Search found 30 matches
- Fri Dec 07, 2018 10:55 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate and Monodentate
- Replies: 1
- Views: 240
Polydentate and Monodentate
Could some give the general definition of polydentate and monodentate ligands with examples.
- Fri Dec 07, 2018 10:49 am
- Forum: Conjugate Acids & Bases
- Topic: Chemical Equations
- Replies: 6
- Views: 660
Chemical Equations
Is there a way to identify the conjugate acid or base in a chemical equation? Could someone explain it with an example.
- Fri Dec 07, 2018 10:47 am
- Forum: Naming
- Topic: Naming Coordination Compounds
- Replies: 3
- Views: 361
Naming Coordination Compounds
How do we find the charge of the transition metal? Is there a way to memorize it?
- Fri Nov 30, 2018 4:10 pm
- Forum: Sigma & Pi Bonds
- Topic: Triple bond?
- Replies: 18
- Views: 1616
Triple bond?
If there is a triple bond how many pi and sigma bonds are there?
- Fri Nov 30, 2018 2:59 pm
- Forum: Hybridization
- Topic: 2s or s?
- Replies: 7
- Views: 610
2s or s?
When do you use 2s or s for hybridization?
- Fri Nov 23, 2018 10:51 pm
- Forum: SI Units, Unit Conversions
- Topic: What Unit of Mass to Use?
- Replies: 5
- Views: 900
Re: What Unit of Mass to Use?
kg are used sometimes when converting Joules. I think looking at the problem first and trying to figure out what the problem is asking will help with what units are needed.
- Fri Nov 23, 2018 10:45 pm
- Forum: Electronegativity
- Topic: Largest Electronegativity
- Replies: 4
- Views: 410
Largest Electronegativity
Which element would have the largest electronegativity?
- Fri Nov 23, 2018 10:41 pm
- Forum: Electronegativity
- Topic: Nonmetals?
- Replies: 2
- Views: 400
Nonmetals?
Are nonmetals more electronegative than metals? Does this have to do with their placement on the periodic table?
- Fri Nov 23, 2018 10:41 pm
- Forum: Electronegativity
- Topic: Nonmetals?
- Replies: 6
- Views: 690
Nonmetals?
Are nonmetals more electronegative than metals? Does this have to do with their placement on the periodic table?
- Fri Nov 16, 2018 10:43 am
- Forum: Properties of Light
- Topic: Problem A15
- Replies: 2
- Views: 499
Re: Problem A15
Another equation that can be used is En= -hR/n^2. Use this equation with both n values and then subtract them from each other to get the answer.
- Fri Nov 16, 2018 10:38 am
- Forum: SI Units, Unit Conversions
- Topic: lewis structure shape
- Replies: 6
- Views: 898
Re: lewis structure shape
You can figure out the different shapes based on the number of bonds and lone pairs of the compound. Also, the number of lone pairs of the compound.
- Fri Nov 16, 2018 10:35 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Linear Example
- Replies: 4
- Views: 513
Linear Example
The linear example given in lecture uses BeCl2. I was wondering in the lewis structure why doesn't Be have lone pair electrons?
- Fri Nov 09, 2018 10:40 am
- Forum: Electronegativity
- Topic: Electronegativity relationship with Polarizability
- Replies: 3
- Views: 745
Electronegativity relationship with Polarizability
What is the relationship with the electronegativity and polarizability? Also, could someone write the definition of them so I have a better understanding.
- Fri Nov 09, 2018 10:36 am
- Forum: DeBroglie Equation
- Topic: Hw problem 1.37- 6th edition
- Replies: 3
- Views: 681
Re: Hw problem 1.37- 6th edition
De Broglie Equation is used because the proton and the neutron are not involved with a photon, or light, so that is why this equation is used. The mass of a proton and a neutron are giving on the equation and constant sheet.
- Fri Nov 09, 2018 10:25 am
- Forum: Electronegativity
- Topic: Electronegativity
- Replies: 4
- Views: 409
Re: Electronegativity
Yes, I believe they are the same trends. However, I think that electron affinity is greater on the top right of the periodic table (like near the Nobel gases).
- Fri Nov 02, 2018 10:41 am
- Forum: Properties of Light
- Topic: Using a rounded speed of light in EM problems
- Replies: 4
- Views: 654
Re: Using a rounded speed of light in EM problems
I also have the same problem because in class we used 3.00, but on the constant sheet another value is given for the speed of light. On the test I used 3.00 and got the right answer so I think this value would be easier to use when using a calculator.
- Fri Nov 02, 2018 10:38 am
- Forum: Significant Figures
- Topic: Calculating process
- Replies: 5
- Views: 838
Re: Calculating process
When calculation the problem you should keep the value in its original form so the number at the end is precise. Also, you would have two sig figs in the answer because you look at the least amount of sig figs in the question.
