Search found 64 matches

by Johnathan Smith 1D
Sun Jan 26, 2020 7:18 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard States
Replies: 2
Views: 6

Standard States

Can somebody explain to me exactly what is meant by a standard state? I have an idea, but I am not sure I have it in my head correctly.
by Johnathan Smith 1D
Sun Jan 26, 2020 7:15 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law
Replies: 9
Views: 26

Hess's Law

What does Hess's law describe?
by Johnathan Smith 1D
Sun Jan 26, 2020 7:14 pm
Forum: Phase Changes & Related Calculations
Topic: Phase Changes
Replies: 2
Views: 12

Phase Changes

Do we need to know any phase changes that would be exothermic?
by Johnathan Smith 1D
Sun Jan 26, 2020 7:11 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Friday Lecture
Replies: 2
Views: 11

Friday Lecture

Can someone explain the third method that Lavelle went over in class on Friday?
by Johnathan Smith 1D
Sun Jan 19, 2020 5:33 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5H.1 and 5H.3?
Replies: 2
Views: 15

Re: 5H.1 and 5H.3?

I don’t really know how to explain it but page 410 in the book talks about 5H.1
by Johnathan Smith 1D
Sun Jan 19, 2020 5:30 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Homework problem 5.I.15
Replies: 4
Views: 14

Re: Homework problem 5.I.15

I don’t know. I didn’t use an ice table either to get it.
by Johnathan Smith 1D
Sun Jan 19, 2020 5:28 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: 5I.19
Replies: 1
Views: 17

5I.19

Does anyone know how to start number 19? It says only 60 percent of the hydrogen reaction, but I’m not really sure what to do with that.
by Johnathan Smith 1D
Sun Jan 12, 2020 7:43 pm
Forum: Ideal Gases
Topic: Vapor Pressure
Replies: 4
Views: 19

Vapor Pressure

Can someone explain what vapor pressure is exactly?
by Johnathan Smith 1D
Sun Jan 12, 2020 7:39 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Pure Substances
Replies: 3
Views: 26

Pure Substances

Why are gasses/aqueous substances not considered pure substances and solids/liquids are?
by Johnathan Smith 1D
Sun Jan 12, 2020 3:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: What goes into Kc and K?
Replies: 2
Views: 13

What goes into Kc and K?

When we are trying to get K or Kc, are we only allowed to use gasses and anything that is an aqueous solutions?
by Johnathan Smith 1D
Sun Jan 12, 2020 3:30 pm
Forum: Ideal Gases
Topic: Partial Pressure
Replies: 4
Views: 16

Re: Partial Pressure

Thank you! How do figure out the molar fractions though?
by Johnathan Smith 1D
Sun Jan 12, 2020 2:31 pm
Forum: Ideal Gases
Topic: Partial Pressure
Replies: 4
Views: 16

Partial Pressure

How do you calculate partial pressure?
by Johnathan Smith 1D
Sun Dec 08, 2019 9:04 am
Forum: Biological Examples
Topic: Hemoglobin and Myoglobin
Replies: 4
Views: 52

Re: Hemoglobin and Myoglobin

we’ll probably need to know what was on Marshmallow. There’s a question on there on myo/hemoglobin asking for some information on the two. We’ll probably also have to know it’s function.
by Johnathan Smith 1D
Sun Dec 08, 2019 9:00 am
Forum: Naming
Topic: Naming the metal
Replies: 3
Views: 31

Naming the metal

How does the coordination compound affect how we name the transition metal? So like instead of just saying cobalt(III) we would say cobaltate.
by Johnathan Smith 1D
Sat Dec 07, 2019 10:13 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: -ido vs -o
Replies: 5
Views: 46

Re: -ido vs -o

It's just an another way of naming it. Means the same thing, but I'm pretty sure we can use either one as long as we are consistent.
by Johnathan Smith 1D
Sat Dec 07, 2019 10:06 pm
Forum: Lewis Acids & Bases
Topic: SO3 molecule as lewis acid
Replies: 1
Views: 28

