## Search found 100 matches

Sat Mar 14, 2020 6:58 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Electrolysis
Replies: 6
Views: 94

### Electrolysis

Would we need to know electrolysis for the final?
Sat Mar 14, 2020 6:57 pm
Forum: Van't Hoff Equation
Topic: Van't Hoff Equation
Replies: 6
Views: 102

### Re: Van't Hoff Equation

I think the main way we use this equation is to find the new equilibrium constant based on a change in temperature
Sat Mar 14, 2020 6:53 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: negative sign
Replies: 6
Views: 123

### Re: negative sign

I think it's to show that energy is release or loss
Sat Mar 14, 2020 6:52 pm
Forum: Van't Hoff Equation
Topic: ln
Replies: 9
Views: 131

### Re: ln

You raise e by both sides of the equation
Sat Mar 14, 2020 6:44 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: intensive vs extensive
Replies: 7
Views: 163

### Re: intensive vs extensive

Extensive depends on the amount while intensive doesn't. It's important because it tells us which constant or which equation to use like specific heat capacity vs heat capacity, etc.
Sat Mar 14, 2020 6:39 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: K
Replies: 2
Views: 63

### Re: K

It symbolizes the equilibrium constant of the reaction
Sat Mar 14, 2020 6:36 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Internal Energy
Replies: 6
Views: 180

### Re: Internal Energy

Can anyone please explain to me why when it is an isothermal reversible expansion, we can assume that internal energy is 0 and q = -w? Thank you Isothermal means the temperature is constant and so the internal energy doesn't change so the change is 0. If change in internal energy is 0 then 0 = q + ...
Sat Mar 14, 2020 6:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 282
Views: 134928

### Re: Saying Thank You to Dr. Lavelle

THANK YOU SO MUCH DR. LAVELLE!!!!!!
Sat Mar 14, 2020 6:31 pm
Forum: Balancing Redox Reactions
Topic: Pt in Cell Diagram
Replies: 10
Views: 170

### Re: Pt in Cell Diagram

I think it is used when there's no solid that was explicitly said in the problem.
Sat Mar 14, 2020 5:25 pm
Forum: Administrative Questions and Class Announcements
Replies: 14
Views: 290

I think he curves up depending on the class average at the end of the quarter
Sat Mar 14, 2020 5:19 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Test 2 Concentration Cell
Replies: 3
Views: 33

### Re: Test 2 Concentration Cell

As well as doubling the mass of the cathode electrode will it increase or decrease the cell potential
Sat Mar 14, 2020 5:17 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Test 2 Concentration Cell
Replies: 3
Views: 33

### Re: Test 2 Concentration Cell

Also, if water is added in the cathode solution would the cell potential increase or decrease?
Sat Mar 14, 2020 5:15 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Test 2 Concentration Cell
Replies: 3
Views: 33

### Test 2 Concentration Cell

A concentration cell was constructed with two electrodes containing ZnSO4 (aq) at 25 degrees C. The cathode concentration is 3.0M and the cell potential 0.0866V/
Calculate the concentration of the anode solution

Is LnQ going to be the anode concentration over cathode or cathode over anode?
Sat Mar 14, 2020 3:28 pm
Forum: Van't Hoff Equation
Topic: Test 2 Calculate K after a temperature change
Replies: 1
Views: 69

### Test 2 Calculate K after a temperature change

Given that delta H reaction = 161 kJ/mol and K = 8.43 x 10^-12 for the reaction at 25 degrees C. Calculate K at 125 degrees C. Assume that delta H reaction and delta S reaction remain constant over this temperature range.

