Search found 98 matches

by Celine 1F
Sun Feb 16, 2020 2:13 am
Forum: Ideal Gases
Topic: pv=nrt
Replies: 18
Views: 51

Re: pv=nrt

Yes you can use it at STP
by Celine 1F
Sun Feb 16, 2020 2:11 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: adiabatic
Replies: 18
Views: 54

Re: adiabatic

An adiabatic reaction is one where there is no heat transfer
by Celine 1F
Sun Feb 16, 2020 2:09 am
Forum: General Science Questions
Topic: 50 post grade
Replies: 25
Views: 335

Re: 50 post grade

I think it depends on the TA but as long as you do five posts a week it should be okay
by Celine 1F
Sun Feb 16, 2020 2:08 am
Forum: Administrative Questions and Class Announcements
Topic: grading curve
Replies: 10
Views: 61

Re: grading curve

He doesn't curve tests but at the end of the quarter, he adjusts the overall class grades
by Celine 1F
Sun Feb 09, 2020 6:38 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Textbook question 4B.9
Replies: 4
Views: 22

Re: Textbook question 4B.9

In adiabatic processes, there is no heat transfer, so q is = to 0.
by Celine 1F
Sun Feb 09, 2020 6:34 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law
Replies: 10
Views: 32

Re: Hess's Law

Enthalpy is a state function which means their enthalpy values could be added/subtracted together
by Celine 1F
Sun Feb 09, 2020 6:33 pm
Forum: Phase Changes & Related Calculations
Topic: relationship between heat capacity and heating curve
Replies: 6
Views: 18

Re: relationship between heat capacity and heating curve

On the heating curve, the x axis has q and the y axis has temperature. If the graph has a steep slope, this means there is a small increase in q and a bigger increase in temperature, which means the substance has a low heat capacity.
by Celine 1F
Fri Feb 07, 2020 1:32 pm
Forum: Calculating Work of Expansion
Topic: Difference in Wirr and Wrev
Replies: 4
Views: 15

Re: Difference in Wirr and Wrev

Irreversible processes are done under pressure that remains constant whereas reversible processes aren't. Gases have to do more work when pressure is not constant, which is why reversible processes do more work.
by Celine 1F
Fri Feb 07, 2020 1:22 pm
Forum: Calculating Work of Expansion
Topic: Isothermal
Replies: 17
Views: 70

Re: Isothermal

If the expansion of the gas is isothermal, then this means the temperature remains constant and delta U = 0
by Celine 1F
Fri Feb 07, 2020 1:20 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: ∆U and ∆H
Replies: 6
Views: 37

Re: ∆U and ∆H

Delta H indicates the change in enthalpy while Delta U indicates change in internal energy of the system. Delta U = Delta H + work
by Celine 1F
Sun Feb 02, 2020 3:08 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Definition of First Law
Replies: 9
Views: 17

Re: Definition of First Law

The first law of thermodynamics discusses conservation of energy. Energy can't be created nor destroyed.
by Celine 1F
Sun Feb 02, 2020 3:06 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Affect of temperature on entropy?
Replies: 5
Views: 22

Re: Affect of temperature on entropy?

Increasing the temperature would lead to an increase in entropy of the system
by Celine 1F
Sun Feb 02, 2020 3:01 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: hess's law
Replies: 13
Views: 35

Re: hess's law

Molecules can only be cancelled if they are on opposite sides of the equation
by Celine 1F
Sun Feb 02, 2020 3:00 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Phase change
Replies: 20
Views: 47

Re: Phase change

In this case, delta H is positive
by Celine 1F
Sun Feb 02, 2020 2:59 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Standard Enthalpy of Formation
Replies: 4
Views: 11

Re: Standard Enthalpy of Formation

They will most likely be provided for the midterm
by Celine 1F
Thu Jan 23, 2020 10:23 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ice table
Replies: 13
Views: 40

Re: ice table

No solids and liquids are not included in the ICE table because they don't experience changes in concentration
by Celine 1F
Thu Jan 23, 2020 10:22 am
Forum: Administrative Questions and Class Announcements
Topic: Best Way To Study?
Replies: 13
Views: 58

Re: Best Way To Study?

