Search found 100 matches

by Alexis Robles 2k
Sat Mar 14, 2020 1:13 pm
Forum: Administrative Questions and Class Announcements
Topic: online
Replies: 3
Views: 49

Re: online

It will most likely be printed and scanned once we finish. But we do not know until Lavelle emails us later today.
by Alexis Robles 2k
Sat Mar 14, 2020 1:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Final time
Replies: 5
Views: 115

Final time

So the online final is going to be at the same time as if it were the in-person final?
by Alexis Robles 2k
Thu Mar 12, 2020 3:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Format
Replies: 2
Views: 88

Final Format

If the final is going to be shorter and still be 180 points, is each problem going to worth 30 points? 40 points?
by Alexis Robles 2k
Thu Mar 12, 2020 3:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Format because I posted in 14A by accident
Replies: 8
Views: 126

Re: Format because I posted in 14A by accident

As of right now, we do not know. All he said that it is short and open book final.
by Alexis Robles 2k
Tue Mar 10, 2020 6:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework 10
Replies: 11
Views: 125

Homework 10

How will we turn in week 10 homework assignment if classes are now online? Or do we still go to discussion?
by Alexis Robles 2k
Sun Mar 08, 2020 9:46 pm
Forum: First Order Reactions
Topic: first order reaction vs second order reaction
Replies: 2
Views: 17

first order reaction vs second order reaction

What is the difference between the first-order and the second-order? When do we use one over the other? Thanks
by Alexis Robles 2k
Sun Mar 08, 2020 9:43 pm
Forum: General Rate Laws
Topic: Rate Law equations
Replies: 1
Views: 31

Rate Law equations

When do we use the rate law equation?
by Alexis Robles 2k
Sun Mar 08, 2020 9:39 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: K
Replies: 11
Views: 69

Re: K

K is not dependent on the concentration of the products and reactants. K is only dependent on temperature and activation energy.
by Alexis Robles 2k
Sun Mar 08, 2020 9:35 pm
Forum: Administrative Questions and Class Announcements
Topic: HW10
Replies: 3
Views: 53

Re: HW10

Yes, it will be the last homework assignment for the quarter.
by Alexis Robles 2k
Sun Mar 08, 2020 9:34 pm
Forum: General Science Questions
Topic: Test 2 Grades [ENDORSED]
Replies: 23
Views: 538

Re: Test 2 Grades [ENDORSED]

We will probably get them back in week ten discussion?
by Alexis Robles 2k
Sun Mar 01, 2020 9:41 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 4
Views: 51

Nernst Equation

When do we use the Nernst equation compared to the other equations for electrochemistry?
by Alexis Robles 2k
Sun Mar 01, 2020 9:39 pm
Forum: General Science Questions
Topic: HW Problems for Test 2
Replies: 5
Views: 178

Re: HW Problems for Test 2

Only 5g and 5j as 4i and 4j were on the midterm
by Alexis Robles 2k
Sun Mar 01, 2020 9:38 pm
Forum: General Science Questions
Topic: Test 2
Replies: 16
Views: 312

Re: Test 2

Test 2 will cover the second page of thermodynamics and all of electrochemistry.
by Alexis Robles 2k
Sun Mar 01, 2020 9:37 pm
Forum: General Science Questions
Topic: Test 2
Replies: 12
Views: 285

Re: Test 2

It should be similar to test 1, so around 7-10 questions.
by Alexis Robles 2k
Sun Mar 01, 2020 9:35 pm
Forum: General Science Questions
Topic: Review Sessions for Test 2
Replies: 4
Views: 112

Re: Review Sessions for Test 2

There is no review session for test 2, I recommend to do homework problems to study.
by Alexis Robles 2k
Sun Feb 23, 2020 8:55 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: l vs ll
Replies: 5
Views: 35

l vs ll

What is the difference between a single line (l) vs two lines (ll) in a cell diagram? Thanks
by Alexis Robles 2k
Sun Feb 23, 2020 8:52 pm
Forum: Balancing Redox Reactions
Topic: Balancing Redox Equations
Replies: 7
Views: 65

