Search found 30 matches

by MedhaVallurupalli1F
Sun Jul 28, 2019 10:20 am
Forum: Sigma & Pi Bonds
Topic: Sigma/pi bonds
Replies: 3
Views: 380

Sigma/pi bonds

Which bond allows for rotation around the molecule, sigma or pi?
by MedhaVallurupalli1F
Sun Jul 28, 2019 10:18 am
Forum: Bond Lengths & Energies
Topic: Strength of bonds
Replies: 1
Views: 219

Strength of bonds

Which is more important in determining strength of bonds, # of ve- or size of the atoms involved?
by MedhaVallurupalli1F
Sun Jul 28, 2019 10:15 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: EDTA
Replies: 1
Views: 221

EDTA

What is the importance/relevance of edta and why is it special?
by MedhaVallurupalli1F
Sun Jul 28, 2019 10:12 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Final Material
Replies: 2
Views: 262

Final Material

Are we required to know both geometry and molecular shape of a molecule?
by MedhaVallurupalli1F
Sun Jul 28, 2019 10:09 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Geometry vs molecular shape
Replies: 6
Views: 452

Geometry vs molecular shape

What is the difference between geometry vs molecular shape?
by MedhaVallurupalli1F
Fri Jul 26, 2019 2:14 pm
Forum: General Science Questions
Topic: Final Material
Replies: 3
Views: 581

Final Material

Are electron configurations going to be tested on the final exam?
by MedhaVallurupalli1F
Sun Jul 21, 2019 4:10 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing Power [ENDORSED]
Replies: 8
Views: 764

Re: Polarizing Power [ENDORSED]

Simply, something that has a high polarizing power, has a greater ability to pull the electron density of another atom/molecule towards it.
by MedhaVallurupalli1F
Sun Jul 21, 2019 4:08 pm
Forum: Hybridization
Topic: Pi and Sigma Bonds
Replies: 17
Views: 535

Pi and Sigma Bonds

If there is a double bond or a triple bond, how many of the bonds would be pi and how many would be sigma?
by MedhaVallurupalli1F
Sun Jul 21, 2019 4:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 3
Views: 175

Re: Bond Angles

I think Professor Lavelle mentioned that we would need to know the "ideal bond angles" (ex. 180, 90, 109.5, etc.) but not the more specific ones that would be given.
by MedhaVallurupalli1F
Sun Jul 21, 2019 4:04 pm
Forum: Ionic & Covalent Bonds
Topic: Inter and Intra
Replies: 8
Views: 1186

Re: Inter and Intra

Inter refers to bonds between multiple atoms/molecules. Intra refers to bonds within a certain molecule.
by MedhaVallurupalli1F
Sun Jul 21, 2019 4:02 pm
Forum: Hybridization
Topic: Determining how many electron densities
Replies: 5
Views: 294

Determining how many electron densities

Do lone pairs count toward the number of electron densities? Or is it just the number of bonds? For example, if a F atom has three bonds and a lone pair, would it be three or four regions of e- density?
by MedhaVallurupalli1F
Sun Jul 21, 2019 4:01 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar v. Nonpolar
Replies: 11
Views: 1498

Polar v. Nonpolar

How do you figure out if a molecule is polar/nonpolar and how do dipoles relate to this?
by MedhaVallurupalli1F
Sat Jul 13, 2019 10:57 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Which do you prioritize first
Replies: 10
Views: 665

Which do you prioritize first

Which do you prioritize first, formal charge or specific number of valence electrons per atom, when drawing structures?
by MedhaVallurupalli1F
Sat Jul 13, 2019 10:55 pm
Forum: Lewis Structures
Topic: Drawing lewis structures
Replies: 5
Views: 428

Drawing lewis structures

How do you draw lewis structures when there are positive and negative molecules? I remember we had to put the negative parts as far away from each other as possible, but are there any specific rules for these?
by MedhaVallurupalli1F
Sat Jul 13, 2019 10:52 pm
Forum: Ionic & Covalent Bonds
Topic: Cutoff Values
Replies: 1
Views: 310

Cutoff Values

When comparing EN of different atoms, what is the cutoff difference value for ionic vs covalent bonds?
by MedhaVallurupalli1F
Sat Jul 13, 2019 10:49 pm
Forum: Octet Exceptions
Topic: Expanded octet
Replies: 3
Views: 434