Idk what I did because somehow I ended up with a new K value of 6.808 x 10^-96
Sat Mar 14, 2020 3:10 pm
Forum: Van't Hoff Equation
Topic: what does it do?
Replies: 13
Views: 253

### Re: what does it do?

Van't Hoff Equation is used to calculate the new equilibrium constant based on temperature change
Sat Mar 14, 2020 3:04 pm
Forum: Balancing Redox Reactions
Topic: Redox Reaction in a Basic Solution
Replies: 3
Views: 116

### Redox Reaction in a Basic Solution

SeO4 2- (aq) + Au (s) = Au 3+ (aq) + SeO3 2- (aq)

I was confused with the reduction half-reaction
I thought it would be 2e- + SeO4 2- + H+ = SeO3 2- + OH-

Im assuming Im wrong since I put H+ was I supposed to put H2O instead?
Sat Mar 14, 2020 2:48 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 6
Views: 117

### Re: Nernst Equation

Also what R are we using?
Sat Mar 14, 2020 2:47 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 6
Views: 117

### Nernst Equation

Do we need to convert RT/nF * lnQ into 0.0592/n log Q?

Because I decided not to convert during one of the problems on the test as I forgot the conversion rate and I got the wrong answer even when I think my calculations were right. So is it necessary to use this conversion?
Sat Mar 14, 2020 2:40 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Calculating E cell at room temperature
Replies: 1
Views: 36

### Calculating E cell at room temperature

2Ag+ (aq, 0.10M) + Cu (s) = 2Ag (s) + Cu 2+ (aq, 0.20M) Standard E cell is 0.460V

Can someone solve this pls.
Sat Mar 14, 2020 2:05 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Test 2 on Standard Cell Potential
Replies: 6
Views: 44

### Re: Test 2 on Standard Cell Potential

Oops the Lithium half-reaction has standard E = -3.040V
Sat Mar 14, 2020 9:04 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Test 2 on Standard Cell Potential
Replies: 6
Views: 44

### Re: Test 2 on Standard Cell Potential

Also I need to find the standard Gibbs Free Energy, do I just use -nFE(standard)?
Sat Mar 14, 2020 9:03 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Test 2 on Standard Cell Potential
Replies: 6
Views: 44

### Test 2 on Standard Cell Potential

The half-reactions are
Ce 4+ (aq) + e- = Ce 3+ (aq) Standard E = 1.44V
Li+ (aq) + e- = Li (s)

How do I know which one is the cathode and which one is the anode for me to use standard E cell = standard E cathode - standard E anode????
Sat Mar 14, 2020 8:53 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram
Replies: 11
Views: 143

### Cell Diagram

In a cell diagram, do we always use Platinum if nothing else is stated to be used?
Sat Mar 14, 2020 8:50 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Concentration Cell
Replies: 3
Views: 30

### Concentration Cell

So in a concentration cell, is the anode always the one with the lower concentration?
Sat Mar 14, 2020 8:33 am
Forum: Student Social/Study Group
Topic: thoughtful poetry time + lavelle appreciation
Replies: 6
Views: 166

### Re: thoughtful poetry time + lavelle appreciation

This is very beautiful. Thank you so much Lavelle for everything you've done and continue to do for your students :)
Sat Mar 14, 2020 8:31 am
Forum: Student Social/Study Group
Topic: Curve?
Replies: 31
Views: 1408

### Re: Curve?

I think it's either/or. If you end up with a C you pass or if you end up with 250 points you pass the class. Last quarter I had 444/500 points and ended with an A- so he does kind of curve but we won't know until they find the average points out of 500 of the class
Sat Mar 14, 2020 8:28 am
Forum: Student Social/Study Group
Topic: Week 10 Review Question
Replies: 5
Views: 153

### Re: Week 10 Review Question

Using the stoichiometric ratios and creating an ice table you should be able to calculate the molar concentrations
Sat Mar 14, 2020 8:26 am
Forum: Student Social/Study Group
Topic: Coronavirus Joke
Replies: 14
Views: 749

### Re: Coronavirus Joke

Thank you for trying to lighten up the mood
Sat Mar 14, 2020 8:26 am
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 8
Views: 221

### Re: Tips for Staying Focused

To stay focus I usually take a couple of breaths and try my best to only think about the task at hand and ignore my surroundings
Fri Mar 13, 2020 1:49 am
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 12
Views: 234

### Re: Final

His latest update still didn't tell us how we are turning in the final
Thu Mar 12, 2020 12:17 pm
Forum: Ideal Gases
Topic: Acids and Basis: Salts
Replies: 9
Views: 120

