Search found 30 matches

by Sana_Mian_3G
Fri Dec 07, 2018 10:55 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate and Monodentate
Replies: 1
Views: 55

Polydentate and Monodentate

Could some give the general definition of polydentate and monodentate ligands with examples.
by Sana_Mian_3G
Fri Dec 07, 2018 10:49 am
Forum: Conjugate Acids & Bases
Topic: Chemical Equations
Replies: 6
Views: 160

Chemical Equations

Is there a way to identify the conjugate acid or base in a chemical equation? Could someone explain it with an example.
by Sana_Mian_3G
Fri Dec 07, 2018 10:47 am
Forum: Naming
Topic: Naming Coordination Compounds
Replies: 3
Views: 76

Naming Coordination Compounds

How do we find the charge of the transition metal? Is there a way to memorize it?
by Sana_Mian_3G
Fri Nov 30, 2018 4:10 pm
Forum: Sigma & Pi Bonds
Topic: Triple bond?
Replies: 11
Views: 318

Triple bond?

If there is a triple bond how many pi and sigma bonds are there?
by Sana_Mian_3G
Fri Nov 30, 2018 2:59 pm
Forum: Hybridization
Topic: 2s or s?
Replies: 7
Views: 102

2s or s?

When do you use 2s or s for hybridization?
by Sana_Mian_3G
Fri Nov 23, 2018 10:51 pm
Forum: SI Units, Unit Conversions
Topic: What Unit of Mass to Use?
Replies: 5
Views: 319

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.
by Sana_Mian_3G
Fri Nov 23, 2018 10:45 pm
Forum: Electronegativity
Topic: Largest Electronegativity
Replies: 4
Views: 96

Largest Electronegativity

Which element would have the largest electronegativity?
by Sana_Mian_3G
Fri Nov 23, 2018 10:41 pm
Forum: Electronegativity
Topic: Nonmetals?
Replies: 1
Views: 61

Nonmetals?

Are nonmetals more electronegative than metals? Does this have to do with their placement on the periodic table?
by Sana_Mian_3G
Fri Nov 23, 2018 10:41 pm
Forum: Electronegativity
Topic: Nonmetals?
Replies: 3
Views: 134

Nonmetals?

Are nonmetals more electronegative than metals? Does this have to do with their placement on the periodic table?
by Sana_Mian_3G
Fri Nov 16, 2018 10:43 am
Forum: Properties of Light
Topic: Problem A15
Replies: 2
Views: 201

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.
by Sana_Mian_3G
Fri Nov 16, 2018 10:38 am
Forum: SI Units, Unit Conversions
Topic: lewis structure shape
Replies: 6
Views: 268

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.
by Sana_Mian_3G
Fri Nov 16, 2018 10:35 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Linear Example
Replies: 4
Views: 61

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?
by Sana_Mian_3G
Fri Nov 09, 2018 10:40 am
Forum: Electronegativity
Topic: Electronegativity relationship with Polarizability
Replies: 3
Views: 122

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.
by Sana_Mian_3G
Fri Nov 09, 2018 10:36 am
Forum: DeBroglie Equation
Topic: Hw problem 1.37- 6th edition
Replies: 3
Views: 205

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.
by Sana_Mian_3G
Fri Nov 09, 2018 10:25 am
Forum: Electronegativity
Topic: Electronegativity
Replies: 4
Views: 84

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).
by Sana_Mian_3G
Fri Nov 02, 2018 10:41 am
Forum: Properties of Light
Topic: Using a rounded speed of light in EM problems
Replies: 4
Views: 181

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.
by Sana_Mian_3G
Fri Nov 02, 2018 10:38 am
Forum: Significant Figures
Topic: Calculating process
Replies: 5
Views: 331

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.
by Sana_Mian_3G
Fri Nov 02, 2018 10:27 am
Forum: Quantum Numbers and The H-Atom
Topic: Spin Quantum Number
Replies: 1
Views: 56

Spin Quantum Number

How do you know if a quantum number is 1/2 or -1/2?
by Sana_Mian_3G
Fri Oct 26, 2018 10:39 am
Forum: Quantum Numbers and The H-Atom
Topic: Degeneracy
Replies: 7
Views: 300

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?
by Sana_Mian_3G
Fri Oct 26, 2018 10:34 am
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 8
Views: 131

Electron Affinity

What are the trends in the periodic table related to electron affinity? Also, is there any way to memorize it?
by Sana_Mian_3G
Fri Oct 26, 2018 10:31 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Question 1F: 1
Replies: 1
Views: 51

Question 1F: 1

For this problem do we just have to look at the periodic table to figure out the atomic radius?
by Sana_Mian_3G
Fri Oct 19, 2018 11:19 am
Forum: Properties of Light
Topic: Do I have to memorize the spectrum?
Replies: 20
Views: 332

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.
by Sana_Mian_3G
Fri Oct 19, 2018 11:17 am
Forum: Photoelectric Effect
Topic: Post-Module Assessment Q15
Replies: 1
Views: 65

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
by Sana_Mian_3G
Fri Oct 19, 2018 10:54 am
Forum: Photoelectric Effect
Topic: Post-Module Assessment Q12
Replies: 1
Views: 59

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...
by Sana_Mian_3G
Thu Oct 11, 2018 11:48 pm
Forum: Properties of Light
Topic: speed of light
Replies: 8
Views: 136

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.
by Sana_Mian_3G
Thu Oct 11, 2018 11:38 pm
Forum: Einstein Equation
Topic: Units for v(frequency)
Replies: 11
Views: 158

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.
by Sana_Mian_3G
Thu Oct 11, 2018 11:35 pm
Forum: Properties of Light
Topic: HW 1A.9 [ENDORSED]
Replies: 4
Views: 62

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
by Sana_Mian_3G
Thu Oct 04, 2018 10:21 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Percision and Accuracy
Replies: 5
Views: 107

Percision and Accuracy

I was wondering if someone could give an example of precision and accuracy related to chemistry/lab.
by Sana_Mian_3G
Thu Oct 04, 2018 10:06 pm
Forum: Empirical & Molecular Formulas
Topic: Post-Module Assessment Q22
Replies: 3
Views: 82

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.
by Sana_Mian_3G
Thu Oct 04, 2018 9:42 pm
Forum: Significant Figures
Topic: Sig Figs?
Replies: 3
Views: 70

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

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