Going to UA sessions help out a lot! Doing the assigned book problems ahead of time can help with the tests too.
by Celine 1F
Thu Jan 23, 2020 10:20 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: suggestions
Replies: 16
Views: 64

Re: suggestions

Khan Academy definitely helps me the most!
by Celine 1F
Thu Jan 23, 2020 10:19 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Acids and Bases pka and pkb
Replies: 8
Views: 33

Re: Acids and Bases pka and pkb

The lower the pKa, the stronger the acid. The lower the pKb, the stronger the base!
by Celine 1F
Thu Jan 23, 2020 10:18 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: X was ignored
Replies: 27
Views: 81

Re: X was ignored

The X can be ignored because it is so small and wouldn't cause a change in concentration
by Celine 1F
Thu Jan 23, 2020 10:16 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le chatelier and Temperature
Replies: 9
Views: 41

Re: Le chatelier and Temperature

If delta H is positive and heat is added, then the equilibrium will shift to the products side. If delta H is negative and heat is added, then equilibrium will shift to the reactants
by Celine 1F
Mon Jan 20, 2020 4:32 pm
Forum: Student Social/Study Group
Topic: Test 1
Replies: 9
Views: 61

Re: Test 1

He normally does not post a practice test before.
by Celine 1F
Wed Jan 15, 2020 2:49 pm
Forum: Ideal Gases
Topic: Ideal Gas Law
Replies: 5
Views: 31

Ideal Gas Law

When are we supposed to use the Ideal Gas Law
by Celine 1F
Tue Jan 14, 2020 9:33 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Units for K
Replies: 21
Views: 57

Re: Units for K

K, a constant, demonstrates the ratio of products and reactants so it does not have units
by Celine 1F
Tue Jan 14, 2020 9:32 am
Forum: Administrative Questions and Class Announcements
Topic: Grading
Replies: 8
Views: 65

Re: Grading

The TAs check to make sure we make at least 5 posts each week. They only check to see that you've done 5, so any extra questions don't count as extra credit.
by Celine 1F
Tue Jan 14, 2020 9:30 am
Forum: Administrative Questions and Class Announcements
Topic: Are Lectures Bruincasted?
Replies: 10
Views: 60

Re: Are Lectures Bruincasted?

His lectures are not bruincasted unfortunately. You could always ask someone to send you a picture of the slides!
by Celine 1F
Tue Jan 14, 2020 9:28 am
Forum: Administrative Questions and Class Announcements
Topic: Discussion
Replies: 8
Views: 45

Re: Discussion

I don't think it is but the homework turned in during discussion is graded.
by Celine 1F
Tue Jan 14, 2020 9:20 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kw and H3O/OH concentrations
Replies: 5
Views: 15

Re: Kw and H3O/OH concentrations

When the pH of a solution is 7, that's when the concentrations of H3O and H+ are equal to one another.
by Celine 1F
Tue Jan 14, 2020 9:17 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: equilibrium constants and inputs
Replies: 4
Views: 23

Re: equilibrium constants and inputs

Solids don't have a concentration and liquids are considered pure substances and their concentration does not change
by Celine 1F
Sat Jan 11, 2020 5:29 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE box
Replies: 9
Views: 30

Re: ICE box

Concentration could never have a negative value so negative answers should be omitted
by Celine 1F
Sat Jan 11, 2020 5:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Peer Learning
Replies: 4
Views: 25

Re: Peer Learning

Peer learning sessions are extremely useful sessions that are led by undergraduate assistants. They usually go over practice problems or have their own worksheets for you to do to help you better understand the material.
by Celine 1F
Sat Jan 11, 2020 5:11 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Exothermic and endothermic reactions
Replies: 4
Views: 23

Re: Exothermic and endothermic reactions

If the reaction is exothermic and heat is added, then the reverse reaction would be favorable, causing more reactants to form. Heat can be seen as a product here, so if heat is added, more reactants will form.
by Celine 1F
Sat Jan 11, 2020 3:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Why does only Temp affect K?
Replies: 9
Views: 44

Re: Why does only Temp affect K?

