Search found 29 matches

by Layla Manoochehri
Sat Dec 08, 2018 9:15 pm
Forum: Air Pollution & Acid Rain
Topic: acid rain
Replies: 1
Views: 130

acid rain

is there a section in the textbook that talks about acid rain? i can't find anything (i have the 6th edition)
by Layla Manoochehri
Sat Dec 08, 2018 9:08 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: polarizability/polarizing power test 3
Replies: 3
Views: 156

polarizability/polarizing power test 3

"order these anions in order from least to most polarizable: At^-, Cl^-, O^2-, N^3-" "order these cations in order from least to most polarizing power: Be^2+, Sr^2+, Rb^+, Na^2+" I got these wrong on the test (question 6), can anyone tell me what the right order was for them? tha...
by Layla Manoochehri
Mon Dec 03, 2018 1:41 am
Forum: Determining Molecular Shape (VSEPR)
Topic: C6H4
Replies: 2
Views: 75

C6H4

For C6H4, why are the two C atoms that are sp and not sp2 constrained?
by Layla Manoochehri
Mon Dec 03, 2018 1:40 am
Forum: Hybridization
Topic: s character
Replies: 3
Views: 61

s character

in the textbook it said "as the s-character of a hybrid orbital increases, the bond angle increases", can someone explain this? what is s-character?
by Layla Manoochehri
Mon Dec 03, 2018 1:38 am
Forum: Bronsted Acids & Bases
Topic: Bronsted v Lewis
Replies: 3
Views: 79

Bronsted v Lewis

Can someone explain why every Bronsted base is a Lewis base, but not every Lewis base is a Bronsted base?
by Layla Manoochehri
Sun Nov 25, 2018 7:56 pm
Forum: Photoelectric Effect
Topic: Midterm Q3B
Replies: 1
Views: 205

Midterm Q3B

"Calculate the ionization energy of a rubidium atom, given that radiation of wavelength 58.4 nm produces electrons with a speed of 2450 km/s. Recall that 1 J = 1 kg.m^2.s^-2"

Can anyone show me how to solve this?
by Layla Manoochehri
Sun Nov 25, 2018 7:51 pm
Forum: Properties of Electrons
Topic: excitation
Replies: 2
Views: 165

excitation

when an excitation in an atom occurs, does the electron lose or gain energy? i got this wrong on one of our tests so does anyone mind explaining it to me? thanks!
by Layla Manoochehri
Sun Nov 25, 2018 7:49 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Momentum Uncertainty
Replies: 3
Views: 190

Momentum Uncertainty

can anyone explain how decreasing the uncertainty in momentum affects the uncertainty in wavelength?
by Layla Manoochehri
Sun Nov 18, 2018 10:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pair influence on shape
Replies: 12
Views: 182

lone pair influence on shape

can someone explain conceptually why the presence of a lone pair will change the shape, for example from linear to bent?
by Layla Manoochehri
Sun Nov 18, 2018 8:34 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate Covalent Bond Definition
Replies: 14
Views: 547

Re: Coordinate Covalent Bond Definition

are coordinate covalent bonds the bonds found when an element has a deficient octet? i feel like i remember reading that or hearing it in lecture but im not quite sure
by Layla Manoochehri
Sun Nov 18, 2018 8:28 pm
Forum: Bond Lengths & Energies
Topic: Bond Length
Replies: 9
Views: 251

Re: Bond Length

how do we know the bond length? is it something we have to look up?
by Layla Manoochehri
Sun Nov 11, 2018 10:05 pm
Forum: Dipole Moments
Topic: dipole distance
Replies: 3
Views: 66

dipole distance

just to clarify, how important is the distance between the molecules for the dipole dipole interaction?
by Layla Manoochehri
Sun Nov 11, 2018 9:56 pm
Forum: Dipole Moments
Topic: Test
Replies: 15
Views: 233

Test

Does anyone know when the next test is following the midterm we just took this week? I'm assuming it would mostly cover molecular shape/structure but I'm just wondering. I wasn't able to find it in the syllabus
by Layla Manoochehri
Mon Nov 05, 2018 12:36 am
Forum: Ionic & Covalent Bonds
Topic: Lattice energies of solids
Replies: 1
Views: 46

Lattice energies of solids

For the midterm do we need to know how to find the relative lattice energies of solids (like example 3.2 in the 6th edition of the textbook)? I don't remember learning about this in lecture / don't see it in my notes but I just want to make sure!
by Layla Manoochehri
Sun Nov 04, 2018 11:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d and 4s
Replies: 4
Views: 125

