## Search found 72 matches

Fri Jan 22, 2021 8:34 am
Forum: Phase Changes & Related Calculations
Topic: H and q
Replies: 25
Views: 69

### H and q

Is heat denoted with q or H? Or is H for heat and q is for enthalpy specifically?
Fri Jan 22, 2021 6:54 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: AUTOPROTOLYSIS
Replies: 5
Views: 22

### AUTOPROTOLYSIS

Could someone please explain what autoprotolysis is, and its importance? Is it the conversion of water to H3O+ and OH-?
Fri Jan 22, 2021 6:40 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: lecture 6 question
Replies: 2
Views: 12

### lecture 6 question

In lecture 6, Dr. Lavelle included this example

"What id the pH and percentage ionization of acetic acid in 0.1 M of CH3COOH?"

My question is from reading this question, how were we supposed to know we were solving for the pH of the solution (-log[H3O+]), and not for the pH of CH3COOH?
Tue Jan 19, 2021 3:17 pm
Forum: Phase Changes & Related Calculations
Topic: ionization percentage
Replies: 10
Views: 38

### Re: ionization percentage

oh okay, thank you that makes sense1
Mon Jan 18, 2021 10:10 am
Forum: Phase Changes & Related Calculations
Topic: ionization percentage
Replies: 10
Views: 38

### ionization percentage

can someone explain what ionization percentage refers to?
Fri Jan 15, 2021 11:57 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: q and K
Replies: 11
Views: 29

### Re: q and K

Also what is the temperature K is measured at? Is it always 25 degrees C?
Fri Jan 15, 2021 11:56 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: q and K
Replies: 11
Views: 29

### q and K

Hey, just wanted to clarify that the only difference between Q and k is that K has to be measured at a certain temoerature?
Fri Jan 15, 2021 11:55 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: the different Ks
Replies: 3
Views: 22

### the different Ks

I am confused about the different Ks: Ka, Kb, Kw, Kc, and Kp. What exactly are the differences between them?
Fri Jan 15, 2021 11:54 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: the different Ks
Replies: 7
Views: 31

### the different Ks

I am confused about the different Ks: Ka, Kb, Kw, Kc, and Kp. What exactly are the differences between them?
Wed Jan 13, 2021 12:37 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: sampling question 5
Replies: 3
Views: 26

### sampling question 5

Does anyone know how to do sampling question 5? It's the question that gives us multiple Kc and reaction equations and asks us to solve for the overall K
Tue Jan 12, 2021 11:57 am
Forum: Ideal Gases
Topic: Sampling hw #4
Replies: 15
Views: 140

### Re: Sampling hw #4

ohhh okay thank you!!1
Tue Jan 12, 2021 11:53 am
Forum: Ideal Gases
Topic: Sampling hw #4
Replies: 15
Views: 140

### Sampling hw #4

Does anyone know how to solve sampling hw #4: At a certain temperature, the given reaction has an equilibrium constant of Kp=325 . PCl3(g)+Cl2(g)↽−−⇀PCl5(g) PCl5 is placed in a sealed container at an initial pressure of 0.0400 bar . What is the total pressure at equilibrium? what do we do because th...
Mon Jan 11, 2021 1:28 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sampling hw #2
Replies: 6
Views: 32

### Re: Sampling hw #2

got it thank you!
Mon Jan 11, 2021 12:46 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sampling hw #2
Replies: 6
Views: 32

### Re: Sampling hw #2

why would we subtract 2x from .288
Mon Jan 11, 2021 9:01 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sampling hw #2
Replies: 6
Views: 32

### Sampling hw #2

Hey can someone explain how to go about finding the other concentrations inn samplinh hw #2?

Here is the question for reference:

At a certain temperature, 0.720 mol SO3 is placed in a 2.50 L container.

2SO3(g)↽−−⇀2SO2(g)+O2(g)

At equilibrium, 0.180 mol O2 is present. Calculate Kc.
Fri Jan 08, 2021 6:53 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q and K
Replies: 46
Views: 157

### Q and K

Is the only difference between Q and k the fact that Q is measured at any time, and K is only measured when at equilibrium?
Thu Jan 07, 2021 5:04 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 109
Views: 929

### Re: Kc vs Kp

when the reactants and products use Kp which is for partial pressure and use Kc when the reactants or products are in aqueous form. when the reactants or products are solids or liquids we disregard them.

hope this helps!! :)
Wed Jan 06, 2021 7:32 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium Constant
Replies: 8
Views: 51

### Re: Equilibrium Constant

Great thanks !
Wed Jan 06, 2021 7:31 pm
Forum: Ideal Gases
Topic: Ideal vs real gases
Replies: 12
Views: 59

### Ideal vs real gases

How do you know if the gas is ideal or if it’s real?
Tue Jan 05, 2021 6:15 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Pure Substances Concentration
Replies: 4
Views: 21

### Pure Substances Concentration

In Monday’s lecture Dr. Lavelle said that sold and kiwis don’t have concentration. So then in the example he gave, why did he count the products that were in the aqueous phase?