If the temperature changes, the reaction shifts to one side in equilibrium, changing K
by Celine 1F
Sat Jan 11, 2020 3:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K vs. Q
Replies: 10
Views: 51

Re: K vs. Q

K is found when the reaction is at equilibrium, whereas Q can be found at any time during the reaction. Q helps us identify which way the reaction is proceeding
by Celine 1F
Sun Dec 08, 2019 9:27 am
Forum: Biological Examples
Topic: EDTA
Replies: 3
Views: 42

Re: EDTA

It is a hexadentate and has a charge of -4
by Celine 1F
Sun Dec 08, 2019 9:17 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Memorizing Ligands
Replies: 3
Views: 50

Re: Memorizing Ligands

It is also important to know dien, which is a tridentate (:
by Celine 1F
Sat Dec 07, 2019 4:51 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Relative Acidity
Replies: 2
Views: 30

Relative Acidity

Can someone explain to me how resulting anion stability correlates to acid strength
by Celine 1F
Sat Dec 07, 2019 4:48 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: KA
Replies: 3
Views: 34

KA

how do you find KA values
by Celine 1F
Sat Dec 07, 2019 4:48 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKA values
Replies: 4
Views: 39

pKA values

what is pKA and why is it important
by Celine 1F
Sun Dec 01, 2019 5:25 pm
Forum: Conjugate Acids & Bases
Topic: NH3, acid or base?
Replies: 12
Views: 645

Re: NH3, acid or base?

NH3, or ammonia, is typically a weak base.
by Celine 1F
Sun Dec 01, 2019 5:21 pm
Forum: Lewis Acids & Bases
Topic: acid v. base?
Replies: 16
Views: 73

Re: acid v. base?

lewis bases typically donate electron pairs while lewis acids accept electron pairs
by Celine 1F
Sun Dec 01, 2019 5:17 pm
Forum: Amphoteric Compounds
Topic: Identifying Them?
Replies: 12
Views: 62

Re: Identifying Them?

A compound can be identified as a amphoteric compound if they accept and donate hydrogen ions.
by Celine 1F
Sun Dec 01, 2019 5:16 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted Base and Acid
Replies: 5
Views: 33

Re: Bronsted Base and Acid

Yes, a bronsted base accepts protons while bronsted acids donates protons.
by Celine 1F
Sun Dec 01, 2019 5:12 pm
Forum: Lewis Acids & Bases
Topic: bronsted vs lewis
Replies: 9
Views: 43

Re: bronsted vs lewis

Bronsted acids and bases deal with protons whereas Lewis acids and bases deal with electrons. For example, a bronsted base accepts protons while a lewis base donates electrons
by Celine 1F
Sun Dec 01, 2019 5:08 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Characteristics of a polydentate ligand
Replies: 3
Views: 17

Re: Characteristics of a polydentate ligand

All polydentates have 2+ lewis base sites so it donates 2 or more electron pairs to the central atom
by Celine 1F
Sun Dec 01, 2019 5:00 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: polydentate
Replies: 3
Views: 17

Re: polydentate

Polydentates are ligands that bind to the transition metal at several sites. It refers to the ligand's amount of binding sites
by Celine 1F
Sat Nov 30, 2019 1:27 am
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Content
Replies: 14
Views: 81

Re: Final Exam Content

I believe the final is cumulative, so it will have everything we learned this quarter.
by Celine 1F
Sun Nov 24, 2019 12:42 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw
Replies: 23
Views: 126

Re: Seesaw

Yes it should be less than 9- or 120 because the lone pairs should create a repulsion.
by Celine 1F
Sat Nov 23, 2019 9:10 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: edta
Replies: 8
Views: 606

Re: edta

It is able to form 6 bonds
by Celine 1F
Sat Nov 23, 2019 9:09 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation State
Replies: 4
Views: 21

Oxidation State

How do you find the oxidation state of an element?
by Celine 1F
Sat Nov 23, 2019 9:07 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydenate vs Chelate
Replies: 1
Views: 29

Polydenate vs Chelate

Can someone tell me the definition of these two? I am still bit confused.
by Celine 1F
Sat Nov 23, 2019 9:02 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Compound
Replies: 3
Views: 30

Coordination Compound

Can someone tell me what exactly are coordination compounds?
by Celine 1F
Sat Nov 23, 2019 9:00 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: What are Ligands?
Replies: 6
Views: 36

Re: What are Ligands?

