Search found 21 matches
- Sun Jun 10, 2018 11:40 pm
- Forum: Hybridization
- Topic: Bond types
- Replies: 4
- Views: 644
Re: Bond types
My guess is yes, and it is usually helpful to know what force is being used when completing a problem. :)
- Sun Jun 10, 2018 11:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Exact Bond Angle [ENDORSED]
- Replies: 2
- Views: 489
Re: Determining Exact Bond Angle [ENDORSED]
My ta said that it was okay just to know that it is less than 120 degrees!
- Sun Jun 10, 2018 11:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Help on HW#4.9 [ENDORSED]
- Replies: 3
- Views: 493
Re: Help on HW#4.9 [ENDORSED]
Yes! A lot of the middle block elements have expanded octets!
- Sun May 27, 2018 9:14 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 3
- Views: 673
Re: PV=nRT
I agree. I think that you can only transfer formulas if they are the same state of matter.
- Sun May 27, 2018 9:10 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge vs Oxidation Numbers
- Replies: 2
- Views: 718
Re: Formal Charge vs Oxidation Numbers
Formal charge helps to describe the number of bonds and electrons that are associated with each atom. Oxidation numbers refer to the total number of gained or lost electrons.
- Sun May 27, 2018 8:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Difference in angles
- Replies: 3
- Views: 439
Re: Difference in angles
bond angles show how far the bonds can be placed from each other!
- Sun May 20, 2018 10:35 pm
- Forum: Lewis Structures
- Topic: in class example bf^3 [ENDORSED]
- Replies: 2
- Views: 487
Re: in class example bf^3 [ENDORSED]
Boron has 5 valence electrons, meaning it will share 3 electrons with another atom in order to form an octet.
- Sun May 20, 2018 10:29 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal charge in (S2CO)2-
- Replies: 3
- Views: 4402
Re: Formal charge in (S2CO)2-
I agree. I think that by placing both charges on the sulfer atoms, you get a more stable structure.
- Sun May 20, 2018 10:22 pm
- Forum: Resonance Structures
- Topic: Resonance Structures
- Replies: 9
- Views: 1157
Re: Resonance Structures
I think that the resonance structures can have different bond placements, making the formal charge different in some cases. However, if the same elements in each are bonded, then the charge will be the same.
- Sun May 06, 2018 10:38 pm
- Forum: Properties of Light
- Topic: HW Q
- Replies: 3
- Views: 502
Re: HW Q
Because you know all of the unknown variables except for the final n value, you can solve for it!
- Sun May 06, 2018 10:34 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Atom's diameter
- Replies: 2
- Views: 429
Re: Atom's diameter
It takes into consideration the uncertainty of Bohr's model of the atom
- Sun May 06, 2018 10:27 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Percentages When Solving for Molecular Formula
- Replies: 2
- Views: 540
Re: Percentages When Solving for Molecular Formula
Also, assuming that the percentages equal 100 grams will help get the empirical formula!
- Sun Apr 29, 2018 11:23 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Atomic Spectra Post Module #29 [ENDORSED]
- Replies: 3
- Views: 539
Re: Atomic Spectra Post Module #29 [ENDORSED]
To find the number of photons. you would use a chart like Figure 1.1 in the textbook to find the energy of one photon, and then divide the total energy of the source by the energy of one photon to find the number of photons.
- Sun Apr 29, 2018 11:11 pm
- Forum: Trends in The Periodic Table
- Topic: s, p, d, f
- Replies: 16
- Views: 4343
Re: s, p, d, f
Also, different orbitals are different sizes and shapes
- Wed Apr 25, 2018 12:11 am
- Forum: Photoelectric Effect
- Topic: calculating the number of photons
- Replies: 2
- Views: 411
calculating the number of photons
On homework question number 27, it asks for the number of photons generated by a light. How would you go about finding this?
- Sun Apr 15, 2018 10:53 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Isotopes [ENDORSED]
- Replies: 12
- Views: 1513
Re: Isotopes [ENDORSED]
isotopes have the same number of protons, but different number of neutrons in the nuclei!
- Sun Apr 15, 2018 10:50 pm
- Forum: Properties of Light
- Topic: wave length
- Replies: 5
- Views: 456
Re: wave length
amplitude shows how tall the wave is. By doing this, it determines how intense the light is.
- Sun Apr 15, 2018 10:47 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Special Orbitals
- Replies: 2
- Views: 364
Special Orbitals
How do you know when an element fills the orbitals abnormally? Is there something that indicates this?
- Sun Apr 15, 2018 10:42 pm
- Forum: SI Units, Unit Conversions
- Topic: kJ vs. J
- Replies: 4
- Views: 1455
Re: kJ vs. J
I typically just answer in the given unit unless otherwise specified.
- Sun Apr 15, 2018 10:39 pm
- Forum: Balancing Chemical Reactions
- Topic: Whole numbers
- Replies: 7
- Views: 920
Re: Whole numbers
Because you can not have half of an atom, you have to make them whole numbers. Also, you have to make sure that you only change the coefficient only because changing subscripts would change the composition of the molecule.
- Sun Apr 15, 2018 10:37 pm
- Forum: Properties of Light
- Topic: Units for wavelengths [ENDORSED]
- Replies: 6
- Views: 662
Re: Units for wavelengths [ENDORSED]
It is usually expressed in nanometers because wavelengths are so small.