Thank you in advance :) -
Mon Jan 04, 2021 7:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium Constant
Replies: 8
Views: 51

### Equilibrium Constant

If the denominator (or the reactant concentration) is the greater concentration between the reactant and products, does that mean the reaction favors the reactant?
Tue Dec 08, 2020 5:26 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: paired and parallel
Replies: 10
Views: 55

### Re: paired and parallel

thanks!!
Tue Dec 08, 2020 5:25 pm
Forum: Dipole Moments
Topic: induced dipole
Replies: 4
Views: 31

### Re: induced dipole

also when we say an induced dipole moment has an interaction potential energy of -2 kj mol^-1 are we saying this is the energy given off when two dipoles interact or are we saying this is how much energy is needed for an interaction?
Tue Dec 08, 2020 5:23 pm
Forum: Dipole Moments
Topic: induced dipole
Replies: 4
Views: 31

### induced dipole

what is the difference between dipole and induced dipole? And what is the significance of induced dipole ?
Tue Dec 08, 2020 5:21 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: hydrogen bonding and melting points
Replies: 3
Views: 28

### hydrogen bonding and melting points

how does hydrogen bonding lead to a higher boiling and melting point?
Wed Dec 02, 2020 3:09 am
Forum: DeBroglie Equation
Topic: if light does not have mass...
Replies: 2
Views: 55

### Re: if light does not have mass...

thanks!! that clears it up :)
Wed Dec 02, 2020 3:08 am
Forum: Quantum Numbers and The H-Atom
Topic: electrostatic potential energy
Replies: 1
Views: 32

### electrostatic potential energy

Currently reviewing and I'm wondering what electrostatic potential energy is and why its important
Mon Nov 30, 2020 8:54 am
Forum: DeBroglie Equation
Topic: if light does not have mass...
Replies: 2
Views: 55

### if light does not have mass...

This question may be asking to understand too much, but I'm a little curious. If we use De Broglie's equation to find the wavelength/show the wavelike properties of a particle, then how come the equation was derived from equations used for light? I thought light does not have mass, so how can we use...
Mon Nov 16, 2020 8:48 pm
Forum: Quantum Numbers and The H-Atom
Topic: when n=5 and l=4
Replies: 16
Views: 156

### Re: when n=5 and l=4

oh okay thank you for the bit about sampling too.
Mon Nov 16, 2020 8:47 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 178
Views: 881

### Re: Favorite TV shows

yes! ahaha i love living vicariously through them.
Mon Nov 16, 2020 8:46 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin state
Replies: 25
Views: 175

### Re: Spin state

wait could you further explain what you mean?
Mon Nov 16, 2020 8:38 pm
Forum: Quantum Numbers and The H-Atom
Topic: subshells and orbitals
Replies: 9
Views: 95

### Re: subshells and orbitals

thank you!
Fri Nov 06, 2020 3:01 am
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 178
Views: 881

### Re: Favorite TV shows

I 100% recommend watching the vampire diaries, gossip girl,new girl, young and hungry, and honestly I have so many more suggestions!! hmu if you need more ideas :)
Fri Nov 06, 2020 2:57 am
Forum: Bond Lengths & Energies
Replies: 5
Views: 157

i'm pretty sure the stability of radicals increase as its degree increases
Fri Nov 06, 2020 2:55 am
Forum: Quantum Numbers and The H-Atom
Topic: ml number possibilities
Replies: 4
Views: 49

### Re: ml number possibilities

ohhhh okay so it corresponds to the number of orbitals, got it thanks!
Fri Nov 06, 2020 2:54 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: paired and parallel
Replies: 10
Views: 55

### Re: paired and parallel

oh okay so spin and parallel and paired electrons go hand in hand. thank you
Fri Nov 06, 2020 2:53 am
Forum: Quantum Numbers and The H-Atom
Topic: subshells and orbitals
Replies: 9
Views: 95

### Re: subshells and orbitals

this is actually very helpful thank you so much!
Wed Nov 04, 2020 8:28 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: numbers in electron configuration
Replies: 5
Views: 25

