Search found 33 matches

Tue Jul 30, 2019 11:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angles
Replies: 2
Views: 222

Angles

If for the triganol angles are 90,120,180 does that mean that see saws would also be <120 <90 and <180 ?
Mon Jul 29, 2019 7:35 pm
Forum: Naming
Topic: Practice Final naming coordinations
Replies: 1
Views: 265

Practice Final naming coordinations

On today’s practice final question 8 on the naming I was confused on how to find pt’s oxidation state. I know there is an equation, but for example in part A anime is neutral and cl is a -1x2 -2 and the cl is a -1 charge so then how does that come out to be +4 for pt?
Mon Jul 29, 2019 12:02 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: PH Equations [ENDORSED]
Replies: 1
Views: 303

PH Equations[ENDORSED]

I’m still confused how to do the equations for the acids and bases. I wanted to ask how do you know which ones go on the bottom and which ones go on the top?
Sun Jul 28, 2019 12:23 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Hybridized increases or decreases
Replies: 3
Views: 278

Hybridized increases or decreases

Can someone answer what having a a bond angle of an sp3 hybridized atom is 109.5 and that of an sp2 hybridized atom of 120 will the hybrid orbitals increase or decrease? How do we know when they increase or decrease?
Sun Jul 28, 2019 12:14 am
Forum: Lewis Acids & Bases
Topic: How to differentiate
Replies: 1
Views: 243

How to differentiate

How do you differentiate between bronsted acids, bases and conjugate acid and base?
Sun Jul 28, 2019 12:13 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular shape
Replies: 3
Views: 348

Molecular shape

When we write the molecular shape of the element how do we know when to add the solid shaded in triangle and the sgiwgal to ? and the regular bonding lines to?
Sun Jul 28, 2019 12:09 am
Forum: Determining Molecular Shape (VSEPR)
Topic: question 4.19
Replies: 2
Views: 285

question 4.19

What is the lewis structure of (CH3)2 Be? I did it as linear, but in the solution manual it it says it would be a tetrahedral, why is this?
Wed Jul 24, 2019 6:13 pm
Forum: Conjugate Acids & Bases
Topic: J.15 6th Edition
Replies: 1
Views: 322

J.15 6th Edition

I’m stuck on how to find the chemical equation for the proton transfer reaction of this cation or anion with water: (a) NaC6H5O; (b) KClO; (c) C5H5NHCl; (d) NH4Br. Can someone please explain how to do find a chemical equation exactly maybe even just part a ? Do we always add H2O to it ? As a reactan...
Tue Jul 23, 2019 6:48 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Homework for week 5 [ENDORSED]
Replies: 1
Views: 284

Homework for week 5[ENDORSED]

I wanted to ask if we are allowed to do homework for molecular shape and coordination or if we are just able to do acids and bases?
Sun Jul 21, 2019 9:36 pm
Forum: Ionic & Covalent Bonds
Topic: Polarizing Power [ENDORSED]
Replies: 2
Views: 375

Polarizing Power[ENDORSED]

If the cations Mg^+2 and Fe^3+ why would the Mg^+2 be greater?
Wed Jul 17, 2019 10:11 pm
Forum: Ionic & Covalent Bonds
Topic: CX and CN bonds [ENDORSED]
Replies: 2
Views: 500

CX and CN bonds[ENDORSED]

Can someone explain what CX and CN bonds are please and how to identify the strongest bond.
Wed Jul 17, 2019 5:51 pm
Forum: Lewis Structures
Topic: 3.57 6th edition part B
Replies: 1
Views: 366

3.57 6th edition part B

Initially I had gotten the hydrogen bonded to the Sulfur, but on the solution manual it says that the Hydrogen is bonded to one of the oxygens. Why is this? How can we know hot approach this?
Tue Jul 16, 2019 10:12 pm
Forum: Ionic & Covalent Bonds
Topic: Inter and Intra
Replies: 8
Views: 1189

Inter and Intra

What is the difference between inter and intra molecular forces?
Tue Jul 16, 2019 10:10 pm
Forum: Ionic & Covalent Bonds
Topic: Dipoles
Replies: 7
Views: 649

Dipoles

Are Dipoles polar? Can they be Dipoles and also have a hydrogen bond?
Tue Jul 16, 2019 10:09 pm
Forum: Ionic & Covalent Bonds
Topic: Intermolecular farces
Replies: 2
Views: 395

Intermolecular farces

Can someone please explain what would be the intermolecular forces of O=C=O and N=N. Can O=C=O be a a dipole? Or can it not because it has both oxygens on each of the sides? Would N=N just be non polar?
Fri Jul 12, 2019 7:35 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 6
Views: 475

Re: Formal Charge

It is most favorable because formal charge is the charge assigned to an atom in a molecule, assuming that electrons in al chemical bonds are shared equally between atoms, regardless of relative electronegativity.
Fri Jul 12, 2019 7:32 pm
Forum: Ionic & Covalent Bonds
Topic: Ground State
Replies: 13
Views: 825

