CHEMISTRY COMMUNITY

Drake_Everlove_1K

Does using common names (for substituents like isopropyl, for example) make a difference in the use of dashes?

Drake_Everlove_1K

But if O is bonded to two carbons on the same ring, as if it were replacing a C in a cyclopropane, is it still considered an ether?

Drake_Everlove_1K

The above poster is probably correct, but in lecture he said that log has to do with reactions where pH is a relevant value, as it is measured in terms of log.

Drake_Everlove_1K

What would the lewis structure of O3 be? Do the formal charges need to add up to the total charge?

Drake_Everlove_1K

This equation might be needed in order to find a given value that you need for a different equation, so you should probably be acquainted with it.

Drake_Everlove_1K

Perfect systems would theoretically be reversible, meaning the reactions occuring within them would occur extremely slowly and with the maximum amounts of energy and work being done or used up. Real systems don't necessarily work that way.

Drake_Everlove_1K

ln and log have to do with whether or not pH is being used (pH is measured in log) so it shouldn't be very necessary to use the log equation, but I don't think it gives a different answer.

Drake_Everlove_1K

Reaction enthalpy describes the total net change in enthalpy that occurs after the reactants change and form products. Standard formation enthalpies describe the enthalpy required to create a given molecule from its atoms

Drake_Everlove_1K

I would also love an answer to this.

Let me format the question appropriately:

3BaO + 2Al --> Al₂O₃ + 3Ba

Drake_Everlove_1K

Aren't insulated systems necessarily isolated? Unless the insulated system is open, but that wouldn't make sense, because then heat transfer could occur, correct?

Drake_Everlove_1K

One of our questions on the quiz seems to want us to use a pure solid. However, having been told not to use that in an question what do I do for this question? Question 8 on Fall 2014 prep says: Considering NH4HS(s) <--> NH3(g) + H2S(g) If Kp is 0.11 at 300K, calculate the equilibrium partial pressu...

Drake_Everlove_1K

One of our questions on the quiz seems to want us to do this. Question 8 on Fall 2014 prep says: Considering NH 4 HS (s) <--> NH 3 (g) + H 2 S (g) If K p is 0.11 at 300K, calculate the equilibrium partial pressure of NH 3 (g) starting from pure NH 4 HS (s) .

Drake_Everlove_1K

So I have encountered varied answers to this question and want something final.

Does the square pyramidal shape (Ax₅E) have bond angles of 90, 180, or LESS THAN 90 and 180?

Drake_Everlove_1K

Hi, So I was wondering; if I have a compound with a central atom like Phosphorous, which can accept an expanded octet, how do I determine if it is a Lewis acid or base? If P has, say, 4 single bonds and a lone pair, would it like to donate that lone pair, making it a Lewis base? If P has a formal ch...

Drake_Everlove_1K

In regards to why it's multiplied by 2. +-0.1 is only one arm of the indeterminancy factor. delta V refers to the both arms or sides of the indeterminancy so we must use 0.2 instead of 0.1 as velocity can either be =0.1 or -0.1. So do you mean that any value in the delta V must be multiplied by 2, ...

Drake_Everlove_1K

So, there are three different formulas I am aware of. There is the chemical/empirical formula, the ratio of atoms to eachother in a molecule (i.e. CH 4 O for methanol) The molecular formula , which represents the total number of atoms in a molecule, which happens to remain the same (CH 4 O) in metha...

Drake_Everlove_1K

Hi, So I am a bit perplexed by the following equation, which is apparently true in both instances: hv = threshold energy hv = threshold energy + 1/2mv^2 (1/2mv^2 = kinetic energy) In the first equation, the energy of what is being solved for? In the second equation, what energy is being solved for? ...

Drake_Everlove_1K

So, I'm still not sure I know exactly what quantum spin entails. Is the electron literally spinning on an axis? What is is spinning "up" and "down relative to? Does it affect its motion around the atom or other electrons, and why exactly is it significant if not? Why can electron spin...

Drake_Everlove_1K

I wanted to follow up on this question; I too am hung up on one of the pre/post-assessment questions. It does not seem to be explained in the video module. Here is the question: 8. During a summer camping weekend 4 moles of butane (C4H10) gas were used for cooking. Chose the right balanced equation ...

CHEMISTRY COMMUNITY

Search found 19 matches

Re: Naming [ENDORSED]

Re: Figuring out if it is an ether

Re: Winter 2013 Midterm #7: Which Nernst Equation to Use?

Re: Oxidation number of oxygen in O3

Re: Final

Re: max amount of work

Re: Work Equations

Re: Bond Enthalpies

Re: Question 8.55

Re: Examples of adiabatic systems

2014 Workbook Quiz Question 8

Re: Calculating K

Square Pyramidal

Lewis Acids and Bases

Re: Minimum Indeterminacy [ENDORSED]

Connectivity of Atoms from Formula

Threshold Energy Question

Re: Stern and Gerlach Experiment [ENDORSED]

Re: Calculating Net Moles