### numbers in electron configuration

When writing electron configurations, what does the number in front of the configuration symbolize. for example in 1s^2 2s^2, what do the 1 and the 2 symbolize?
Wed Nov 04, 2020 6:52 am
Forum: Quantum Numbers and The H-Atom
Topic: ml number possibilities
Replies: 4
Views: 49

### ml number possibilities

Once we know the different possibilities for ml (i.e -1,0,1), how do we then decide which number is the actual number for a given quantum number?
Wed Nov 04, 2020 6:48 am
Forum: Quantum Numbers and The H-Atom
Topic: subshells and orbitals
Replies: 9
Views: 95

### subshells and orbitals

What is the difference between a subshell and an orbital? I know an orbital has subshells, so maybe it means subshells are parts of orbitals, but if that were the case would that then mean that orbitals could have more than one type of subshell?
Wed Nov 04, 2020 6:45 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: paired and parallel
Replies: 10
Views: 55

### paired and parallel

What does it mean when you say two electrons are paired and two are parallel?
Tue Nov 03, 2020 1:35 am
Forum: Lewis Structures
Topic: charge by square bracket
Replies: 8
Views: 61

### Re: charge by square bracket

the sign corresponds to the sign (charge of the molecule)! if the molecule is positively charged you would put a "+" if it is negatively charged you put a "-"

Hope this helps :)
Fri Oct 30, 2020 8:25 am
Forum: Properties of Light
Topic: photons vs quanta
Replies: 3
Views: 57

### Re: photons vs quanta

oh okay that makes a lot more sense! Thank you
Fri Oct 30, 2020 8:18 am
Forum: Properties of Light
Topic: photons vs quanta
Replies: 3
Views: 57

### photons vs quanta

In lecture 5, Dr. Lavelle said that "light is emitted in discrete units, quanta or photons"

Can someone explain the difference between quanta and photons?
Wed Oct 28, 2020 10:10 am
Forum: Quantum Numbers and The H-Atom
Topic: relationship between ml and l
Replies: 2
Views: 28

### relationship between ml and l

When L=1, mL= -1,0,or +1. So then how do we determine whether mL is equal to -1, 0, or +1?
Wed Oct 28, 2020 10:08 am
Forum: Quantum Numbers and The H-Atom
Topic: when n=5 and l=4
Replies: 16
Views: 156

### when n=5 and l=4

When the quantum number n is equal to five, l is then equal to 4. So in this case, what orbital does the 4th shell fall under then?
Wed Oct 28, 2020 10:06 am
Forum: Quantum Numbers and The H-Atom
Topic: Spin state
Replies: 25
Views: 175

### Spin state

What exactly does the spin state of an electron tell us about an electron?
Fri Oct 23, 2020 1:26 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: x,y,z plane
Replies: 2
Views: 30

### Re: x,y,z plane

that helped so much, thank you!!
Fri Oct 23, 2020 1:05 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: nodal plane
Replies: 5
Views: 39

### Re: nodal plane

alright thank you very much :)
Fri Oct 23, 2020 12:54 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: nodal plane
Replies: 5
Views: 39

### Re: nodal plane

so could you basically say that a nodal plane is, in a sense, equal to when psi^2 = 0?
Fri Oct 23, 2020 12:51 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: nodal plane
Replies: 5
Views: 39

### Re: nodal plane

ohh okay thank you very much!!
Fri Oct 23, 2020 12:48 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: what are orbitals?
Replies: 2
Views: 31

### Re: what are orbitals?

Thank you! that makes a lot more sense
Fri Oct 23, 2020 12:38 pm
Forum: DeBroglie Equation
Topic: Smallest Measurable Wavelength
Replies: 7
Views: 58

### Re: Smallest Measurable Wavelength

Just confirming that Dr. Lavelle told us that it is 10^-15 m.
Fri Oct 23, 2020 12:35 pm
Forum: DeBroglie Equation
Topic: Light and momentum
Replies: 7
Views: 58

### Re: Light and momentum

I am pretty sure Dr. Lavelle said that light does not actually have any momentum, but it has energy which takes the place of momentum.
Fri Oct 23, 2020 12:32 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: x,y,z plane
Replies: 2
Views: 30

### x,y,z plane

why are there different planes for orbitals? what is the purpose of the planes? Is it because on one side of the plane, and orbital is positive, but on the other it is negative? Because I though electrons always have negative charges, so I am confused about what the x,y,z planes are for.
Fri Oct 23, 2020 12:30 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: what are orbitals?
Replies: 2
Views: 31

### what are orbitals?

I just want to make sure that my understanding of what an orbital is is correct.

