Search found 30 matches

by Rebecca Park
Sat Dec 08, 2018 2:32 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6th Edition Ch12 #49
Replies: 1
Views: 55

Re: 6th Edition Ch12 #49

if it has a smaller pkb, then it has a stronger base but I think lavelle said that we learn that in 14b so we don't really need to know it for the test.
by Rebecca Park
Sat Dec 08, 2018 2:25 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: strong vs weak acids
Replies: 5
Views: 116

Re: strong vs weak acids

There is a table in the textbook that is nicely organized, but for binary, the more polar, the stronger the acid and the more weaker the H-A bond, the stronger the acid. For Oxoacids, the greater the number of Oxygen atoms attached to the central atom gives a stronger acid. If it has the same number...
by Rebecca Park
Sat Dec 08, 2018 2:22 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka and Kb on Final
Replies: 9
Views: 265

Re: Ka and Kb on Final

we don't need to Ka and Kb
by Rebecca Park
Sat Dec 08, 2018 2:20 am
Forum: Naming
Topic: order of ligands when going from name to formula
Replies: 3
Views: 83

Re: order of ligands when going from name to formula

in alphabetical order!
by Rebecca Park
Sun Dec 02, 2018 6:54 pm
Forum: Naming
Topic: Naming
Replies: 2
Views: 56

Re: Naming

it's in alphabetical order and then the ligand is before the transitional metal atom and you have to use prefixes to indicate the number of ligands.
by Rebecca Park
Tue Nov 27, 2018 9:45 am
Forum: Dipole Moments
Topic: Polarizability vs Polarizing power
Replies: 8
Views: 160

Re: Polarizability vs Polarizing power

polarizing power is the way that cations pull electrons from anions
polarizability is the ability to pull the electrons towards the anions
by Rebecca Park
Sun Nov 25, 2018 8:19 pm
Forum: Hybridization
Topic: Test 3
Replies: 13
Views: 196

Re: Test 3

Ionic vs. covalent bonds, the strengths, and then chapter 6. I would just look at the textbook to see what will be on the test.
by Rebecca Park
Sun Nov 25, 2018 8:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Naming the Shape
Replies: 16
Views: 255

Re: Naming the Shape

I think I remember him saying that we won't have to draw it, but I'm not completely sure.
by Rebecca Park
Sun Nov 25, 2018 8:15 pm
Forum: Hybridization
Topic: Polar vs Non Polar
Replies: 3
Views: 73

Re: Polar vs Non Polar

You will either get the electronegativity and if the difference is greater than 0.4, then it will be polar.
If you aren't given the electronegativities, then you have to find it by looking at the shape of the lewis structure
by Rebecca Park
Sun Nov 18, 2018 9:27 pm
Forum: Dipole Moments
Topic: Test
Replies: 15
Views: 267

Re: Test

It's after Thanksgiving break during week 9
by Rebecca Park
Sun Nov 18, 2018 9:27 pm
Forum: Properties of Light
Topic: Test 3
Replies: 24
Views: 581

Re: Test 3

You have to know the lewis structure to do other problems, so I think that it would be incorporated into the test.
by Rebecca Park
Sun Nov 18, 2018 9:25 pm
Forum: General Science Questions
Topic: Thanksgiving Week
Replies: 8
Views: 319

Re: Thanksgiving Week

My TA actually recommends us to go to other discussions if we don't understand something, so I'm sure it would be okay if you would like to join a different discussion.
by Rebecca Park
Wed Nov 14, 2018 12:29 am
Forum: Octet Exceptions
Topic: What are the octet exceptions?
Replies: 9
Views: 227

Re: What are the octet exceptions?

I’m pretty sure there was an exception to Boron for the octet rule.
by Rebecca Park
Wed Nov 14, 2018 12:27 am
Forum: Lewis Structures
Topic: Octet rule question
Replies: 6
Views: 178

Re: Octet rule question

Every element after period 2 can follow the octet rule.
by Rebecca Park
Wed Nov 14, 2018 12:18 am
Forum: Significant Figures
Topic: When to round the answers to significant figures
Replies: 11
Views: 508

Re: When to round the answers to significant figures

I usually round at the very end so I save the numbers in the calculator before rounding the final answer
by Rebecca Park
Sun Nov 04, 2018 6:53 pm
Forum: Properties of Light
Topic: Standard Units
Replies: 8
Views: 218

Re: Standard Units

Normally m, but in the solutions manual, they give both m and nm so I think both will be good
by Rebecca Park
Sun Nov 04, 2018 6:52 pm
Forum: Electronegativity
Topic: How much can you round down for empirical formulas?
Replies: 2
Views: 98

Re: How much can you round down for empirical formulas?