Balancing Redox Equations

How can you tell which elements are undergoing reduction or oxidation?
by Alexis Robles 2k
Sun Feb 23, 2020 8:48 pm
Forum: Van't Hoff Equation
Topic: Van't Hoff Equation
Replies: 7
Views: 104

Re: Van't Hoff Equation

Is this equation going to be on test 2?
by Alexis Robles 2k
Sun Feb 23, 2020 8:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 10
Views: 136

Re: Test 2

Test two starts Tuesday of week 9 and covers everything after the midterm up to Electrochemistry.
by Alexis Robles 2k
Sun Feb 23, 2020 8:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Extra Credit
Replies: 17
Views: 226

Re: Extra Credit

There are no extra credit opportunities in Lavelle class.
by Alexis Robles 2k
Mon Feb 17, 2020 1:01 pm
Forum: Van't Hoff Equation
Topic: Derivation of Van't Hoff
Replies: 3
Views: 35

Re: Derivation of Van't Hoff

the two equations are
∆G°=∆H°-T∆S°
∆G°=-RTlnK.
by Alexis Robles 2k
Mon Feb 17, 2020 12:58 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm Curve
Replies: 45
Views: 504

Re: Midterm Curve

He doesn't curve the midterm but assigns grades at the end of the quarter depending on the overall class performance.
by Alexis Robles 2k
Mon Feb 17, 2020 12:56 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: G vs G knot
Replies: 15
Views: 111

Re: G vs G knot

G knot means that the elements in the equation are in their standard state.
by Alexis Robles 2k
Mon Feb 17, 2020 12:50 pm
Forum: General Science Questions
Topic: Content on Test 2
Replies: 10
Views: 120

Re: Content on Test 2

I believe it will be on stuff we learn after the midterm up to test 2
by Alexis Robles 2k
Mon Feb 10, 2020 12:16 am
Forum: Phase Changes & Related Calculations
Topic: equation for phase changes
Replies: 3
Views: 31

equation for phase changes

What was the equation for phase changes? I know it had something to do with deltaH but forgot the rest?
by Alexis Robles 2k
Sun Feb 09, 2020 11:58 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Kelvin or Celsius?
Replies: 47
Views: 963

Re: Kelvin or Celsius?

Whenever it is T alone, you should use kelvin but when it is deltaT, you can use Celcius or kelvin.
by Alexis Robles 2k
Sun Feb 09, 2020 11:50 pm
Forum: Phase Changes & Related Calculations
Topic: Phase Change Calculations
Replies: 5
Views: 50

Re: Phase Change Calculations

It will be given on the equation sheet.
by Alexis Robles 2k
Sun Feb 09, 2020 11:39 pm
Forum: Calculating Work of Expansion
Topic: q=C delta T
Replies: 5
Views: 45

q=C delta T

What is the difference between q= mCdeltaT and q=CdeltaT? when should we use the m/n in the equation?
by Alexis Robles 2k
Sun Feb 09, 2020 11:37 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy
Replies: 1
Views: 35

Gibbs Free Energy

What specifically do we need to know for the midterm? I know it is only the beginning but what equations should we know how to use? Thanks
by Alexis Robles 2k
Mon Feb 03, 2020 12:11 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: delta U
Replies: 9
Views: 78

Re: delta U

Delta u= q+w
q= heat
w=work
by Alexis Robles 2k
Mon Feb 03, 2020 12:08 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: PLF sessions
Replies: 6
Views: 86

Re: PLF sessions

You can, you just need to email them.
by Alexis Robles 2k
Mon Feb 03, 2020 12:06 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Constant pressure
Replies: 19
Views: 190

Re: Constant pressure

yeah, its Constant external pressure.
by Alexis Robles 2k
Mon Feb 03, 2020 12:04 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Standard Reaction Enthalpy
Replies: 4
Views: 25

Standard Reaction Enthalpy

What is the difference between Standard Reaction Enthalpy and Standard Enthalpy of Formation? Thanks.
by Alexis Robles 2k
Sun Feb 02, 2020 11:55 pm
Forum: Calculating Work of Expansion
Topic: Intergral
Replies: 6
Views: 74