An orbital is kind of like a pack of electrons around the nucleus of an atom? Or is it more so one electron's wave?
Fri Oct 23, 2020 12:29 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: nodal plane
Replies: 5
Views: 39

### nodal plane

What exactly is a nodal plane and what is its function?
Fri Oct 16, 2020 12:38 pm
Forum: Properties of Light
Topic: bohr frequency condition
Replies: 4
Views: 65

### bohr frequency condition

Can someone explain what the bohr frequency condition is trying to say essentially? I think I have an understanding but I am not sure.
Thu Oct 15, 2020 8:24 am
Forum: Properties of Light
Topic: intensity, photons, and frequency
Replies: 7
Views: 58

### Re: intensity, photons, and frequency

that makes a lot of sense thank you very much1
Wed Oct 14, 2020 4:23 pm
Forum: Properties of Light
Topic: intensity, photons, and frequency
Replies: 7
Views: 58

### intensity, photons, and frequency

In one lecture Dr. Lavelle said that intensity is proportional to the numberer of photons, is this also the same for photons and frequency?
Wed Oct 14, 2020 4:20 pm
Forum: Properties of Light
Topic: photons and quanta
Replies: 7
Views: 80

### Re: photons and quanta

thanks so much!
Wed Oct 14, 2020 2:20 pm
Forum: Properties of Light
Topic: photons and quanta
Replies: 7
Views: 80

### photons and quanta

In the first lecture this week, Dr. Lavelle said light is absorbed/emitted in discrete units, quanta or photons.

So my question is, what is the difference between quanta and photons?
Wed Oct 14, 2020 2:10 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 3
Views: 36

### Re: Photoelectric effect

thank you so much that makes a lot more sense!!
Mon Oct 12, 2020 4:42 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 3
Views: 36

### Photoelectric effect

I want to make sure I understand this concept so can someone confirm my understanding, or help explain it better. The photoelectric effect is simply just stating that there are other properties of light that affects its energy transmission. Please feel free to further explain this concept even if it...
Mon Oct 12, 2020 12:31 pm
Forum: Significant Figures
Topic: rounding during equations
Replies: 14
Views: 106

### rounding during equations

How should we round while we are in the process of solving an equation?
Sat Oct 10, 2020 7:45 pm
Forum: Student Social/Study Group
Topic: Forming Virtual Study Group
Replies: 31
Views: 172

### Re: Forming Virtual Study Group

i'd be down! all my socials are @tofunmibaru and i think my group me is @tofunmibaru too :)
Fri Oct 09, 2020 11:18 am
Forum: SI Units, Unit Conversions
Topic: Common SI Unitis
Replies: 2
Views: 39

### Common SI Unitis

In wednesdays lecture, Dr. Lavelle gave us a list of common prefixes. Which ones will we be using for this chemistry class?
Fri Oct 09, 2020 11:13 am
Forum: Empirical & Molecular Formulas
Topic: difference between empirical and molecular
Replies: 15
Views: 70

### Re: difference between empirical and molecular

The empirical formula is the ratio of atoms while the molecular formula gives you the actual amount of atoms in a molecule, so they won't be equal.
Fri Oct 09, 2020 11:11 am
Forum: SI Units, Unit Conversions
Topic: Mole notation
Replies: 7
Views: 69

### Mole notation

When we write molar mass do we use the notaion g.mol^-1 or g/mol or are they interchangeable?
Wed Oct 07, 2020 8:29 am
Forum: Balancing Chemical Reactions
Topic: Combustion
Replies: 14
Views: 189

### Re: Combustion

Combustion, burning and oxidation are all the same thing! During an oxidation reaction, oxygen is loss and energy is released. The same thing happens during combustion and burning. This is why it is referred to as an EXOthermic reaction. Exo meaning something is released. I hope this helps :)
Tue Oct 06, 2020 8:39 am
Forum: Molarity, Solutions, Dilutions
Topic: Molar mass for O2 vs O
Replies: 11
Views: 116

### Re: Molar mass for O2 vs O

Thank you all so much for clearing that up!
Mon Oct 05, 2020 2:13 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molar mass for O2 vs O
Replies: 11
Views: 116

### Molar mass for O2 vs O

This may be a dumb question but when calculating the molar mass for O2 do we calculate it as 16 g/mol + 16 g/mol? Or is the molecule mass the same as the singular atom mass? I just need a little clarification, thank you!