CHEMISTRY COMMUNITY

Brian Huynh 3D

When you have a substituent on cyclohexane, is it typically located at the top/ bottom of the chair? What happens if you have multiple-2 or 3 substituents?

Brian Huynh 3D

Can carboxylic acids have the carboxl group at either ends or does it have to exist on the most right end of the structure?

Brian Huynh 3D

Does the collision for nucleophiles and electrophiles only happen at pi bonds?

Brian Huynh 3D

How is question one done from quiz 2?

Brian Huynh 3D

Is it possible for a reaction to have an order greater than 2?

Brian Huynh 3D

The double bars indicate a salt bride. What indicates a porous disk in a cell diagram?

Brian Huynh 3D

Will we need a calculator for this test?

Brian Huynh 3D

For the table of values for Standard Potential E, are they all reduction values and can they be used for any reaction that doesn't involve hydrogen?

Brian Huynh 3D

In class, Friday 1/20/17, we covered that $\Delta S= q/T$ , is this formula used to find positional or thermal entropy?

Brian Huynh 3D

Professor Lavelle covered in class that the Enthalpy of formation of O₂ is 0. Are there any other exceptions like this?

Brian Huynh 3D

Typically, when doing these problems, you want to look at the molecular formula and see if it is a base or an acid when in water. NH4Br will dissociate into NH₃ and H+ ion(or hydronium), thus NH4 is an acid because it donated an electron and the solution is acidic due to the increase of H+ ion.

Brian Huynh 3D

Is there a convention when writing down the molecular formula from a name? I've seen several examples that show different trends to naming a structure. For example, in pentaaminechloronickel(II) chloride, the amine comes before the Cl,Ni(NH 3 ) 5 Cl) Cl 2 but in pentaaminebromocobalt, the amine come...

Brian Huynh 3D

The equation states that there is only one bromide- bromo, so you can only assume that there is one negative charge. Then, you look at the charge of cobalt and subtract the charge to get the positive 2 charge of the ion. If it stated pentaaminetribromocobalt(III), then the structure would be neutral...

Brian Huynh 3D

When drawing MO diagrams, does the Z>8 and Z<8, count the number of total atoms in a molecule(CO= 11) or just a the highest atom in the molecule ( O = 6)?

Brian Huynh 3D

Will we be responsible for knowing the bond angles for VESPR models?

Brian Huynh 3D

One factor that can help determine iconic character is the difference in electronegativity between two atoms. The greater the difference in electronegativity, the greater the charge difference and greater ionic character of the covalent bond. Typically a electronegative charge difference of > 2 indi...

Brian Huynh 3D

What does it mean when energy dissipates? Is that the energy left over or the threshold energy? And how does one get the final answer when trying to determine energy emitted given that a molecule emits 675 nm light and dissapates an X amount of energy per photon.

Brian Huynh 3D

How come the energy state is higher at 3d10 than 4s when Z(atomic number) < 20?

Brian Huynh 3D

Is it possible to get the workbook without having to buy a course reader?

Brian Huynh 3D

Technically, Planck's Constant has 6 significant figures ( 6.62608 x 10^-34), but it depends on the experimental data you have. Typically, most workbook problems don't have that long of significant figures, so they are usually limited by the other numbers like frequency or wavelength. Numbers with l...

CHEMISTRY COMMUNITY

Search found 20 matches

Substituents on Cyclohexane

Carboxylic Acids

Collision

Re: Quiz 2 Winter 2017

Reaction order

Cell diagram

Re: Quiz 1 Preparation Answers

Standard Potential E

Positional Entropy or Thermal Entropy?

Bond Enthalpy and Enthalpy of Formation

Re: Homework Help 12.65

Convention for naming

Re: Quiz 3 preparation - Fall 2015

Using MO Model

Re: Midterm

Re: Ionic Characters

Quiz 1 Question 5

Energy Levels of Electrons

Question about the Workbook

Re: Constants and Significant Figures