Re: SO3 molecule as lewis acid

SO3 with three double bonds is not stable. When you put three double bonds around it, you're giving S 6 bonds with 12 electrons in its outer shell. S does not have a d orbital so we cannot expand its octet.
by Johnathan Smith 1D
Sat Dec 07, 2019 9:58 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Practice Problem
Replies: 2
Views: 23

Re: Practice Problem

I think we will just always use ferrate when naming a coordination compound
by Johnathan Smith 1D
Sat Dec 07, 2019 6:59 pm
Forum: Administrative Questions and Class Announcements
Topic: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
Replies: 111
Views: 4086

Re: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]

Can someone explain how to get the pH for 34. I got the moles of each compound but can’t seem to get the overall pH.
by Johnathan Smith 1D
Sun Dec 01, 2019 8:53 pm
Forum: Lewis Acids & Bases
Topic: lewis vs. bronsted
Replies: 10
Views: 57

Re: lewis vs. bronsted

Sorry that was my bad. I thought I had put down protons. Thanks for correcting it!
by Johnathan Smith 1D
Sun Dec 01, 2019 8:47 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong Acids
Replies: 6
Views: 22

Strong Acids

Okay I know strong acids lose the hydrogen ions easily but what exactly does that mean?
by Johnathan Smith 1D
Sun Dec 01, 2019 8:43 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Oxoacids
Replies: 2
Views: 17

Oxoacids

What are oxoacids?
by Johnathan Smith 1D
Sun Dec 01, 2019 8:40 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Super Acids
Replies: 1
Views: 13

Super Acids

What constitutes an acid as a super acid?
by Johnathan Smith 1D
Sun Dec 01, 2019 8:38 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pKa
Replies: 3
Views: 19

pKa

What is pKa and how do we find it?
by Johnathan Smith 1D
Sun Nov 24, 2019 3:39 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Bronsted vs. Lewis Acids and Bases
Replies: 4
Views: 32

Re: Bronsted vs. Lewis Acids and Bases

Bronsted acids donate electrons and Lewis acids accept electrons
by Johnathan Smith 1D
Sun Nov 24, 2019 3:32 pm
Forum: Lewis Acids & Bases
Topic: lewis vs. bronsted
Replies: 10
Views: 57

Re: lewis vs. bronsted

Bronsted acids donate electrons and Lewis acids accept electrons
by Johnathan Smith 1D
Sun Nov 24, 2019 3:13 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: chelating complexes
Replies: 2
Views: 17

Re: chelating complexes

Chelates are just the complexes that create a ring when they are bonded to the transition metal
by Johnathan Smith 1D
Sun Nov 24, 2019 3:10 pm
Forum: Naming
Topic: Naming
Replies: 3
Views: 33

Re: Naming

It depends on how many pairs of electrons are being donated. 1 is mono 2 is bi 3 is tri and 6 is hexa
*for ligands*
by Johnathan Smith 1D
Sun Nov 17, 2019 5:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Dipole Moment
Replies: 3
Views: 22

Re: Dipole Moment

When they do not cancel, the molecule is polar.
by Johnathan Smith 1D
Sun Nov 17, 2019 5:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: (CH3)2Be
Replies: 1
Views: 20

Re: (CH3)2Be

Shouldn't it be 180 degrees because Be is the central atom.
by Johnathan Smith 1D
Wed Nov 13, 2019 1:58 pm
Forum: Lewis Structures
Topic: 2.7
Replies: 2
Views: 38

Re: 2.7

I started by writing 5 nitrogens all in a line and then just started playing around with all the electrons to give me a +1 overall charge.
by Johnathan Smith 1D
Wed Nov 13, 2019 1:54 pm
Forum: Photoelectric Effect
Topic: Electrons ejected
Replies: 1
Views: 26

Re: Electrons ejected

Because intensity of the light refers to the amount of photons interacting with the metal surface, it should be intensity that determines how many electrons are ejected. That is if the light has the right frequencies and wavelength to even eject the electron in the first place.
by Johnathan Smith 1D
Wed Nov 13, 2019 1:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 15
Views: 151

Test 2

What topics should we expect to show up on test #2?
by Johnathan Smith 1D
Wed Nov 06, 2019 1:31 pm
Forum: Dipole Moments
Topic: Dipole moments
Replies: 5
Views: 44

Dipole moments

Can someone explain what dipole moments are?
by Johnathan Smith 1D
Sun Nov 03, 2019 8:22 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Why does the D block start with 3d?
Replies: 1
Views: 22

Re: Why does the D block start with 3d?