Re: Expanded octet

Elements in periods greater than period 3 on the periodic table have a d orbital available for electrons to occupy. Atoms in these periods can follow the octet rule, but in some cases they can expand their valence shells to accommodate more than eight electrons. This is possible because for n=3, the...
by MedhaVallurupalli1F
Wed Jul 10, 2019 12:17 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground State vs. Excited State
Replies: 2
Views: 343

Ground State vs. Excited State

How can you tell which is ground/excited?
by MedhaVallurupalli1F
Mon Jul 08, 2019 11:58 pm
Forum: Properties of Light
Topic: VIdeo Module: Photoelectric effect question
Replies: 2
Views: 343

VIdeo Module: Photoelectric effect question

28. Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1.
Answer the following three questions.
A. What is the kinetic energy of the ejected electron?

How do we find this?
by MedhaVallurupalli1F
Sun Jul 07, 2019 9:57 pm
Forum: Quantum Numbers and The H-Atom
Topic: Homework 2.21
Replies: 1
Views: 273

Homework 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?


What's the difference (principal v. orbital) and how do you find them?
by MedhaVallurupalli1F
Sun Jul 07, 2019 9:55 pm
Forum: Quantum Numbers and The H-Atom
Topic: Predicting values based on quantum numbers
Replies: 1
Views: 296

Predicting values based on quantum numbers

(a) How many values of the quantum number l are possible when n is 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 is 4? How do you figure these out...
by MedhaVallurupalli1F
Sun Jul 07, 2019 9:44 pm
Forum: Quantum Numbers and The H-Atom
Topic: Numbers
Replies: 2
Views: 350

Numbers

What are all of the quantum numbers and what do they represent in terms of the configuration of the electron and/or the properties of that electron?
by MedhaVallurupalli1F
Sun Jul 07, 2019 9:43 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Subshells
Replies: 2
Views: 318

Subshells

What is the difference between sub shells and just shells in terms of electron configuration?
by MedhaVallurupalli1F
Sun Jul 07, 2019 9:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Homework 2.13
Replies: 1
Views: 251

Homework 2.13

Describe the orientation of the lobes of the px-, py-, and pz-orbitals with respect to the reference Cartesian axes.

Can someone explain how to do this problem?
by MedhaVallurupalli1F
Sun Jul 07, 2019 9:40 pm
Forum: Properties of Light
Topic: Homework 2.1
Replies: 1
Views: 298

Homework 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. What is "l"? I understand the others (a, b, and d) but I'm having a hard time...
by MedhaVallurupalli1F
Wed Jun 26, 2019 1:32 pm
Forum: Balancing Chemical Reactions
Topic: Combustion Equation
Replies: 21
Views: 1283

Re: Combustion Equation

Combustion reactions always result in Carbon Dioxide and Water.
by MedhaVallurupalli1F
Wed Jun 26, 2019 1:31 pm
Forum: Significant Figures
Topic: Determining sig figs
Replies: 10
Views: 952

Determining sig figs

Is there a difference in sig figs for 100g of something versus 100.g of something? How can you tell which numbers are significant?
by MedhaVallurupalli1F
Wed Jun 26, 2019 12:53 am
Forum: Limiting Reactant Calculations
Topic: How do you approach question M1 in 6th edition book?
Replies: 2
Views: 347

How do you approach question M1 in 6th edition book?

Screen Shot 2019-06-26 at 12.53.23 AM.png



I know we have to go through the limiting reactant steps, but how do you do this if you are not given the mass of the second reactant?
by MedhaVallurupalli1F
Tue Jun 25, 2019 9:19 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity and Dilutions Module: Question #25
Replies: 1
Views: 308

Molarity and Dilutions Module: Question #25

Can someone walk me through this problem? 25. 5.00 g of KMnO4 is dissolved in a 150.00 mL flask of water. If 20.00 mL of this solution is removed and placed in a new 2nd 250.00 mL flask and filled with water, what is the concentration of the solution in the 2nd flask? Molar Masses: K (39.10 g/mol), ...
by MedhaVallurupalli1F
Mon Jun 24, 2019 6:04 pm
Forum: Limiting Reactant Calculations
Topic: Lim Reactant Module: question 20 [ENDORSED]
Replies: 2
Views: 403

Lim Reactant Module: question 20 [ENDORSED]

20. How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is: CaCO3(s) + H2SO4(aq) ---> CaSO4(s) + CO2(g) + H2O(l) A. 5 moles CO2 B. 7 moles CO2 C. 10 moles CO2 D. 13 moles CO2 Can someone walk me thro...

Go to advanced search