Re: Ground State

This would be right only because cu+ is an exception so instead of it being what you first assumed the 1 from the s would travel over to the d which would make it d^10 because of cu+ being an exception.
Fri Jul 12, 2019 7:30 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration for 1st row transition metals
Replies: 6
Views: 613

Re: Electron Configuration for 1st row transition metals

The only cases are just Cu and Cr because in these cases, a completely full or half full d sub-level is more stable than a partially filled d sub- level, so an electron from the 4s orbital is excited and rises to a 3d orbital.
Fri Jul 12, 2019 7:22 pm
Forum: Ionic & Covalent Bonds
Topic: Friday's Lecture July 12, 2019
Replies: 2
Views: 310

Friday's Lecture July 12, 2019

Today in lecture Dr. Lavelle began talking about how B completed the octet of trifluoride, but I do not understand when trifluoride will want B to complete it and when not? If it even wants it to complete it under certain conditions? Can someone explain please, thank you. :)
Tue Jul 09, 2019 10:09 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: ION WITH +1
Replies: 4
Views: 362

ION WITH +1

If a problem gives you a configuration and asks you to find the ion but it does not say whether or not it is an exception ion do you automatically assume is not and look for it normally?
Tue Jul 09, 2019 8:14 pm
Forum: Molarity, Solutions, Dilutions
Topic: Test 1 number 7
Replies: 4
Views: 2370

Test 1 number 7

Can someone please explain what equation they used for test 1 number seven and why? if you have to convert?
Sat Jul 06, 2019 9:45 pm
Forum: Properties of Light
Topic: Class lecture
Replies: 2
Views: 325

Class lecture

Do we only use the equation E=Ef - Ei for a hydrogen atom? and why?
Sat Jul 06, 2019 9:41 pm
Forum: Einstein Equation
Topic: 1.13 sixth edition
Replies: 1
Views: 284

1.13 sixth edition

For this question I don't understand how to use the R.What would you multiply it to? would v= the R?
Sat Jul 06, 2019 9:19 pm
Forum: Einstein Equation
Topic: 1.25 6TH Edition
Replies: 1
Views: 526

1.25 6TH Edition

For this problem after you do all the steps and get E=5.00 X 10^-3 / 22.99 mol Na why do you just directly multiply it times the 3.37 x 10^19 and 6.022 X 10^23 and not have to do another conversion to do it from grams to moles?
Sat Jul 06, 2019 7:01 pm
Forum: Photoelectric Effect
Topic: Photo electric effect
Replies: 7
Views: 565

Photo electric effect

Why does there need to be a vacuum in the photo electric effect and what does it necessarily mean? Is it because the electrons get too excited ?
Sat Jul 06, 2019 6:56 pm
Forum: Photoelectric Effect
Topic: Photo electric diagram
Replies: 1
Views: 274

Photo electric diagram

Can there be another substance other than medal that can eject from from the diagram?
Thu Jul 04, 2019 4:59 pm
Forum: Properties of Light
Topic: 1A.7 Seventh edition
Replies: 1
Views: 243

1A.7 Seventh edition

For this question it it states to find the frequency of violent light when it is 7.1x10^14 Hz it asks for the wavelength. I know that you would put the 7.1x10^14 Hz on the bottom, but I do not know what to put on. the top and why.
Sat Jun 29, 2019 3:03 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Equations
Replies: 5
Views: 723

Balancing Equations

Can someone explain how you fin out what the net number of moles are? Like after balancing out the equations how do you find the net? Is it 4 because thats the number in front of C4H10? 17. During a summer camping weekend 4 moles of butane (C4H10) gas were used for cooking. Chose the right balanced ...
Sat Jun 29, 2019 2:29 pm
Forum: Balancing Chemical Reactions
Topic: Why do we balance chemical equations?
Replies: 13
Views: 1341

Re: Why do we balance chemical equations?

This would be to show the conservation of mass a chemical equation must have an equal number of each type of atoms on both sides of the reaction arrow.
Sat Jun 29, 2019 2:20 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 43
Views: 4717

Re: E=hv

I don't think electrons can be removed from anymore I think there is more like a specific way in which it can be removed only. Maybe when it is jumping off the metal only?
Sat Jun 29, 2019 2:17 pm
Forum: Properties of Light
Topic: Frday's lecture
Replies: 4
Views: 322

Frday's lecture

Im still not sure why if c=lamba v and v=c/lamba give you the equation E= hv= hc/lamba. Is it because you combine both of them, but why would you combine them?can someone explain this to me?
Wed Jun 26, 2019 9:16 pm
Forum: Balancing Chemical Reactions
Topic: H5 7th edition
Replies: 4
Views: 340

H5 7th edition

Does anyone know if the (N3) count towards balancing it . For example, by the (OH)2 having the little 2 at the bottom effect the balancing of the equation. If so why ? And if not why not?
Wed Jun 26, 2019 7:51 pm
Forum: Empirical & Molecular Formulas
Topic: G.17 7th edition
Replies: 1
Views: 269

G.17 7th edition

I understand how you have to multiply the .20(.250)(159.60) for a, but why is it multiplied times .250 if in the problem it says 250 and not .250?