Intergral

I'm confused about when and why we use the integral to find the area under the curve? Can somebody explain this?
by Alexis Robles 2k
Sun Jan 26, 2020 10:23 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Midterm
Replies: 8
Views: 105

Re: Midterm

The Midterm is on February 12th, Wednesday. Week 6
by Alexis Robles 2k
Sun Jan 26, 2020 10:22 pm
Forum: Phase Changes & Related Calculations
Topic: Hess's Law
Replies: 8
Views: 60

Hess's Law

What is Hess's Law?
by Alexis Robles 2k
Sun Jan 26, 2020 10:17 pm
Forum: Phase Changes & Related Calculations
Topic: delta H
Replies: 3
Views: 31

delta H

What is the difference between Standard reaction enthalpy and Standard enthalpy formation?
by Alexis Robles 2k
Sun Jan 26, 2020 10:15 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy
Replies: 3
Views: 33

Enthalpy

what makes Enthalpy a state?
by Alexis Robles 2k
Sun Jan 26, 2020 10:13 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 3 methods
Replies: 5
Views: 44

3 methods

From the three methods, why should we use a certain method over the others? Thanks
by Alexis Robles 2k
Sun Jan 19, 2020 9:41 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Conjugate Seesaw
Replies: 2
Views: 47

Conjugate Seesaw

What do we need to know about Conjugate Seesaw? I am confused about this. Thanks.
by Alexis Robles 2k
Sun Jan 19, 2020 9:31 pm
Forum: Ideal Gases
Topic: R Constant
Replies: 18
Views: 249

R Constant

What is the R constant in PV=nRT, I keep hearing there are different R constant and I am confused about that?
by Alexis Robles 2k
Sun Jan 19, 2020 9:28 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: temperature
Replies: 10
Views: 79

temperature

How does temperature affect the conditions when solving?
by Alexis Robles 2k
Sun Jan 19, 2020 9:18 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: H20 in the ICE table
Replies: 26
Views: 236

H20 in the ICE table

is H20 the only thing we leave out when doing an ICE table?
by Alexis Robles 2k
Sun Jan 19, 2020 9:13 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: 5% rule
Replies: 4
Views: 48

5% rule

What is the 5% rule and when do we apply it? Thanks.
by Alexis Robles 2k
Sun Jan 12, 2020 5:43 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K
Replies: 10
Views: 74

K

What is the difference between all the K?
by Alexis Robles 2k
Sun Jan 12, 2020 5:41 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Chatelier's Principle
Replies: 7
Views: 62

Chatelier's Principle

What is Chatelier's Principle and when do we use it?
by Alexis Robles 2k
Sun Jan 12, 2020 5:37 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q and K
Replies: 6
Views: 76

Q and K

What is the difference between Q and K?
by Alexis Robles 2k
Sun Jan 12, 2020 5:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Units for K
Replies: 21
Views: 207

Units for K

So we do not use units for K? Can someone explain this to me?
by Alexis Robles 2k
Sun Jan 12, 2020 5:33 pm
Forum: Ideal Gases
Topic: PV = nRT Confusion
Replies: 4
Views: 67

PV = nRT Confusion

When do we use PV = nRT, I am confused about what this is for? Can someone explain this? Thanks :)
by Alexis Robles 2k
Sun Jan 12, 2020 5:31 pm
Forum: General Science Questions
Topic: Test 1 [ENDORSED]
Replies: 13
Views: 180

Test 1 [ENDORSED]

When is test 1? Is it during week two discussion and if so, what topics are going to be on the test?
by Alexis Robles 2k
Fri Dec 06, 2019 3:43 pm
Forum: Naming
Topic: Naming
Replies: 2
Views: 51

Naming

For the final, do we need to write the name for coordination compounds in the New IUPAC Name Convention or is the regular/"old" one fine?
by Alexis Robles 2k
Fri Dec 06, 2019 3:38 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Weak/Strong acid
Replies: 1
Views: 37

Weak/Strong acid

I forget what Dr. Lavelle said about on which one we do not need to know how to solve. I believe he said we don't need to worry about weak acid but I'm not sure. Can someone explain what we need to know for the final?
by Alexis Robles 2k
Thu Dec 05, 2019 5:24 pm
Forum: General Science Questions
Topic: Final
Replies: 2
Views: 83

