Search found 33 matches
- Tue Jul 30, 2019 11:46 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Angles
- Replies: 2
- Views: 433
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: 394
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: 514
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: 450
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: 439
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: 566
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: 471
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: 738
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: 424
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: 573
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: 739
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: 488
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: 2606
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: 1199
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: 621
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: 873
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: 1480
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: 1128
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: 491
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: 678
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: 2700
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: 486
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: 328
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: 616
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: 929
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: 371
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: 397
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: 1052
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: 8516
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 [ENDORSED]
- Replies: 52
- Views: 18580
Re: E=hv [ENDORSED]
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: 520
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: 519
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: 389
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?