CHEMISTRY COMMUNITY

904611851

Since the moles of gas goes from 3 to 2, doesn't the entropy decrease?

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Yes, it is possible for a cyclic structure to have another cyclic structure as a substituent. An example of this is cyclopentylcyclodecane, whose line structure looks like this: http://chemwiki.ucdavis.edu/@api/deki/files/1885/=drawing4.gif?revision=1&size=bestfit&width=155&height=84"onc...

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Are you referring to the number we put in front of the substituent? If you are, you always want the number to be as low as possible. So, if numbering from the right of the molecule gives the number 5 for the substituent while numbering from the left gives the number 3 for the substituent, you should...

904611851

In the textbook problems, it already states which reactions are fast and which reactions are slow. The quiz will most likely give that information as well!

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As you mentioned, there are two ways to approach this calculation. The two ways are: 1. We can add together the cell potential of the oxidation half-reaction and the cell potential of the reduction half-reaction. Since the cell potentials given to us on the cheat sheets are always in the form of a r...

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The workbook is supposed to be turned in before every quiz we take (with the practice test filled in), so it's unlikely that you'll find a cheaper one that hasn't been written in already. I'm not sure if you can buy the workbook without the course reader, but they're sold at Course Reader Material (...

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When the temperature is constant (isothermal process)

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Heat is the transfer of energy, while enthalpy is basically a measure of how much energy a system contains. ΔH is the change in that amount of energy. ΔH is equal to heat (q) when either the volume or the pressure is constant.

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The dictionary definition for a piston is, "A solid cylinder or disk that fits snugly into a hollow cylinder and moves back and forth under the pressure of a fluid, as in many engines, or moves or compresses a fluid, as in a pump or compressor."

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The first response on this website explained it really well for me: http://socratic.org/questions/what-is-the-difference-between-entropy-and-enthalpy"onclick="window.open(this.href);return false; Conceptually: "Enthralled- H, is the sum of internal energy of a system and the product of the pres...

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This video goes over the conceptual and mathematical aspects of the photoelectric effect.
Thank you for watching!
(Made by Justine Aziz (1J), Marla Dimetrios (1K), and Marina Habib (1K)

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From what I've been told by TA's, we should never truncate the value until the very end.

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For most anionic ligands, we can get the name by taking the element (in this case bromine), removing the end of the word, and attaching "-ido" (bromido). In order to find the oxidation number of cobalt, we have to figure out the oxidation number of the rest of the compound: - NH3 has no ch...

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I believe Dr. Lavelle mentioned that it will only make up for the participation points we missed

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If you draw out the structure of the formula that is given and see that a ring has been formed with the ligand in it, then there is a chelating ligand.

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For the equation:
2HCl(g) + I(s) --> 2HI(g) + Cl2(g)

why does the number of moles of HCl increase when the volume in the container decreases?

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I am not sure what you mean by "H's and Br's" canceling out since Br is not in the molecule. But, the lewis structure for H2SiO has a trigonal planar shape with Si as the central atom. In order for a molecule with the trigonal planar shape to be non polar, all three of the surrounding elem...

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How do we determine if the lone pairs in a molecule cancel out to make the entire molecule non polar?

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For every orbital (s,p,d,f), there is an l value. So, in your example, 3d corresponds to l = 2. As stated in the course reader, ml=-l,...,l. So, if l = 2, ml = -2, -1, 0, 1, 2.
s --> l = 0
p --> l = 1
d --> l = 2
f --> l = 3
I hope this answers your question! :)

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In this problem, we are not solving for the uncertainty. What we are given is the uncertainty position of the electron (somewhere within the atom's diameter). We use the uncertainty to find the lowest velocity possible for this range of position. So, the velocity that the course reader gives as an a...

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Search found 20 matches

Re: Predicting the sign of S Without Math

Re: Ring Substituents

Re: Drawing Structures

Re: Determining slow v fast reaction?

Re: Calculating Cell Potential

Re: Workbook

Re: Internal energy

Re: Q vs. Enthalpy?

Re: Pistons

Re: Enthalpy and Entropy

Video- The Photoelectric Effect

Re: Sig figs

Re: Naming Coordination Compounds?

Re: Chemistry Videos

Re: Chelating Ligands

Decrease in volume

Re: H2SiO

Polarity

Re: Quantum Numbers

Re: Course reader- Which is the uncertainty for the electron