Final

So the final has 8 questions correct? So is the material on the final going to be stuff we learned after the midterm? Or is it going to be on everything?
by Alexis Robles 2k
Thu Dec 05, 2019 5:21 pm
Forum: *Titrations & Titration Calculations
Topic: Confusion
Replies: 1
Views: 102

Confusion

Can someone explain what he went over on Wednesday that is 14b material? I am confused about what exactly we need to know.
by Alexis Robles 2k
Thu Dec 05, 2019 5:17 pm
Forum: Calculating the pH of Salt Solutions
Topic: Wednesday Lecture 12/4
Replies: 4
Views: 76

Wednesday Lecture 12/4

Do we have to know the section on the slide where he divided ([h3O+][HCo3-])/([H2Co2]) to find Ka1 and he repeated it two more times to find Ka2 and Ka3? Then he ranked them Ka1>Ka2>Ka3. I just want to know if we have to know how to do this for the test?
by Alexis Robles 2k
Mon Dec 02, 2019 9:52 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 9
Views: 98

Coordination Number

The coordination number of central atom is the total number of ligands bonded to it correct?
by Alexis Robles 2k
Mon Dec 02, 2019 9:48 pm
Forum: Calculating the pH of Salt Solutions
Topic: pKa vs Ka
Replies: 6
Views: 73

pKa vs Ka

What is the difference between Pka and Ka? Thank you
by Alexis Robles 2k
Mon Dec 02, 2019 9:46 pm
Forum: Naming
Topic: Memorizing
Replies: 9
Views: 108

Memorizing

Do we have to memorize the table from the book plus more for naming compounds for the final?
by Alexis Robles 2k
Mon Dec 02, 2019 9:43 pm
Forum: General Science Questions
Topic: 50 post grade
Replies: 25
Views: 803

50 post grade

Do we have to do anything to get the 50 points for the 50 posts we made or the TA just looks at our total post?
by Alexis Robles 2k
Mon Dec 02, 2019 9:42 pm
Forum: General Science Questions
Topic: Final test locations
Replies: 4
Views: 102

Final test locations

Has Dr. Lavelle posted the final test locations and times?
by Alexis Robles 2k
Mon Nov 25, 2019 7:08 pm
Forum: Naming
Topic: Oxidation
Replies: 3
Views: 57

Oxidation

What is the equation to find the oxidation?
by Alexis Robles 2k
Mon Nov 25, 2019 7:07 pm
Forum: Naming
Topic: -ate ending
Replies: 8
Views: 97

-ate ending

When do you add the -ate ending to the naming? Thanks
by Alexis Robles 2k
Mon Nov 25, 2019 7:05 pm
Forum: Naming
Topic: Naming elements
Replies: 1
Views: 29

Naming elements

So if the element has a negative charge, we change the end to an O? for example, Cyanide to Cyano
by Alexis Robles 2k
Mon Nov 25, 2019 7:01 pm
Forum: Hybridization
Topic: Tetravalence of Carbon
Replies: 3
Views: 32

Re: Tetravalence of Carbon

In the periodic table, Carbon has 4 valence electrons and Tetravalent is having 4 valence electrons.
by Alexis Robles 2k
Mon Nov 25, 2019 6:59 pm
Forum: Hybridization
Topic: Sigma and Pi Bonds
Replies: 21
Views: 151

Re: Sigma and Pi Bonds

A single bond is always a pi bond, a double bond is one sigma and one pi bond. A triple bond is two pi bonds on the outsides and a sigma bond in the middle.
by Alexis Robles 2k
Sun Nov 17, 2019 8:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 7
Views: 74

VSEPR

We just need to know the names and not draw them for the test?
by Alexis Robles 2k
Sun Nov 17, 2019 8:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 4
Views: 58

Bond Angles

For Test 2, We don't need to know exact angles for some molecules correct? Only 90,109.5, 120, and 180?
by Alexis Robles 2k
Sun Nov 17, 2019 7:49 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Dipole Induced
Replies: 1
Views: 25