- Fri Nov 02, 2018 10:27 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Spin Quantum Number
- Replies: 1
- Views: 205
Spin Quantum Number
How do you know if a quantum number is 1/2 or -1/2?
- Fri Oct 26, 2018 10:39 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Degeneracy
- Replies: 7
- Views: 3216
Re: Degeneracy
I know that n equals the energy level. So would that mean if they have the same energy level would it just be n=3 or 3s, 3p, and 3d?
- Fri Oct 26, 2018 10:34 am
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity
- Replies: 8
- Views: 662
Electron Affinity
What are the trends in the periodic table related to electron affinity? Also, is there any way to memorize it?
- Fri Oct 26, 2018 10:31 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Question 1F: 1
- Replies: 1
- Views: 225
Question 1F: 1
For this problem do we just have to look at the periodic table to figure out the atomic radius?
- Fri Oct 19, 2018 11:19 am
- Forum: Properties of Light
- Topic: Do I have to memorize the spectrum?
- Replies: 20
- Views: 1478
Re: Do I have to memorize the spectrum?
I don't think that you have to memorize the spectrum, but I think we would need to know the inverse relationship with frequency and wavelength.
- Fri Oct 19, 2018 11:17 am
- Forum: Photoelectric Effect
- Topic: Post-Module Assessment Q15
- Replies: 1
- Views: 234
Post-Module Assessment Q15
Were we given an equation to solve this problem?
If 1 million high energy photons hit a metal surface what is the maximum number of electrons that could be ejected from the metal surface?
A. 100,000
B. 0.5 Million.
C. < 1 Million.
D. 1 Million.
E. None of the above
If 1 million high energy photons hit a metal surface what is the maximum number of electrons that could be ejected from the metal surface?
A. 100,000
B. 0.5 Million.
C. < 1 Million.
D. 1 Million.
E. None of the above
- Fri Oct 19, 2018 10:54 am
- Forum: Photoelectric Effect
- Topic: Post-Module Assessment Q12
- Replies: 1
- Views: 239
Post-Module Assessment Q12
I was wondering what the answer to this question is and why? In a photoelectric experiment light hits a metal surface and if the energy of the ________ light is ________ enough it causes electrons to be ejected from the metal surface. A. outgoing, large B. outgoing, small C. incoming, large D. incom...
- Thu Oct 11, 2018 11:48 pm
- Forum: Properties of Light
- Topic: speed of light
- Replies: 8
- Views: 640
Re: speed of light
I think in lecture he said that the speed of light in a vacuum is 3.0x10^8 m/s, but I would probably go off the "Constants and Equations" worksheet on the website.
- Thu Oct 11, 2018 11:38 pm
- Forum: Einstein Equation
- Topic: Units for v(frequency)
- Replies: 11
- Views: 1180
Re: Units for v(frequency)
They can both be used, but I would check the what the problem is asking for and the units that are needed.
- Thu Oct 11, 2018 11:35 pm
- Forum: Properties of Light
- Topic: HW 1A.9 [ENDORSED]
- Replies: 4
- Views: 257
Re: HW 1A.9 [ENDORSED]
E = hf = hc/λ. This is the equation that is needed and the constant needed is h = 6.62608 × 10^–34 J.s
- Thu Oct 04, 2018 10:21 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Percision and Accuracy
- Replies: 5
- Views: 640
Percision and Accuracy
I was wondering if someone could give an example of precision and accuracy related to chemistry/lab.
- Thu Oct 04, 2018 10:06 pm
- Forum: Empirical & Molecular Formulas
- Topic: Post-Module Assessment Q22
- Replies: 3
- Views: 326
Post-Module Assessment Q22
Find the molecular formula for 39.43% C, 52.58% O, and 7.88% H.
I was wondering if someone could explain what the steps are after we find the moles through the empirical formula?
These are the moles I got:
C: 1 mol
O: 1.001 mol
H: 2.376 mol
Also, could someone post the answer so I can check.
I was wondering if someone could explain what the steps are after we find the moles through the empirical formula?
These are the moles I got:
C: 1 mol
O: 1.001 mol
H: 2.376 mol
Also, could someone post the answer so I can check.
- Thu Oct 04, 2018 9:42 pm
- Forum: Significant Figures
- Topic: Sig Figs?
- Replies: 3
- Views: 449
Re: Sig Figs?
Also, there is another rule for sig figs with decimal points. Zero's count with decimal, but zero's don't count without decimals.
Example: 420 is two sig figs, but 420. is three sig figs
Example: 420 is two sig figs, but 420. is three sig figs