Ya I heard 5%, but I think also if it's not a number that can't really be multiplied to get a whole number, then it should be close enough to round up or down
by Rebecca Park
Sun Nov 04, 2018 6:43 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Post-Module Q#18
Replies: 3
Views: 295

Re: Post-Module Q#18

The radius of the atom represents 1/2 of the uncertainty of the position of the electron, the diameter equaling the entire uncertainty. the size of the atom represents the uncertainty in position. You can use this uncertainty, as well as the mass of an electron and the constant h/4pi to calculate de...
by Rebecca Park
Sun Oct 28, 2018 10:00 pm
Forum: Ionic & Covalent Bonds
Topic: the Octet rule
Replies: 21
Views: 433

Re: the Octet rule

Most of them follow the rules, but I know that Boron is an exception to it even though it only has 6 valence electrons.
by Rebecca Park
Sun Oct 28, 2018 9:58 pm
Forum: Ionic & Covalent Bonds
Topic: Lewis Dot Structures: Ionization Energy
Replies: 6
Views: 132

Re: Lewis Dot Structures: Ionization Energy

Mostly because it has the most open spaces to add
by Rebecca Park
Sun Oct 28, 2018 9:53 pm
Forum: Lewis Structures
Topic: Boron as the Lewis Structure Exception
Replies: 1
Views: 41

Re: Boron as the Lewis Structure Exception

because Boron itself is already stable. It doesn't really make sense because there are rules, but there are a few violations that go against the octet rule.
by Rebecca Park
Sun Oct 28, 2018 9:43 pm
Forum: Lewis Structures
Topic: Dot's in the Lewis Structure
Replies: 10
Views: 206

Re: Dot's in the Lewis Structure

Ya! it doesn't matter in what order you place it
by Rebecca Park
Sun Oct 28, 2018 9:19 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Units
Replies: 8
Views: 201

Re: Units

I've always changed it
by Rebecca Park
Sun Oct 28, 2018 9:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 11
Views: 258

Re: Midterm

I think we have another test after midterms over #3, so they should be equal
by Rebecca Park
Fri Oct 12, 2018 3:35 pm
Forum: Properties of Electrons
Topic: Quantum Theory 1.27
Replies: 1
Views: 70

Re: Quantum Theory 1.27

Find the energy from the lamp by multiplying 32*2=64. Then you can calculate the energy because wavelength is given by using E=hc/wavelength. Divide 64 by what you get to get the number of photons.
by Rebecca Park
Fri Oct 12, 2018 3:32 pm
Forum: Einstein Equation
Topic: Homework Problem 1A.15
Replies: 1
Views: 75

Re: Homework Problem 1A.15

Since the emission is ultraviolet, the transition is in the Lyman Series, n2=1. Convert the 102.6 nm into energy and then plug it into the rydberg formula to solve for n1.
by Rebecca Park
Mon Oct 08, 2018 5:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Periodic Table
Replies: 6
Views: 120

Periodic Table

Will we be getting periodic tables during the test, or do we have to bring our own?
by Rebecca Park
Fri Oct 05, 2018 4:32 pm
Forum: Limiting Reactant Calculations
Topic: Mole Ratios Within the Conversion
Replies: 3
Views: 73

Re: Mole Ratios Within the Conversion

Idk if I completely get your question, but I think you have to find the limiting reactant between CO2 and H20, then whichever one is the limiting reactant (let's say CO2), you would have to multiply the limiting reactant to the ratio of the moles. So mole of O2 (6) would be on the numerator and mole...
by Rebecca Park
Fri Oct 05, 2018 4:25 pm
Forum: Properties of Light
Topic: Homework Question
Replies: 2
Views: 76

Re: Homework Question

I think so
by Rebecca Park
Fri Oct 05, 2018 4:18 pm
Forum: Molarity, Solutions, Dilutions
Topic: Problem G5
Replies: 8
Views: 210

Re: Problem G5

Molarity=moles of solute (n)/volume of solution (v) is essentially the same thing as Mi*Vi=Mf*Vf. If you multiply the volume of solution over to Molarity, you get M*V=n and n initial= n final, which gives you m initial* v initial= mfinal* vfinal. You just see what information is given to you and the...

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