Dipole Induced

Dipole Induced is the same as London correct? and they all fall under Van der Waals?
by Alexis Robles 2k
Sat Nov 16, 2019 7:48 pm
Forum: General Science Questions
Topic: Test 2
Replies: 5
Views: 67

Test 2

What topics are going to be on Test 2?
by Alexis Robles 2k
Sun Nov 10, 2019 6:40 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: The exceptions
Replies: 6
Views: 213

The exceptions

What were the two exceptions in the electron configuration?
by Alexis Robles 2k
Sun Nov 10, 2019 6:38 pm
Forum: General Science Questions
Topic: London
Replies: 4
Views: 80

London

What is London on Dr. Lavelle slides?
by Alexis Robles 2k
Sun Nov 10, 2019 6:35 pm
Forum: Lewis Structures
Topic: Electronegative
Replies: 14
Views: 146

Re: Electronegative

the definition for electronegativity is "the tendency of an atom to attract a shared pair of electrons towards itself". So, yes the higher the electronegativity in elements are more likely to get electrons.
by Alexis Robles 2k
Sun Nov 10, 2019 6:26 pm
Forum: Dipole Moments
Topic: Boiling Point
Replies: 11
Views: 136

Re: Boiling Point

The higher the boiling point means the more energy is needed to break the intermolecular forces.
by Alexis Robles 2k
Sun Nov 10, 2019 6:21 pm
Forum: General Science Questions
Topic: Test 2
Replies: 20
Views: 252

Re: Test 2

Test 2 will cover material after the midterm and will be during week 8 in your discussion.
by Alexis Robles 2k
Sun Nov 03, 2019 8:49 pm
Forum: *Black Body Radiation
Topic: Midterm
Replies: 13
Views: 187

Midterm

Is black body radiation going to be on the midterm? If so, what do we exactly need to know?
by Alexis Robles 2k
Sun Nov 03, 2019 8:48 pm
Forum: Lewis Structures
Topic: Octet Rule
Replies: 6
Views: 76

Octet Rule

Can someone explain the octet rule? Thank you.
by Alexis Robles 2k
Sun Nov 03, 2019 8:44 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: f-block
Replies: 2
Views: 46

f-block

For the midterm, we do not have to worry about the f-block correct?
by Alexis Robles 2k
Sun Nov 03, 2019 8:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration for cations
Replies: 3
Views: 62

Electron Configuration for cations

So we remove the electrons from the highest level block in the normal element configuration?
by Alexis Robles 2k
Sun Nov 03, 2019 8:40 pm
Forum: Lewis Structures
Topic: Lewis Structure
Replies: 3
Views: 50

Lewis Structure

Do we choose the one with the lowest electronegativity and ionization for the center?
by Alexis Robles 2k
Sat Oct 26, 2019 10:37 pm
Forum: General Science Questions
Topic: Week 5 homework
Replies: 2
Views: 44

Week 5 homework

For week five homework, do we start the "Chemical bonds" list or can we still work on the "The Quantum World" list?
by Alexis Robles 2k
Sat Oct 26, 2019 10:34 pm
Forum: Trends in The Periodic Table
Topic: atomic Radii
Replies: 11
Views: 126

atomic Radii

Atomic Radii is basically ranked by electrons. So the more electron, the higher the atomic radii?
by Alexis Robles 2k
Sat Oct 26, 2019 10:25 pm
Forum: Quantum Numbers and The H-Atom
Topic: Ms and ML
Replies: 6
Views: 150

Ms and ML

Is Ml always -1/2 or 1/2 on the specific electron? For Ms, what does it mean -L to L
by Alexis Robles 2k
Sat Oct 26, 2019 10:14 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Shorthand Notation
Replies: 4
Views: 67

Shorthand Notation

For the midterm and future test, do you think we can write the electron configuration in the shorthand notation or do we have to write the whole thing?
by Alexis Robles 2k
Sat Oct 26, 2019 10:08 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Block Confusion
Replies: 4
Views: 62

