CHEMISTRY COMMUNITY

Sophia Xu 3F

when we are asked to "draw the structure" of some molecule, are we drawing the line structure or a structure that shows the atoms?

Sophia Xu 3F

and do we just neglect the 1 in PROPANE because ALDEHYDE group has to be at the end of the chain?

Sophia Xu 3F

When we are doing naming for functional groups, do we treat the functional groups as substituents? like in the course reader, PROP-AN-AL C3H6 is just propanal, not 1-propanal because we neglect the 1 like we do in substituent namings? for the molecule right below it, which has a KEYTONE attached to ...

Sophia Xu 3F

Does the quiz cover functional group material?

Sophia Xu 3F

So is an intermediate has to be gone by the end of the reaction steps? Aka intermediate will never be part of the products?

Sophia Xu 3F

More complicated molecules tend to have more entropy

Sophia Xu 3F

Yes, if it's undergoing oxidation, it's the reducing agent, and vice versa.

Sophia Xu 3F

For the equation that change in S= nRln(V1/V2), why can we just replace V with P for the equation? Aka what does "P is the inverse of V" exactly mean?
Thanks!

Sophia Xu 3F

when steam hits your hand, the gas is going through a phase change from gas to water (on your hand). This phase change releases energy.
but when the boiling water hits your hand, there's no phase change.
thus steam burn is much worse than water burn.
hope that helps!

Sophia Xu 3F

think of it this way:
when steam hits your hand, the gas is going through a phase change from gas to water (on your hand). This phase change releases energy.
but when the boiling water hits your hand, there's no phase change.
thus steam burn is much worse than water burn.
hope that helps!

Sophia Xu 3F

I don't know if this would be helpful:
Exo is to release heat, the object cools down bc the heat is released;
Endo is to absorb heat, the object heats up bc heat is getting into the object.

Sophia Xu 3F

Its name is written as "potassium hexafluorocobaltate(III)", my question is why is the cobalt here has the "ate"?
Is it because the complex here is an anion?

Sophia Xu 3F

The side which has more moles of gas will shift to the side with fewer moles

Sophia Xu 3F

Charge is outside the bracket

Sophia Xu 3F

For example, for [Co(NH3)4(NO2)Cl]Cl, it says the name for it is tetra-ammine-chloro-nitro-cobalt(III)-chloride.
My question is why is chloro before nitro in the name? Or does it matter at all? The order of chloro and nitro regarding to their positions in the formula?
Thanks!

Sophia Xu 3F

The number of bonds an atom has to form with other atoms + region of unpaired electrons.
Hope that helps!

Sophia Xu 3F

Z is the nuclear charge of an atom. So O is Z=8.
Hope that helps!

Sophia Xu 3F

Hi,
The sigma bond should be Csp2-Csp2, not Csp3-Csp3. Each 3 has 3 regions of e- density so there are 3 hybrid orbitals for each C. They also each has an unhybridized p orbital that forms a pi bond with each other.
Hope this helps!

Sophia Xu 3F

Hi,
When u take off electrons, go in the order of np, ns, (n-1)d. Hope this helps!

Sophia Xu 3F

Valence electrons are the electrons in the outest shell.

Sophia Xu 3F

Hi!
When light passes through some absorbing material like vapor to the spectrum, the radiation absorbed by certain frequencies will be shown on the spectrum as the absorption lines.
And yes the lines are those paired with wavelengths on the spectrum.

CHEMISTRY COMMUNITY

Search found 21 matches

Re: Quiz 3 Winter 2016

Re: functional groups as substituents in naming?

functional groups as substituents in naming?

Re: Quiz 3 Winter 2016

Intermediate

Re: Determining Entropy

Re: Clarification on Oxidizing and Reduction Agents

P is the inverse of V?

Re: Steam Burns

Re: Steam Burns vs. Water Burns

Re: Exothermic vs. Endothermic

K3[CoF6]

Re: Increasing/Decreasing Pressure

Re: Quiz 3 Prep: #2

Naming order

Re: How to Determine Electron Density

Re: MO theory, how do we know Z?

Re: Sigma and Pi bond question

Re: ground state electron configurations

Re: Valence Electrons

Re: Absorption Line Homework 1.11