CHEMISTRY COMMUNITY

Jessie_Chen_2L

I think it can be both.

Jessie_Chen_2L

You would go with the one with more carbons, so you would use the chain as the base of the name and you would name the cycloalkane as a substituent. For example if we had a cyclobutane and a heptane chain attached, you would say cyclobutylheptane, since the heptane is the longer carbon chain.

Jessie_Chen_2L

Jessie_Chen_2L

According to the course reader, the pre-equilibrium approach is simpler, but less flexible. You also need the reaction before the rate limiting step is equilibrium. For the steady-state approach, the concentration of intermediate in the assumed to be constant.

Jessie_Chen_2L

It is actually a table of values that they have found by experimentation when one is the standard hydrogen electrode.

Jessie_Chen_2L

Jessie_Chen_2L

Yes, you would multiply the bond enthalpies by the number of moles so that you can find the total amount required to break and form all the bonds.

Jessie_Chen_2L

For part a, the molar heat capacity of a monatomic ideal gas at constant pressure, like Kr(g), is C P,m = (5/2)R. To calculate the heat that is released, we use q = nC P,m (T final -T initial ) to get -90.6J. We have all the information because we can convert the gas to the amount of moles of gas an...

Jessie_Chen_2L

The standard state just means what phase the substance is at 1atm and at 25 degrees Celsius. For example, the standard state of water under these conditions would be liquid. If it's not at 1atm, then it's not in its standard state, so you would find the reaction enthalpy.

Jessie_Chen_2L

"I don't trust atoms...they make up everything."

Jessie_Chen_2L

The Cl ion does not affect the pH of the solution at all so we can just ignore it. Only the NH₄ affects the pH because it can donate a proton to H₂O.

Jessie_Chen_2L

Hi, I am still sort of confused as to how we can tell if an acid or a base is strong or weak and why most inorganic acids are strong compared to organic acids. I know that strong acids lose a proton easily and the resulting anion must be stable, but I remember that we can somehow tell from K a and K...

Jessie_Chen_2L

A man walks into a bar. He says, "I'll have some H₂0."

The man next to him says, "I'll have some H₂0 too!", then drinks it and dies.

Jessie_Chen_2L

For all atoms with an atomic number less than 8 (so anything before oxygen), the pi orbital is more stable because it has less energy than the sigma orbitals for 2p, so they fill up first. For all atoms with an atomic number greater than or equal to 8, the sigma orbital fills up before the pi orbital.

Jessie_Chen_2L

The molecular orbital diagram for B 2 is http://img.sparknotes.com/figures/8/83ce1fb7be648ede5785ea60c96b495c/b2correlate.gif You can see that there are two electrons in the σ 2s and two electrons in the σ* 2s and two in the π 2p orbitals. We now know that there are two electrons in the antibonding ...

Jessie_Chen_2L

All of the single bonds are sigma bonds and for the double bond, one of the bonds is a pi bond.

For a single bond, there is a sigma bond.
For a double bond, there is a sigma bond and a pi bond.
For a triple bond, there is a sigma bond and two pi bonds.

Jessie_Chen_2L

Electron affinity is the amount of energy released when an electron is added to a gas-phase atom. A positive electron affinity means that energy is released when an electron is added. A negative electron affinity means that energy must be supplied for an atom to gain an electron.

Jessie_Chen_2L

I'm a female.
Fe = Female
Male = Man
Therefore, I am Iron Man.

Jessie_Chen_2L

We know that the frequency $\nu$ is 99.5 MHz, so you would be able to find the wavelength by using the equation $c = \lambda x \nu$ .

Substitute in the speed of light for c and your frequency above (remember to convert to Hz) (1 MHz = 10^6 Hz) to find the wavelength.

Jessie_Chen_2L

Hi, from what I know, the threshold value is the minimum amount of energy it requires to remove an electron from the metal. It is also called the work function. And yes, the wavelength must be shorter to increase the frequency, which in turn increases the energy so that there is enough energy to rem...

CHEMISTRY COMMUNITY

Search found 20 matches

Re: Naming

Re: Naming Cycloalkenes

Re: Post All Chemistry Jokes Here

Re: Rate law of rxn mechanisms

Re: Equation to find standard reduction potentials?

Re: Post All Chemistry Jokes Here

Re: Bond Enthalpies

Re: 8.31 HW problem

Re: Different enthalpy of vaporizations for water

Re: Post All Chemistry Jokes Here

Re: Homework Help 12.69

Indicators of strong or weak acid/base

Re: Post All Chemistry Jokes Here

Re: HW Problem 4.59.A

Re: Bond order of B2 molecule

Re: sigma/pi bonds [ENDORSED]

Re: Electron Affinity [ENDORSED]

Re: Post All Chemistry Jokes Here

Re: Calculating Wavelength

Re: Increasing Intensity in Photoelectric Effect [ENDORSED]