Block Confusion

Can someone explain to me why 4s is lower energy level than 3d when there is only one electron on 4s.
by Alexis Robles 2k
Sun Oct 20, 2019 9:20 pm
Forum: General Science Questions
Topic: Equation Help
Replies: 2
Views: 44

Equation Help

What is the full equation and its name that has "((hr/n^2)-(hr/n^2))?
by Alexis Robles 2k
Sun Oct 20, 2019 9:12 pm
Forum: Quantum Numbers and The H-Atom
Topic: Schrodinger's wave function
Replies: 3
Views: 69

Schrodinger's wave function

What did Dr. Lavelle mean when he said use "sin and cos" function in this slides
by Alexis Robles 2k
Sun Oct 20, 2019 9:10 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Number
Replies: 4
Views: 64

Quantum Number

Do we have to memorize the shell, subshells, and orbitals?
by Alexis Robles 2k
Sun Oct 20, 2019 9:08 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Number
Replies: 3
Views: 44

Quantum Number

What does the Quantum Number tell us? What is it used for?
by Alexis Robles 2k
Sun Oct 20, 2019 9:08 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Number
Replies: 4
Views: 69

Quantum Number

which equation do we use to find the Quantum Number?
by Alexis Robles 2k
Sun Oct 13, 2019 10:24 pm
Forum: General Science Questions
Topic: oxygen molar mass
Replies: 2
Views: 54

oxygen molar mass

So in the periodic table, Oxygen molar mass is 15.999 but do we always just round it up to 16? or do we use 15.999 in certain problems?
by Alexis Robles 2k
Sun Oct 13, 2019 10:20 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: #1D.21
Replies: 2
Views: 43

#1D.21

Can someone help me with how to solve this one?

Write the subshell notation (3d, for instance) and the number of orbitals having the following quantum numbers: (a) n=5,l=2;(b) n=1,l=0;(c) n=6,l=3;(d) n=2,l=1."
by Alexis Robles 2k
Sun Oct 13, 2019 10:16 pm
Forum: General Science Questions
Topic: Powerpoint Slides
Replies: 4
Views: 95

Powerpoint Slides

Does Dr. Lavelle post his slides online in his website? Or is there a way to view them after the lecture?
by Alexis Robles 2k
Sun Oct 13, 2019 10:14 pm
Forum: Photoelectric Effect
Topic: Confusion on equations
Replies: 9
Views: 207

Confusion on equations

I was wondering when do we each equation? Do each equation solve for something different. I know they all are switched around but I'm just confused about which ones to use for certain questions?

E=hv
lambda*v=c
E=h*(c/lambda)
lambda=(hc/E)
by Alexis Robles 2k
Sun Oct 13, 2019 10:05 pm
Forum: Properties of Light
Topic: De Broglie equation
Replies: 4
Views: 72

De Broglie equation

I was just wondering when do we use De Broglie equation? thanks
by Alexis Robles 2k
Sun Oct 06, 2019 6:51 pm
Forum: General Science Questions
Topic: Molar Mass
Replies: 1
Views: 46

Molar Mass

So we get the molar mass from the periodic table Dr. Lavelle will give to us?
by Alexis Robles 2k
Sun Oct 06, 2019 6:47 pm
Forum: General Science Questions
Topic: temperature
Replies: 4
Views: 110

temperature

What was the conversion from kelvin to Fahrenheit? I know it is a simple equation but didn't have time to write it down.
by Alexis Robles 2k
Sun Oct 06, 2019 6:42 pm
Forum: General Science Questions
Topic: Molar Mass
Replies: 1
Views: 46

Molar Mass

I just wanted to make sure, is molar mass and atomic mass on the periodic table are the same.
by Alexis Robles 2k
Sun Oct 06, 2019 6:38 pm
Forum: Significant Figures
Topic: Sig Fig
Replies: 1
Views: 46

Sig Fig

How do you know how many numbers to put in the final answer? Can someone explain this to me? Thank You
by Alexis Robles 2k
Sun Oct 06, 2019 6:01 pm
Forum: Significant Figures
Topic: Homework
Replies: 4
Views: 84

Homework

What does Dr. Lavelle mean when he said: "submit homework on recently covered material." I thought we turn it in during discussion.

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