### Re: Acids and Basis: Salts

Use an ice table and any available information like the pKa or pKb as well as any equilibrium constants would be needed to solve such a problem
Thu Mar 12, 2020 12:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Take Home Final
Replies: 16
Views: 275

### Re: Take Home Final

I heard some people's take-home final is taken over a large window of time to accommodate for everyone but the tests are still designed to take the same amount of time. The only difference is to scan and upload our answers I guess. I hope we get an update soon
Thu Mar 12, 2020 12:11 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 22
Views: 569

### Re: Final Exam

How are you guys going to be studying for the final I'm planning to look over the study guide Dr. Lavelle sent out, do the endgame worksheet Lyndon posted, and review my notes/ do practice hw problems. Also some UAs released another set of practice problems! https://lavelle.chem.ucla.edu/forum/view...
Wed Mar 11, 2020 9:46 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 22
Views: 569

### Re: Final Exam

How are you guys going to be studying for the final
Wed Mar 11, 2020 9:44 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 12
Views: 234

### Final

How will we turn in the final??
Wed Mar 11, 2020 9:43 pm
Forum: Administrative Questions and Class Announcements
Topic: final
Replies: 14
Views: 215

### Re: final

His latest email said that it'll be a take-home final now and he'll post the test on the website
Wed Mar 11, 2020 9:39 pm
Forum: Administrative Questions and Class Announcements
Topic: ENDGAME Review Session
Replies: 71
Views: 2761

### Re: ENDGAME Review Session

When are the answers going to be posted?
Tue Mar 10, 2020 9:39 pm
Forum: Administrative Questions and Class Announcements
Topic: ENDGAME Review Session
Replies: 71
Views: 2761

### Re: ENDGAME Review Session

Are we still going to have a review session on Friday?
Tue Mar 10, 2020 12:37 pm
Forum: Balancing Redox Reactions
Topic: Half Reactions
Replies: 15
Views: 133

### Half Reactions

Whenever we balance the half-reactions, how do we know whether we need to add an H+, OH-, and/or H2O on what side of the reduction or oxidation half-reaction?
Tue Mar 10, 2020 12:31 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Concentration cell textbook question 6N. 3A self test [ENDORSED]
Replies: 4
Views: 39887

### Re: Concentration cell textbook question 6N. 3A self test[ENDORSED]

So in a concentration cell, is the anode always the one with the lower concentration?
Tue Mar 10, 2020 12:28 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Boltzmann Equation
Replies: 2
Views: 73

### Boltzmann Equation

I'm confused about the relationship between Boltzmann's constant and the gas constant.
Mon Mar 09, 2020 10:37 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible vs Irreversible
Replies: 3
Views: 84

### Re: Reversible vs Irreversible

Then explain the graph of pressure vs volume of the reversible and irreversible expansion?
Mon Mar 09, 2020 7:15 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible vs Irreversible
Replies: 3
Views: 84

### Reversible vs Irreversible

What is the difference between isothermal reversible expansion vs irreversible expansion?
Mon Mar 09, 2020 7:13 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating K
Replies: 6
Views: 57

### Re: Calculating K

How does sig figs factor in calculating K then?
Mon Mar 09, 2020 5:12 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: S = 0
Replies: 18
Views: 279

### Re: S = 0

The total change in entropy is 0 if the system is isothermal and reversible expansion. The entropy change of the surrounding is 0 if the system is isothermal and irreversible expansion.
Mon Mar 09, 2020 5:04 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: ΔS of Phase Changes
Replies: 5
Views: 140

### Re: ΔS of Phase Changes

We calculate the last step because the change of entropy is a state function and we only care about the initial and final state of the reaction. In this case, we want the entropy change of the water evaporating at 85 degrees so we need the water to heat up and change phase and then bring the temp of...
Mon Mar 09, 2020 4:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating concentrations at equilibrium
Replies: 4
Views: 140

### Calculating concentrations at equilibrium

One mole of COBr2 was injected in a 1L flask at a certain temperature. The equilibrium mixture was then analyzed and found to contain 0.304 moles of CO.
Calculate the concentration of each species at equilibrium.
Mon Mar 09, 2020 11:35 am
Forum: Ideal Gases
Topic: Partial Pressure
Replies: 13
Views: 142

