Search found 21 matches

by Lenaschelzig1C
Sun Jun 10, 2018 11:40 pm
Forum: Hybridization
Topic: Bond types
Replies: 4
Views: 196

Re: Bond types

My guess is yes, and it is usually helpful to know what force is being used when completing a problem. :)
by Lenaschelzig1C
Sun Jun 10, 2018 11:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Exact Bond Angle [ENDORSED]
Replies: 2
Views: 89

Re: Determining Exact Bond Angle [ENDORSED]

My ta said that it was okay just to know that it is less than 120 degrees!
by Lenaschelzig1C
Sun Jun 10, 2018 11:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Help on HW#4.9 [ENDORSED]
Replies: 3
Views: 121

Re: Help on HW#4.9 [ENDORSED]

Yes! A lot of the middle block elements have expanded octets!
by Lenaschelzig1C
Sun May 27, 2018 9:14 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 3
Views: 250

Re: PV=nRT

I agree. I think that you can only transfer formulas if they are the same state of matter.
by Lenaschelzig1C
Sun May 27, 2018 9:10 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge vs Oxidation Numbers
Replies: 2
Views: 207

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.
by Lenaschelzig1C
Sun May 27, 2018 8:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Difference in angles
Replies: 3
Views: 85

Re: Difference in angles

bond angles show how far the bonds can be placed from each other!
by Lenaschelzig1C
Sun May 20, 2018 10:35 pm
Forum: Lewis Structures
Topic: in class example bf^3 [ENDORSED]
Replies: 2
Views: 100

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.
by Lenaschelzig1C
Sun May 20, 2018 10:29 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge in (S2CO)2-
Replies: 3
Views: 627

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.
by Lenaschelzig1C
Sun May 20, 2018 10:22 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 9
Views: 384

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.
by Lenaschelzig1C
Sun May 06, 2018 10:38 pm
Forum: Properties of Light
Topic: HW Q
Replies: 3
Views: 184

Re: HW Q

Because you know all of the unknown variables except for the final n value, you can solve for it!
by Lenaschelzig1C
Sun May 06, 2018 10:34 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Atom's diameter
Replies: 2
Views: 159

Re: Atom's diameter

It takes into consideration the uncertainty of Bohr's model of the atom
by Lenaschelzig1C
Sun May 06, 2018 10:27 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Percentages When Solving for Molecular Formula
Replies: 2
Views: 193

Re: Percentages When Solving for Molecular Formula

Also, assuming that the percentages equal 100 grams will help get the empirical formula!
by Lenaschelzig1C
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: 194

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.
by Lenaschelzig1C
Sun Apr 29, 2018 11:11 pm
Forum: Trends in The Periodic Table
Topic: s, p, d, f
Replies: 16
Views: 340

Re: s, p, d, f

Also, different orbitals are different sizes and shapes
by Lenaschelzig1C
Wed Apr 25, 2018 12:11 am
Forum: Photoelectric Effect
Topic: calculating the number of photons
Replies: 2
Views: 99

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?
by Lenaschelzig1C
Sun Apr 15, 2018 10:53 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Isotopes [ENDORSED]
Replies: 12
Views: 366

Re: Isotopes [ENDORSED]

isotopes have the same number of protons, but different number of neutrons in the nuclei!
by Lenaschelzig1C
Sun Apr 15, 2018 10:50 pm
Forum: Properties of Light
Topic: wave length
Replies: 5
Views: 103

Re: wave length

amplitude shows how tall the wave is. By doing this, it determines how intense the light is.
by Lenaschelzig1C
Sun Apr 15, 2018 10:47 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Special Orbitals
Replies: 2
Views: 105

Special Orbitals

How do you know when an element fills the orbitals abnormally? Is there something that indicates this?
by Lenaschelzig1C
Sun Apr 15, 2018 10:42 pm
Forum: SI Units, Unit Conversions
Topic: kJ vs. J
Replies: 4
Views: 531

Re: kJ vs. J

I typically just answer in the given unit unless otherwise specified.
by Lenaschelzig1C
Sun Apr 15, 2018 10:39 pm
Forum: Balancing Chemical Reactions
Topic: Whole numbers
Replies: 7
Views: 300

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.
by Lenaschelzig1C
Sun Apr 15, 2018 10:37 pm
Forum: Properties of Light
Topic: Units for wavelengths [ENDORSED]
Replies: 6
Views: 198

Re: Units for wavelengths [ENDORSED]

It is usually expressed in nanometers because wavelengths are so small.

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