CHEMISTRY COMMUNITY

Anjum Farook 2O

thank you for the time you've invested in ensuring we have access to countless resources that have helped us prepare for this class!

Anjum Farook 2O

nope, i don't think so

Anjum Farook 2O

i know we haven't covered hydrogenation yet but

Anjum Farook 2O

sulphur is the least electronegative

Anjum Farook 2O

I believe you use dashes not just to separate numbers but also prefixes/suffixes. e.g. 3-ethyl-5-methyl-octane

Anjum Farook 2O

I was wondering the same thing ^ (sig figs in #6)

Anjum Farook 2O

When using the expression delta S = Cp ln (T2/T1), does it matter if we use Kelvin or Celsius for the values of T2 and T1?

Anjum Farook 2O

It said the same thing for me (plugin not working). Try downloading it by clicking on the "Part 1.mp4" file - do the same for all 3 files. I downloaded it and can watch it now

Anjum Farook 2O

i think it depends on the specific phase changes/chemical changes you're comparing..

Anjum Farook 2O

quizzes aren't curved but final grades are

Anjum Farook 2O

What do you do with a sick chemist?

First you try and helium, then try and curium, but it that doesn’t work, you barium

Anjum Farook 2O

Would anyone be interested in cross-checking answers in that case?

Anjum Farook 2O

I wasn't sure about how to solve #31 from chapter 8 so I checked out the solutions manual and realized we needed the molar heat capacity for the gas. Are we expected to know the molar heat capacity values for atoms/linear/non-linear molecules? Also, how does molar heat capacity at constant pressure ...

Anjum Farook 2O

Did you hear about the man who got cooled to absolute zero?
He's 0K now.

Anjum Farook 2O

I didn't understand how to answer this part of the question either. "11.7: The following flasks show the dissociation of a diatomic molecule, X2, over time. (a) Which flask represents the point in time at which the reaction has reached equilibrium? (b) What percentage of the X2 molecules have d...

Anjum Farook 2O

hi! this helped me sort of gauge when we can/can't approximate and why:

https://www.khanacademy.org/science/che ... r-small-kc

Anjum Farook 2O

he said we don't need to know how to draw the structure in class

Anjum Farook 2O

i think we just write (en). I believe it was written like that somewhere in the textbook

Anjum Farook 2O

the metal atom bonds to the three nitrogens in dien as they have lone pairs

it would probably be octahedral

Anjum Farook 2O

Also, for alphabetical order - do we consider the chemical symbols or the actual/written names of the ligands?

Anjum Farook 2O

When writing down the formula of a coordination compound, do we consider whether a ligand is neutral/anionic as well as the alphabetical order or is only the alphabetical order taken into consideration? I read somewhere that you write neutral ligands first, followed by anionic ones.

Anjum Farook 2O

a general reaction is written in the form R --> P where R is the reactant and P is the product formed. When we say a reaction tends to the left, we mean it favors the formation of reactants (since reactants are on the left side of the equation). Similarly when we say a reaction tends to the right, w...

Anjum Farook 2O

Did you hear about the man who got cooled to absolute zero? He's 0K now.

Anjum Farook 2O

The structure with the three double bonded Os has a FC of 0 on each of the three oxygens and a formal charge of -1 on the fourth oxygen. This is where the molecule gets its overall charge from. In the structure you're suggesting, however, chlorine carries the -1 charge, which is less favorable/desir...

Anjum Farook 2O

It basically wants you to identify/recognize that the structure of XeO2F2 is an exception to the octet rule because Xe expands its octet/has more than eight electrons in it's valence shell in this structure. Neon, on the other hand, is a member of period 2, so even if it were to be a central atom, i...

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