### Partial Pressure

2NO + O2 = 2NO2

Why would decreasing the volume of a system increase the partial pressure of NO2?
Mon Mar 09, 2020 11:17 am
Forum: Ideal Gases
Topic: PV=nRT
Replies: 12
Views: 161

### Re: PV=nRT

Pressure times Volume = moles of gas times the gas constant times the temperature
Mon Mar 09, 2020 11:15 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating K
Replies: 6
Views: 57

### Calculating K

When calculating K, why are there no units
Sun Dec 08, 2019 10:33 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Nitro vs Nitrito
Replies: 6
Views: 179

### Re: Nitro vs Nitrito

It would either underline N or O or it'll be written as NO2 or ONO (and the first element is the one that's bonded)
Sun Dec 08, 2019 10:28 pm
Forum: Naming
Topic: NH4[PtCl3(NH3)]
Replies: 5
Views: 140

### Re: NH4[PtCl3(NH3)]

It is platinate because the compound is an anion
Sun Dec 08, 2019 10:26 pm
Forum: Naming
Topic: Polydentate
Replies: 2
Views: 104

### Re: Polydentate

How can you tell a ligand is a polydentate? And what are examples of anionic ligands, how are they different from anions? A ligand is polydentate if it binds to the metal in two or more places, because it has two or more lone electron pairs. For example EDTA is a polydentate. They are different beca...
Sun Dec 08, 2019 10:22 pm
Forum: Naming
Topic: [Fe(OH)(OH2)5]Cl2
Replies: 3
Views: 116

### Re: [Fe(OH)(OH2)5]Cl2

So the name for [Fe(OH)(OH2)5]Cl2 is pentaaquahydroxidoiron(III) chloride. But how did they get the charge on iron? And why is it chloride if there are two chloride, shouldn't it be dichloride? Since there is two chlorine it has a -2 charge so the coordination compound has an overall 2+ charge (Also...
Sun Dec 08, 2019 10:19 pm
Forum: Naming
Topic: -ate
Replies: 10
Views: 232

### Re: -ate

Only if the metal coordination compound is an anion
Sun Dec 08, 2019 10:19 pm
Forum: Naming
Topic: Types of Compounds
Replies: 2
Views: 100

### Re: Types of Compounds

Based on their electronegativity, i believe
Sun Dec 08, 2019 10:18 pm
Forum: Naming
Topic: type of compound
Replies: 2
Views: 106

### Re: type of compound

amphoteric metal oxide
Sun Dec 08, 2019 10:17 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Stronger acid?
Replies: 10
Views: 522

### Re: Stronger acid?

Which would be the stronger acid HClO or HClO2? I know that you first look at bond length and then anion strength but how would you figure this one out?

HClO2 is stronger because of how there's more oxygen and a higher electron pulling ability, which delocalizes the electron
Sun Dec 08, 2019 10:15 pm
Forum: Calculating the pH of Salt Solutions
Topic: OH- and H+
Replies: 6
Views: 181

### OH- and H+

How do you know if the solution will result in OH or H
Sun Dec 08, 2019 10:14 pm
Forum: Calculating the pH of Salt Solutions
Topic: pH
Replies: 6
Views: 153

### pH

How is the pH of a solution is related to its hydronium ion and hydroxide ion concentrations?
Sun Dec 08, 2019 10:11 pm
Forum: Air Pollution & Acid Rain
Topic: Carbon dioxide
Replies: 1
Views: 98

### Carbon dioxide

how can carbon dioxide lead to respiratory acidosis?
Sun Dec 01, 2019 10:05 pm
Forum: Naming
Topic: Ligand Names
Replies: 1
Views: 37

### Ligand Names

Do we need to know ligand names for the final
Sun Dec 01, 2019 9:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sigma Bond
Replies: 10
Views: 117

### Re: Sigma Bond

Yep always
Sun Dec 01, 2019 9:55 pm
Forum: Naming
Topic: Bis, Tris, Tetrakis, Pentakis
Replies: 3
Views: 73

