches

Re: Post All Chemistry Jokes Here

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

IUPAC Naming

Re: Bruincast Friday 2/24

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

Re: Quiz Solutions?

Open, Closed, and Isolated Systems

Re: Heat Capacities [ENDORSED]

Re: Post All Chemistry Jokes Here

Re: equilibrium constant

Re: coordination number [ENDORSED]

Re: Drawing MO Diagrams

Re: Electron Configuration for Fe 3+

Re: Electronegativity in Quiz 2 [ENDORSED]

Re: Central Atom

Excited vs. Ground State [ENDORSED]

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

Re: Quizes

Re: Speed of radiation