A ligand is a molecule or atom that bind to a central metal atom. They can also be described as electrons donors.
by Celine 1F
Fri Nov 15, 2019 2:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vsepr formula
Replies: 3
Views: 31

Re: vsepr formula

A represents the central atom, X represents the bonded atom, and E represents the lone pairs
by Celine 1F
Thu Nov 14, 2019 10:36 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Electron distortion
Replies: 4
Views: 32

Re: Electron distortion

Electron distortion refers to how easily it is for an electron cloud to be pulled or attracted to another atom or molecule. The larger a molecule is, the less it is attracted towards its own nucleus, so its electron cloud is more easily distorted than that of small molecules. Big molecules are more ...
by Celine 1F
Thu Nov 14, 2019 10:29 am
Forum: Sigma & Pi Bonds
Topic: Drawing
Replies: 6
Views: 33

Re: Drawing

Although we do not need to know how to draw the true shape of molecular structures, we have to know the name and be able to identify the shape.
by Celine 1F
Thu Nov 14, 2019 10:24 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 2
Views: 23

Bond Angles

For the test, do we have to know how to determine the degree of bond angles in the structure?
by Celine 1F
Thu Nov 14, 2019 10:17 am
Forum: Ionic & Covalent Bonds
Topic: Electronegativity
Replies: 7
Views: 41

Re: Electronegativity

I don't think we will be receiving a chart but learning and using the periodic table trends of electronegativity will definitely help you out!
by Celine 1F
Thu Nov 14, 2019 10:13 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Intermolecular forces
Replies: 10
Views: 82

Re: Intermolecular forces

Both London forces and Van Der Waals interactions are the same thing and can replace each other in a a sentence. These are the weakest intermolecular forces compared to the others.
by Celine 1F
Thu Nov 14, 2019 10:00 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Test Topics
Replies: 11
Views: 88

Test Topics

What material is going to be on the test next week? Will we have to draw VSEPR models on the test?
by Celine 1F
Tue Nov 12, 2019 1:19 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Week 7 Homework
Replies: 2
Views: 29

Week 7 Homework

For homework this week, what sections are we allowed to do??
by Celine 1F
Sun Nov 10, 2019 12:23 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarisability vs Polarizing Power
Replies: 15
Views: 111

Re: Polarisability vs Polarizing Power

smaller cations have high polarizing power while big anions have high polarizability. Polarizability measures how easily an electron cloud can be distorted while polarizing power measures the ability of an ion to polarize another ion
by Celine 1F
Sun Nov 10, 2019 12:20 am
Forum: Ionic & Covalent Bonds
Topic: Polarizability
Replies: 4
Views: 24

Re: Polarizability

large ions are highly polarizable because as electron distance from the nucleus increases, the valence electrons feel a reduced attraction to the nucleus and are easily attracted to nuclei of other molecules.
by Celine 1F
Sun Nov 10, 2019 12:18 am
Forum: Ionic & Covalent Bonds
Topic: C, N, O, and F
Replies: 13
Views: 96

Re: C, N, O, and F

Because they are located in period two, where there is no d block for the electrons to backfill.
by Celine 1F
Sun Nov 10, 2019 12:14 am
Forum: Electronegativity
Topic: Ionization Energy
Replies: 3
Views: 27

Re: Ionization Energy

Nitrogen has a higher ionization energy because it is more stable than oxygen. it has three electrons in its p orbital, which means each orbital has one electron. However, oxygen has four, creating an electron electron repulsion that makes it easier to remove their electron from O than N
by Celine 1F
Sun Nov 10, 2019 12:05 am
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 18
Views: 110

Re: Resonance Structures

Resonance structures are Lewis Structures for a compound that can alternate in regards to where their electrons are. Their structure stays the same but electrons are moved around.
by Celine 1F
Thu Nov 07, 2019 10:45 am
Forum: Bond Lengths & Energies
Topic: Test 2 Topics
Replies: 40
Views: 366

Re: Test 2 Topics

It will be material from after the midterm!
by Celine 1F
Thu Nov 07, 2019 10:43 am
Forum: Electronegativity
Topic: Trend of Electronegativity
Replies: 22
Views: 106