### Bis, Tris, Tetrakis, Pentakis

I am confused on how to use Bis, Tris, Tetrakis, Pentakis
Sun Dec 01, 2019 9:48 pm
Forum: Naming
Topic: Chelating
Replies: 6
Views: 102

### Chelating

What is chelating?
Sun Nov 24, 2019 8:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Hydrogen Bonding
Replies: 13
Views: 161

### Re: Hydrogen Bonding

It happens with polar molecules with N, O, F, elements that have lone pairs that attract Hydrogen
Sun Nov 24, 2019 8:46 pm
Forum: Naming
Topic: Oxidation
Replies: 14
Views: 200

### Oxidation

What's an oxidation number
Sun Nov 24, 2019 8:45 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand
Replies: 10
Views: 118

### Ligand

What is a ligand?
Sun Nov 24, 2019 8:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: T-Shape
Replies: 5
Views: 104

### T-Shape

So I was wondering why for T shape the two electron pairs are like right next to each other in the trigonal planar part of the trigonal bipyramidal
Sun Nov 24, 2019 8:42 pm
Forum: Hybridization
Topic: H
Replies: 3
Views: 48

### H

I missed the lecture can someone summarize what hybridization is
Sun Nov 10, 2019 4:14 pm
Forum: Dipole Moments
Topic: What's a dipole
Replies: 4
Views: 45

### What's a dipole

What's a dipole
Sun Nov 10, 2019 4:02 pm
Forum: Lewis Structures
Topic: Electronegative
Replies: 14
Views: 155

### Electronegative

So the more electronegative elements are more likely to get the electron?
Sun Nov 10, 2019 3:41 pm
Forum: Octet Exceptions
Topic: Elements like Xenon
Replies: 1
Views: 53

### Elements like Xenon

Elements like Xenon can have 12 electrons. Is 12 the max or what for elements with octet exceptions.
Sun Nov 10, 2019 3:38 pm
Forum: Lewis Structures
Topic: Exceptions like Xenon
Replies: 3
Views: 47

### Exceptions like Xenon

Are there other elements that can have 12 electrons like Xenon?
Sun Nov 10, 2019 3:37 pm
Forum: Lewis Structures
Topic: Xenon
Replies: 4
Views: 92

### Xenon

How come Xenon can have 12 electrons
Sun Nov 03, 2019 10:08 pm
Forum: Trends in The Periodic Table
Topic: Electron Configuration Rules
Replies: 4
Views: 66

### Re: Electron Configuration Rules

Hund's Rule states that each suborbital will be filled with electrons of parallel spins
Pauli's Exclusion Principle states that you can't have the same spin for paired electrons
Sun Nov 03, 2019 9:56 pm
Forum: Trends in The Periodic Table
Topic: Ionization
Replies: 5
Views: 290

### Ionization

Why does oxygen have lower ionization energy compared to nitrogen
Sun Nov 03, 2019 9:50 pm
Forum: Trends in The Periodic Table
Topic: Ionization energy and Electron affinity
Replies: 1
Views: 48

### Ionization energy and Electron affinity

I'm confused about the difference between the two
Sun Nov 03, 2019 9:44 pm
Forum: Dipole Moments
Topic: Dipole
Replies: 1
Views: 37

### Dipole

What's a dipole?
Sun Nov 03, 2019 9:41 pm
Forum: Octet Exceptions
Topic: Uhhh
Replies: 3
Views: 69

### Uhhh

What are the octet exceptions?
Sun Oct 27, 2019 6:33 pm
Forum: Electronegativity
Topic: Electronegativity in Covalent Bonds
Replies: 3
Views: 45

### Re: Electronegativity in Covalent Bonds

I believe it's only for covalent bonds
Sun Oct 27, 2019 6:31 pm
Forum: Ionic & Covalent Bonds
Topic: Charges
Replies: 4
Views: 62

### Charges

Wait I dont understand how a molecule like SO4 has a negative charge or NH4 with a positive charge
Sun Oct 27, 2019 6:27 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Module Question
Replies: 1
Views: 36