When it's empty, the 3d-orbital requires more energy than 4s so it is placed after 4s, but when you start to fill up the 3d-orbital, the energy required to fill it becomes less than it is for the 4s-orbital which is why is 3d and not 4d.
by Johnathan Smith 1D
Sun Nov 03, 2019 8:18 pm
Forum: Quantum Numbers and The H-Atom
Topic: H-atom
Replies: 1
Views: 13

Re: H-atom

It only works on the H-atom because there is only one electron. Once you start adding other electrons, the entire situation becomes much more complicated.
by Johnathan Smith 1D
Sun Nov 03, 2019 8:11 pm
Forum: *Shrodinger Equation
Topic: Shrodinger Equation
Replies: 2
Views: 40

Re: Shrodinger Equation

If I remember correctly, we do not really need to know this. I'm pretty sure Lavelle just wanted to show us why we have it.
by Johnathan Smith 1D
Sun Nov 03, 2019 3:41 pm
Forum: Resonance Structures
Topic: Resonance structures
Replies: 5
Views: 25

Resonance structures

Are resonance structures just all the different ways to draw the lewis models of the compounds?
by Johnathan Smith 1D
Sun Nov 03, 2019 3:36 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Amount of electrons in each shell
Replies: 3
Views: 22

Re: Amount of electrons in each shell

Cobalt can hold 9 because the electrons are in its d- orbital which can hold 10. s holds two. p holds 6. f holds 14.
by Johnathan Smith 1D
Sat Oct 26, 2019 3:49 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration Notation
Replies: 5
Views: 32

Re: Electron Configuration Notation

I’m sure they’re both right. I would just use the way Lavelle showed us just to be safe though.
by Johnathan Smith 1D
Sat Oct 26, 2019 3:47 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 5
Views: 49

Re: Covalent Bonds

The non metals don’t normally form cations because they are usually the ones who receive electrons from the metals they are bonding with.
by Johnathan Smith 1D
Sat Oct 26, 2019 2:50 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm 2
Replies: 4
Views: 44

Re: Midterm 2

Also. Remember to bring a scientific calculator!
by Johnathan Smith 1D
Sat Oct 26, 2019 2:49 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm 2
Replies: 4
Views: 44

Re: Midterm 2

I’m pretty sure there’s only one midterm and I would guess that it’s going to cover pretty much everything we’ve covered so far.
by Johnathan Smith 1D
Sat Oct 26, 2019 2:27 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum number m
Replies: 3
Views: 24

Quantum number m

I know we’re past quantum numbers but can someone explain to me what quantum number m tells us and how we are able to know its value.
by Johnathan Smith 1D
Sun Oct 20, 2019 4:57 pm
Forum: Quantum Numbers and The H-Atom
Topic: Wave functions
Replies: 2
Views: 20

Re: Wave functions

I think so because by using the wave function. You can determine the energy, angular momentum, and orbital orientation of the electron.
by Johnathan Smith 1D
Sun Oct 20, 2019 4:18 pm
Forum: Quantum Numbers and The H-Atom
Topic: Electron spin
Replies: 5
Views: 40

Electron spin

How do you determine which way an electron spins?
by Johnathan Smith 1D
Sun Oct 20, 2019 4:09 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 1E.11
Replies: 2
Views: 17

Re: 1E.11

For the ground state configurations. The electron configuration has to follow Hund’s rule and the Pauli Exclusion Principle.
by Johnathan Smith 1D
Sun Oct 20, 2019 3:58 pm
Forum: Quantum Numbers and The H-Atom
Topic: Orbitals
Replies: 4
Views: 31

Orbitals

Are electrons held tightest in the s-orbitals and held the least tightly in the d-orbitals?
by Johnathan Smith 1D
Sat Oct 19, 2019 4:14 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW 1E.7 b
Replies: 1
Views: 20