Re: Trend of Electronegativity

Electronegativity increases as you move up and to the right of the periodic table, which makes Fluorine the most electronegative
by Celine 1F
Thu Nov 07, 2019 10:07 am
Forum: Student Social/Study Group
Topic: Class Grading
Replies: 36
Views: 524

Re: Class Grading

you're right!
by Celine 1F
Thu Nov 07, 2019 10:06 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg
Replies: 3
Views: 46

Re: Heisenberg

Delta X is the uncertainty in the position, while Delta P represents the uncertainty in momentum.
by Celine 1F
Sun Nov 03, 2019 9:09 pm
Forum: Quantum Numbers and The H-Atom
Topic: Rules for n, l,m
Replies: 11
Views: 74

Re: Rules for n, l,m

n = a #
l = (n-1)
ml = -l ... +l
ms = -1/2 or + 1/2
by Celine 1F
Sun Nov 03, 2019 9:07 pm
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 239

Re: What are the units of hertz

Hz is the measurement of frequency and it is 1 cycle per second
by Celine 1F
Sun Nov 03, 2019 9:06 pm
Forum: Electronegativity
Topic: Trends of the Periodic Table
Replies: 3
Views: 37

Trends of the Periodic Table

Can someone describe the trends of the periodic table that we need to know again?
by Celine 1F
Sun Nov 03, 2019 8:56 pm
Forum: Octet Exceptions
Topic: Octet Rule exceptions
Replies: 14
Views: 113

Octet Rule exceptions

How do know which elements don't have to follow the octet rule?
by Celine 1F
Sun Nov 03, 2019 8:52 pm
Forum: *Black Body Radiation
Topic: Midterm
Replies: 3
Views: 51

Re: Midterm

I don't think it is on the midterm.
by Celine 1F
Sun Nov 03, 2019 8:51 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Aufbau vs Hunds
Replies: 6
Views: 43

Aufbau vs Hunds

What is the difference between Aufbau's Principle and Hunds rule?
by Celine 1F
Sun Oct 27, 2019 12:51 am
Forum: SI Units, Unit Conversions
Topic: Midterm
Replies: 6
Views: 74

Midterm

Will the midterm be covering topics for high school? For example, would we get any limiting reactant questions or molarity questions?
by Celine 1F
Sun Oct 27, 2019 12:49 am
Forum: Trends in The Periodic Table
Topic: Aufbau Principle
Replies: 11
Views: 83

Re: Aufbau Principle

electrons tend to fill up the lower energy orbitals before the higher energy ones. Energy levels begins at 1 and continues to increase by groups
by Celine 1F
Sun Oct 27, 2019 12:38 am
Forum: Ionic & Covalent Bonds
Topic: Cation
Replies: 23
Views: 189

Re: Cation

Cations are ions that have a positive charge as a result of giving away their electrons. Anions are ions that have a negative charge because they gained an electron. Ions that are anions have a higher electronegativity than cations.
by Celine 1F
Sun Oct 27, 2019 12:34 am
Forum: Lewis Structures
Topic: Homework Help
Replies: 1
Views: 24

Homework Help

How do you identify structures of lower energy in molecules? I'm not sure how to do 2B.23: Determine the formal charge on each atom in the following molecules. Identify the structure of lower energy in each pair.
by Celine 1F
Wed Oct 23, 2019 12:21 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Homework Help
Replies: 5
Views: 38

Homework Help

Can someone explain number 1E.7 to me? The problem asks to determine whether each of the following electron configurations represents the ground state or an excited state of the atom
given and gives us a diagram in the book.
by Celine 1F
Mon Oct 21, 2019 12:32 pm
Forum: Quantum Numbers and The H-Atom
Topic: Ionization Energy
Replies: 4
Views: 22

Ionization Energy

Why is it harder to remove the second electron than the first electron from the same element?
by Celine 1F
Mon Oct 21, 2019 12:26 pm
Forum: Photoelectric Effect
Topic: KE energy & intensity
Replies: 5
Views: 39

Re: KE energy & intensity

The frequency of the light must be higher than the work function to eject an electron. As long as the frequency is high enough, increasing the intensity of the light will increase the amount of photons released.
by Celine 1F
Mon Oct 21, 2019 12:09 pm
Forum: Quantum Numbers and The H-Atom
Topic: Test Question
Replies: 3
Views: 47

