CHEMISTRY COMMUNITY

MeghetyManoyan1A

Which element is the coldest?
Brrryllium

MeghetyManoyan1A

How can you tell which/how many atoms in a structure lie in the same plane?

MeghetyManoyan1A

What is it called when the Queen of England farts?
A noble gas

MeghetyManoyan1A

What did the bartender say when oxygen, hydrogen, sulfur, sodium, and phosphorus walking into the bar?
OH SNaP!

MeghetyManoyan1A

Hybridization is when atomic orbitals interfere with each other/combine and form new orbitals, specifically 4 orbitals of equal energy. For example, for sp^3 orbitals, the energy level lies above that of s and below p. The bonds that hybrid orbitals form are stronger than those formed with unhybridi...

MeghetyManoyan1A

I must be an exothermic reaction, because I'm running out of energy.

MeghetyManoyan1A

Carbon and a hydrogen went on a date. They really bonded.

MeghetyManoyan1A

Yes, it refers to the most plausible resonance structure, which has the lowest formal charge/is the most stable.

MeghetyManoyan1A

What do dipoles say in passing?
"Do you have a moment?"

MeghetyManoyan1A

As bond order increases, so does strength. So, a triple bond is stronger than a double bond, and a double bond is stronger than a single bond. The one that is stronger is usually shorter, ie a double bond is shorter than a single bond. Also, if there are lone pairs, it can weaken a bond.

MeghetyManoyan1A

Yes, there can be a resonance structure for this, as you can vary the placement/rotate the bonds.

MeghetyManoyan1A

What show do cesium and iodine love watching together?
CSI

MeghetyManoyan1A

A photon checks into a hotel and is asked if he needs any help with his luggage.
He says, "No, I'm traveling light"

MeghetyManoyan1A

The noble gases walk into a bar. No one reacts.

MeghetyManoyan1A

The p subshell has 3 possible orientations, where one of the three orbitals can exist. They describe the axes where the lobes of the orbital lies. So, Px lies on the x-axis, Py lies on the y-axis, and Pz lies on the z axis.

MeghetyManoyan1A

Cations are ions that have lost an electron/electrons. Since they have less electrons, the nucleus is able to pull them in more tightly. On the other hand, anions gain electrons. Having more electrons will cause more repulsion, leading to a larger size, relative to its parent atom.

MeghetyManoyan1A

There's the trend of electronegativity. As you move from left to right, electronegativity increases, and as you move from top to bottom, electronegativity decreases, with some exceptions.

MeghetyManoyan1A

What do you call a clown who's in jail?

A silicon.

MeghetyManoyan1A

Because you are given the percentages, and they add up to a 100%, you can just use the numbers as they are. However, if you had the numbers expressed in grams, then you would have to find the percent mass composition of each element, and then, assume there is 100g of the sample. This just means that...

MeghetyManoyan1A

This is false because electrons that have l=2 are in the d-orbital, so its angular momentum is larger than that of l=1, which is the p-orbital. This means that the electron doesn't get as close to the nucleus in the d-orbital, having less shielding than the p-orbital. Zeff is the effective nuclear c...

MeghetyManoyan1A

What kind of fish is made out of 2 sodium atoms?
2Na

MeghetyManoyan1A

What's wrong with a joke involving Cobalt, Radon, and Ytterium?
it's CoRnY

MeghetyManoyan1A

For #33 part c, which asks " What is the wavelength of the radiation that caused photoejection of the electron," do we use the given threshold energy to find the wavelength? Or do we need to find E=hv using the photoelectric effect equation, then find the wavelength?
Thanks!

MeghetyManoyan1A

Why does a hamburger have less energy than steak?

Because it's in the ground state!

MeghetyManoyan1A

I think we should know that generally, wavelengths of 400nm-700nm are visible light/belong to the Balmer series, as there were some homework questions like that. However, I don't think we need to memorize the wavelengths corresponding to each color of light, or other details like that. Also, we shou...

MeghetyManoyan1A

When you convert nm to meters, you get 2.5x10^-9 meters. Using the formula, you need to divide c (the speed of light), which is 3.0x10^8 m/s, by the wavelength, which you found to be 2.5x10^-9 meters. This should give you 1.2x10^17 Hz as the frequency.

MeghetyManoyan1A

Yes, you can also use the formula M=n/V if you are given the number of moles of a solute and the volume of the solvent, to find the molarity/concentration of a solution.

MeghetyManoyan1A

You have to multiply by the relative ratio. For example, if the ratio was 3:4, you would multiply the moles of the reactant by (4/3) to find the amount of the product that can be produced. If it asks for the amount of product produced, in grams, you wold just convert it from moles to grams using the...

MeghetyManoyan1A

In the formula, M1V1=M2V2, M1 and V1 represent the initial molarity and initial volume, respectively, while M2 and V2 represent the final molarity and volume of a solution.
g/mol is the unit for molar mass.
M is the molarity, in mol/L

MeghetyManoyan1A

For question M11 from the textbook, it states that a second reaction will occur "if enough oxygen is present." Because of this statement, can we assume that oxygen is the limiting reactant of the second reaction? Or would we need to show calculations to prove this?

MeghetyManoyan1A

For problem G.23, "In medicine it is sometimes necessary to prepare solutions with a specific concentration of a given ion. A lab technician has made up a 100.0-mL solution containing 0.50 g of NaCl and 0.30 g of KCl, as well as glucose and other sugars. What is the concentration of chloride io...

CHEMISTRY COMMUNITY

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Atoms in a Plane

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HW 1.33 (Part C) [ENDORSED]

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Re: Test 2 and Wavelengths/ Frequencies Table

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Re: What To Do When Mole Ratios Are Present? [ENDORSED]

Re: Variables

M11 HW

G.23 from HW [ENDORSED]