CHEMISTRY COMMUNITY

april_bussey_1C

Hi all,

This is a problem I had from a Peer Learning session. For the VSEPR formula I got Ax2E6 and I double checked to make sure all the bond and valence electrons added up.. which molecular geometric shape would this fall under? Help please and thanks

april_bussey_1C

When determining what kind of shape an element has how do we know which resonance structure is used?

april_bussey_1C

Double bonds usually go where they are needed to create the lowest formal charge possible.

april_bussey_1C

Exceptions to the octet rule fall into one of three categories: (1) an incomplete octet, (2) odd-electron molecules, and (3) an expanded octet.

april_bussey_1C

Can someone help explain to me the process of drawing out the lewis structure for a covalent bond? For example ammonium chloride (problem 3.39)

april_bussey_1C

okay so the octet rule fully applies when we are trying to stabalize an atom?

april_bussey_1C

okay, i'm starting to understand this more! So on the lewis structure for h20 there are 2 lone pair electrons outside of the oxygen atom and 4 electron pairs in total because of the two lone pairs + the 2 electrons that bond the hydrogen and oxygen together, right?

april_bussey_1C

In example 3.3, it is stated that H2o has 4 electron pairs and im having trouble understanding how. For the configurations of each element I got: (hydrogen) 1s1, (hydrogen) 1s1, and (oxygen) 2s2 2p4 and counted 2 electron pairs instead of 4. Can anyone help me out?

april_bussey_1C

Okay, sorry i'm getting used to the terms for this chapter. So, the lone pair electrons would be the electrons not shared with another atom (on the lewis structure it would be the dots on the outside of the element letters right)?

april_bussey_1C

What exactly does the octet rule mean? When forming ions does there have to be 8 electrons available after removing/adding an electron?

april_bussey_1C

When trying to figure out the formal charge of a bond, how do we know the amount of loan pair electrons?

april_bussey_1C

Hi all, I'm still having a hard time understanding how to know how many valence electrons a specific element has. Can anyone help me out?

april_bussey_1C

okay yay I actually understand now! Thank you guys!!!!

april_bussey_1C

2.19 (a) How many values of the quantum number l are possible when n 7? (b) How many values of ml are allowed for an electron in a 6d-subshell? (c) How many values of ml are allowed for an electron in a 3p-subshell? (d) How many subshells are there in the shell with n 4? Im not fully understandi...

april_bussey_1C

2.19 (a) How many values of the quantum number l are possible when n 7? (b) How many values of ml are allowed for an electron in a 6d-subshell? (c) How many values of ml are allowed for an electron in a 3p-subshell? (d) How many subshells are there in the shell with n 4? Im not fully understandi...

april_bussey_1C

2.17 How many orbitals are in subshells with l equal to (a) 0; (b) 2; (c) 1; (d) 3? I saw a previous response for this question and i'm not fully understanding the concept. i know that when l=0, m must equal 0.... but how do we know that when l=2 it'll have 5 orbitals?? can someone please help me un...

april_bussey_1C

okay. Thank you so much!!

april_bussey_1C

2.21 What are the principal and orbital angular momentum
quantum numbers for each of the following orbitals: (a) 6p;
(b) 3d; (c) 2p; (d) 5f?

I'm having a hard time understanding where to start with this problem. can anyone help me please?

april_bussey_1C

2.1 Which of the following increase when the electron in a hydrogen atom undergoes a transition from the 1s-orbital to a 2p-orbital? (a) Energy of the electron. (b) Value of n. (c) Value of l. (d) Radius of the atom. Can anyone please explain the difference between a 1s orbital and 2p orbital? Im st...

april_bussey_1C

Oh okay I understand now! Thank you!

april_bussey_1C

For example, on problem 1.33c I got an answer of wavelength 1.2 x 10^-8 meters.. how can I better identify which region on the EM spectrum this falls under (especially when the answer I get is in scientific notation?

april_bussey_1C

So in this problem there is a chart with various given info (energy, wavelength, frequency) and you find the missing pieces with what has been given. I was able to complete the chart but I'm having a hard time understanding which region on the electromagnetic spectrum certain photons are on given a ...

april_bussey_1C

Can someone please explain how the photoelectric effect best supports the idea that electromagnetic radiation has the properties of particles?

april_bussey_1C

Okay. First things first. Identify what has been GIVEN in the equation and what it is that we are looking for.... GIVEN: energy of the photon 140.511keV ... WHAT WE'RE LOOKING FOR: the wavelength of the y-rays= ? Next, in order to even use the given information (GIVEN: energy of the photon 140.511ke...

april_bussey_1C

To prepare a fertilizer solution, a fl orist dilutes 1.0 L of 0.20 m NH4NO3(aq) by adding 3.0 L of water. The fl orist then adds 100. mL of the diluted solution to each plant. How many moles of nitrogen atoms will each plant receive? Solve this exercise without using a calculator. I have no idea how...

april_bussey_1C

Can anyone help to give me just like a basic outline of the kinds of questions pertaining to solutions and molarity. I have such a hard time evaluating the questions. For example with mole problems I know their either going to be asking me to find the moles, find the grams, or find the mass comp., o...

april_bussey_1C

So in order to solve this problem, you have to first think about what it is that the question is asking you to find. The question is asking you to compare the molarity that indicates hard water (5.30 x 10 -3) with the given information. This means that you need to figure out the molarity with the gi...

april_bussey_1C

You need to prepare 510. g of an aqueous solution containing 5.45% KNO3 by mass. Describe how you would prepare the solution and what mass of each component you would use. In this question when they ask how would you prepare are they referring to the amount of L or ml used when using this mass of so...

april_bussey_1C

A chemist measured out 8.61 g of copper(II) chloride tetrahydrate, CuCl24H2O. (b) How many moles of Cl ions are present in the sample? (c) How many H2O molecules are present in the sample? (d) What fraction of the total mass of the sample was due to oxygen? I understand that to find the moles of Cl ...

april_bussey_1C

Atomic mass is measured via mass spectrometry. Molar mass is computed from the atomic weight. There are no units of measurement for atomic masses because these are relative masses meaning these are “unitless.” So the atomic mass is measured by calculating the mass of protons and neutrons. Whereas th...

CHEMISTRY COMMUNITY

Search found 30 matches

VSPER MODEL FOR IODINE TRICHLORIDE

VSPER MODEL

Re: Where to put double bonds? [ENDORSED]

Re: Octet Exception

COVALENT VS IONIC LEWIS STRUCTURES [ENDORSED]

Re: OCTET RULE [ENDORSED]

Re: EXAMPLE 3.3 Counting electron pairs

EXAMPLE 3.3 Counting electron pairs

Re: FORMAL CHARGE

OCTET RULE [ENDORSED]

FORMAL CHARGE

VALENCE ELECTRONS [ENDORSED]

Re: HELP hw problem 2.17 [ENDORSED]

HOMEWORK PROBLEM 2.19 [ENDORSED]

HOMEWORK PROBLEM 2.19

HELP hw problem 2.17 [ENDORSED]

Re: PROBLEM 2.21

PROBLEM 2.21

PROBLEM 2.1

Re: HOMEWORK PROBLME 1.9 [ENDORSED]

Re: HOMEWORK PROBLME 1.9 [ENDORSED]

HOMEWORK PROBLME 1.9 [ENDORSED]

problem 1.21)

Re: 1.23

Homework problem G13

STEPS to figuring out solutions/ molarity quesitons

Re: Review Question [ENDORSED]

Fundamentals problem G7

Help with homework problem section E

Re: Molar Mass