### Re: Module Question

Multiply 60W with 1s to convert it to Joules
Now use the speed of light equation and energy equation to get Energy = planks constant times speed of light over the wavelength. You will get the energy per photons
Then you divide the energy emitted with the energy per photon to get the number of photons
Sun Oct 27, 2019 6:07 pm
Forum: Quantum Numbers and The H-Atom
Topic: 1.1
Replies: 1
Views: 44

### 1.1

1.1 Lines in the Balmer series of the hydrogen spectrum are observed at 656.3, 486.1, 434.0, and 410.2 nm. What is the wavelength of the next line in the series?
Sun Oct 27, 2019 6:03 pm
Forum: Resonance Structures
Topic: Ideal Lewis Structure
Replies: 4
Views: 61

### Re: Ideal Lewis Structure

You calculate by finding the formal charge, the more atoms with 0 formal charge the better. We also have to consider the electronegativity of the element
Sun Oct 20, 2019 10:17 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg In 1 Dimension
Replies: 2
Views: 47

### Re: Heisenberg In 1 Dimension

I think it is safe to assume that it will be used in one dimension
Sun Oct 20, 2019 10:09 pm
Forum: Properties of Light
Topic: 1F.19
Replies: 5
Views: 63

### Re: 1F.19

s-block metals have lower ionization energies compared so they tend to form cations since they are more willing to give electrons away, so they are more reactive.
Sun Oct 20, 2019 9:58 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: How to use it
Replies: 5
Views: 87

### How to use it

When do we use this equation for?
Sun Oct 20, 2019 9:54 pm
Forum: Quantum Numbers and The H-Atom
Topic: Magnetic Quantum Number
Replies: 5
Views: 74

### Magnetic Quantum Number

I know how to get the third quantum number but like what does this number tell us about the electron?
Sun Oct 20, 2019 9:49 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: The equation
Replies: 2
Views: 56

### The equation

Where did the 4pi come from
Sun Oct 13, 2019 11:27 pm
Forum: Properties of Light
Topic: Energy Equation
Replies: 3
Views: 36

### Re: Energy Equation

Plancks Constant my guy
Sun Oct 13, 2019 11:19 pm
Forum: Properties of Light
Topic: Rydberg's Equation
Replies: 1
Views: 31

### Rydberg's Equation

When is Rydberg's equation used?
Sun Oct 13, 2019 11:18 pm
Forum: Properties of Light
Topic: Photons
Replies: 3
Views: 60

### Photons

Do photons have mass?
Sun Oct 13, 2019 11:17 pm
Forum: Properties of Electrons
Topic: Electron standing wave
Replies: 2
Views: 28

### Electron standing wave

What was the standing wave animation/picture that was shown in class
Sun Oct 13, 2019 11:00 pm
Forum: DeBroglie Equation
Topic: DeBroglie's Equation
Replies: 1
Views: 56

### DeBroglie's Equation

How come this wave equation can't be applies to light since light is massless but the equation was derived from the speed of light equation C= wavelength times frequency.
Fri Oct 04, 2019 12:05 am
Forum: SI Units, Unit Conversions
Topic: Bond Length
Replies: 5
Views: 101

### Bond Length

Whats the length of a bond?
Fri Oct 04, 2019 12:01 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Determining Molar Mass
Replies: 19
Views: 170

### Re: Determining Molar Mass

It should be fine
Thu Oct 03, 2019 11:57 pm
Forum: Molarity, Solutions, Dilutions
Topic: G 13
Replies: 3
Views: 191

### G 13

To prepare a fertilizer solution, a florist dilutes 1L of 2M NH4NO3 by adding 3L of Water. The florist then adds 100mL of the diluted solution to each plant. How many moles of nitrogen atoms will each plant receive?
Thu Oct 03, 2019 11:49 pm
Forum: Balancing Chemical Reactions
Topic: H11
Replies: 3
Views: 96

### H11

Help balance equation pls

Fe2O3 + CO = Fe3O4 + CO2

and

Fe3O4 + CO = Fe + CO2
Thu Oct 03, 2019 11:45 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant
Replies: 2
Views: 66

### Limiting Reactant

Help cant solve
5g of KMnO4 is dissolved in 150mL. If 20mL of the solution is removed and placed in a 250mL what is the concentration?