3d and 4s

can someone explain the 3d and 4s orbital configuration conceptually? im not quite sure i understand it
by Layla Manoochehri
Sun Nov 04, 2018 11:13 pm
Forum: Trends in The Periodic Table
Topic: 6th Edition 2.71
Replies: 4
Views: 66

Re: 6th Edition 2.71

i don't think so. maybe know the concept and generally what it is, but i'd say focus on main periodic trends like trends in atomic radius, ionic radius, ionization energy, and electron affinity for the midterm.
by Layla Manoochehri
Sun Nov 04, 2018 11:09 pm
Forum: Trends in The Periodic Table
Topic: ionization energy & electron affinity
Replies: 3
Views: 103

ionization energy & electron affinity

how are ionization energy and electron affinity related? what are the differences between them?
by Layla Manoochehri
Sun Oct 28, 2018 9:51 pm
Forum: Ionic & Covalent Bonds
Topic: Interactions between ions
Replies: 3
Views: 107

Interactions between ions

So should we completely skip the "Interactions between ions" section of the textbook? do we not need to know to the coulomb potential energy of the interaction of two ions?
by Layla Manoochehri
Sun Oct 28, 2018 9:36 pm
Forum: Trends in The Periodic Table
Topic: Diagonal Relationship
Replies: 3
Views: 82

Diagonal Relationship

Can someone explain what a diagonal relationship is / how it arises? I'm kinda confused. Thanks!
by Layla Manoochehri
Sun Oct 28, 2018 9:24 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy [ENDORSED]
Replies: 7
Views: 144

Re: Ionization Energy [ENDORSED]

can someone explain why the ionization energy for oxygen is lower than the ionization energy for nitrogen or fluorine?
by Layla Manoochehri
Sun Oct 21, 2018 7:31 pm
Forum: Trends in The Periodic Table
Topic: Period Table 'blocks'
Replies: 5
Views: 72

Re: Period Table 'blocks'

do we need to know these blocks for the test this week? i know he said we'd only need to know information covered until friday of week 3 but i can't really remember if we went over this quickly and i just don't remember, or if we don't need to know it for this test.
by Layla Manoochehri
Sun Oct 21, 2018 7:29 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Test Two: Electron Configuration
Replies: 6
Views: 131

Re: Test Two: Electron Configuration

does this include knowing the appearances of the orbitals like the d-orbital?
by Layla Manoochehri
Sun Oct 21, 2018 7:22 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Equation
Replies: 6
Views: 144

Re: Equation

im confused, is it h/4π or is it h(bar)/2? or are they the same thing?
by Layla Manoochehri
Sun Oct 21, 2018 7:03 pm
Forum: Photoelectric Effect
Topic: Test 2
Replies: 16
Views: 368

Re: Test 2

In example 1.4 of the 6th edition of the textbook it has you calculate the energy of a single photon and then the energy per mole of photons, so i think its important that you remember things like avogadro's number from test 1 because they're fundamentals and will probably show up again on other tes...
by Layla Manoochehri
Sun Oct 21, 2018 5:52 pm
Forum: *Black Body Radiation
Topic: Black Body
Replies: 9
Views: 363

Re: Black Body

so does that mean we don't need to know about the Stefan-Boltzmann law or Wien's law?
by Layla Manoochehri
Sun Oct 21, 2018 4:28 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Lyman vs Balmer
Replies: 6
Views: 130

Re: Lyman vs Balmer

should we focus on knowing how to use the equation or just being able to identify the series based on what we're given?
by Layla Manoochehri
Sun Oct 07, 2018 10:46 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular Formula
Replies: 12
Views: 137

Re: Molecular Formula

so how do I know what order to put the elements in when naming it then?
by Layla Manoochehri
Sun Oct 07, 2018 10:16 pm
Forum: Properties of Light
Topic: C=Delta x V
Replies: 6
Views: 82

Re: C=Delta x V

c is a constant, for speed of light in a vacuum. in class Dr. Lavelle said it's 3.00 x 10^8 m/s.
by Layla Manoochehri
Sun Oct 07, 2018 10:00 pm
Forum: SI Units, Unit Conversions
Topic: What is the notation for molar mass?
Replies: 15
Views: 562

Re: What is the notation for molar mass?

Clarifying question, is g/mol the same as g.mol^-1 ?

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