HW 1E.7 b

Is b not a ground state of an atom of Nitrogen because the electrons are not spinning the same way in the 2p-orbital?
by Johnathan Smith 1D
Sun Oct 13, 2019 1:59 pm
Forum: DeBroglie Equation
Topic: Problem 1B.7
Replies: 3
Views: 30

Problem 1B.7

Can someone explain how I would go about part b in problem 1B.7? I know how to do part a, but I can't figure out b.
by Johnathan Smith 1D
Sat Oct 12, 2019 8:14 pm
Forum: Properties of Electrons
Topic: wavelike properties of an electron
Replies: 4
Views: 48

Re: wavelike properties of an electron

I'm not really sure. I was just reading another post that asked a similar question and it sounded like the answer to your question is a yes. I would look at it though just to be sure.
by Johnathan Smith 1D
Sat Oct 12, 2019 8:08 pm
Forum: Properties of Electrons
Topic: Properties of electron being Particle v Wave
Replies: 3
Views: 31

Re: Properties of electron being Particle v Wave

What is the difference between an electron's particle-like and wave-like properties?
by Johnathan Smith 1D
Sat Oct 12, 2019 7:52 pm
Forum: DeBroglie Equation
Topic: Chemistry Community Weekly Points
Replies: 3
Views: 21

Re: Chemistry Community Weekly Points

It does. Thank you!
by Johnathan Smith 1D
Sat Oct 12, 2019 7:43 pm
Forum: DeBroglie Equation
Topic: Chemistry Community Weekly Points
Replies: 3
Views: 21

Chemistry Community Weekly Points

What is the deadline for the chemistry community points? I know it's Sunday, but is it at a certain time?
by Johnathan Smith 1D
Sat Oct 12, 2019 7:39 pm
Forum: DeBroglie Equation
Topic: Thanksgiving Week
Replies: 1
Views: 20

Thanksgiving Week

Does anybody know if we'll have class the Wednesday before Thanksgiving?
by Johnathan Smith 1D
Thu Oct 03, 2019 9:15 pm
Forum: Balancing Chemical Reactions
Topic: Homework
Replies: 4
Views: 61

Re: Homework

Discussion Section? Left or right corner?
by Johnathan Smith 1D
Thu Oct 03, 2019 8:21 pm
Forum: Balancing Chemical Reactions
Topic: Homework
Replies: 4
Views: 61

Homework

Is there a certain way that he wants us to put our names on our papers to turn in?
by Johnathan Smith 1D
Thu Oct 03, 2019 12:43 pm
Forum: Empirical & Molecular Formulas
Topic: Rounding [ENDORSED]
Replies: 12
Views: 133

Re: Rounding [ENDORSED]

Thank you for this!! I had little knowledge on sig figs, but this is really helpful!!!
by Johnathan Smith 1D
Thu Oct 03, 2019 12:07 pm
Forum: Empirical & Molecular Formulas
Topic: Test Materials
Replies: 13
Views: 122

Re: Test Materials

Are we also going to be given Avogadro's number?
by Johnathan Smith 1D
Thu Oct 03, 2019 12:04 pm
Forum: Empirical & Molecular Formulas
Topic: Homework L39
Replies: 5
Views: 44

Re: Homework L39

What about for cases like Cu(NO3)2? How do we get to know the charge of copper?

This is for M9.
by Johnathan Smith 1D
Thu Oct 03, 2019 11:42 am
Forum: Empirical & Molecular Formulas
Topic: Homework L39
Replies: 5
Views: 44

Homework L39

Can somebody explain to me why Sn02 is Tin(IV) Oxide?
by Johnathan Smith 1D
Thu Oct 03, 2019 11:33 am
Forum: Limiting Reactant Calculations
Topic: Homework Week 1
Replies: 18
Views: 196

Re: Homework Week 1

Okay Thank you!! I've been doing five from each section just to be safe.
by Johnathan Smith 1D
Thu Oct 03, 2019 11:26 am
Forum: Limiting Reactant Calculations
Topic: Homework Week 1
Replies: 18
Views: 196

Homework Week 1

Can someone clarify exactly what we are supposed to do for Homework? Are we doing five problems overall or five from each section?

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