Test Question

For the quizzes and tests for this class, are they mainly problem solving or will there also be concept based questions? For example, would we be tested on our knowledge on the photo electric effect?
by Celine 1F
Mon Oct 21, 2019 12:05 pm
Forum: Quantum Numbers and The H-Atom
Topic: Homework Question
Replies: 2
Views: 33

Homework Question

For week 4, do we still do homework from Quantum World?
by Celine 1F
Mon Oct 21, 2019 12:02 pm
Forum: Significant Figures
Topic: Sig Figs on Tests
Replies: 24
Views: 279

Re: Sig Figs on Tests

When determining sig figs, you have to take a look at the problem and look for which number has the least amount of sig figs and use that amount of sig figs in your answer. I know my TA is pretty lenient about sig figs though.
by Celine 1F
Tue Oct 15, 2019 10:55 pm
Forum: Properties of Light
Topic: Homework help
Replies: 4
Views: 54

Homework help

I know this one is pretty simple but I somehow managed to get confused. How do you do number 1B15 problem a?
by Celine 1F
Sat Oct 12, 2019 1:30 pm
Forum: Properties of Light
Topic: difference between Rydberg equation and De Broglie equation
Replies: 5
Views: 50

Re: difference between Rydberg equation and De Broglie equation

The Rydberg equation shows the relationship between the wavelength/frequency of a line on the spectrum, as well as the energy levels involved in the transitions. The De Broglie equations demonstrates the relationship between mass, velocity, and wavelength of a particle.
by Celine 1F
Sat Oct 12, 2019 3:15 am
Forum: Properties of Electrons
Topic: De Broglie Problems
Replies: 4
Views: 37

De Broglie Problems

How can I tell whether or not my calculated wavelength is measurable/detectable or not? o:
by Celine 1F
Fri Oct 11, 2019 7:21 pm
Forum: Properties of Light
Topic: Frequency vs. Wavelength
Replies: 15
Views: 106

Re: Frequency vs. Wavelength

Frequency and wavelength are inversely proportional to one another.
by Celine 1F
Fri Oct 11, 2019 7:19 pm
Forum: Properties of Electrons
Topic: Electron Energy Levels
Replies: 8
Views: 47

Electron Energy Levels

Is there an infinite amount of energy levels an electron can jump to or is there only a certain amount?
by Celine 1F
Fri Oct 11, 2019 7:12 pm
Forum: Properties of Electrons
Topic: Wave properties
Replies: 5
Views: 34

Wave properties

What is the determining factor that makes something have wavelike properties in the work problems we did today?
by Celine 1F
Sat Oct 05, 2019 5:02 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Theoretical vs. Actual Yield
Replies: 38
Views: 473

Re: Theoretical vs. Actual Yield

The actual yield is less than the theoretical yield because impurities can occur, like products getting stuck to the side of the beaker.
by Celine 1F
Thu Oct 03, 2019 8:51 pm
Forum: Limiting Reactant Calculations
Topic: Study Strategies/Youtube Videos
Replies: 14
Views: 159

Study Strategies/Youtube Videos

I found that I learn best by watching videos on the topics that I need to study so I was wondering if there's anyone on youtube or anything that you guys recommend watching based on how well they teach/explain the concepts, specifically for chem?
by Celine 1F
Thu Oct 03, 2019 8:45 pm
Forum: Empirical & Molecular Formulas
Topic: 5 Homework Problems Due
Replies: 21
Views: 221

Re: 5 Homework Problems Due

The questions can be any 5 from the ones that he posted, regardless of the chapter. For week 1 they're due on Friday but for the remaining weeks, we just turn them into our discussion class!
by Celine 1F
Thu Oct 03, 2019 3:28 pm
Forum: SI Units, Unit Conversions
Topic: Discussion Credit
Replies: 7
Views: 106

Discussion Credit

I have been hearing different information about getting credit posting here. Do we have to interact on Chemistry Community 5 times a week or 3 times a week? Also, do we have to both pose questions and answer or could we do one of these for all 3 or 5 times?
by Celine 1F
Thu Oct 03, 2019 2:14 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 4
Views: 45

Sig Figs

Just for clarification, when we are using sig figs, would we only take into account the given numbers in the word problem or would we also have to take into consideration the molar masses/atomic masses numbers?

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