Search found 101 matches

by 005384106
Wed Mar 11, 2020 6:30 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Fast Step/Slow Step
Replies: 7
Views: 24

Re: Fast Step/Slow Step

How do you determine which step is fast/slow?
by 005384106
Wed Mar 11, 2020 6:29 pm
Forum: General Science Questions
Topic: Chemistry Final
Replies: 16
Views: 151

Re: Chemistry Final

Because many of the review sessions had to be canceled, what else are you guys doing to study?
by 005384106
Wed Mar 11, 2020 6:27 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Calculating Gibbs Free Energy
Replies: 6
Views: 48

Re: Calculating Gibbs Free Energy

In what situation would S(total) ever be = 0? S can only be 0 for a molecule at 0K which is theoretically unacheivable. If is is 0 between reactants and products in a reaction, that is because they had the same entropy value with opposite signs (coincidence) I just wanted to clarify to make sure I ...
by 005384106
Wed Mar 11, 2020 6:24 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction Direction
Replies: 14
Views: 83

Re: Reaction Direction

What is the reaction quotient, Q? Can you determine it by concentration values or K?
by 005384106
Wed Mar 11, 2020 6:14 pm
Forum: Balancing Redox Reactions
Topic: Half rxns
Replies: 27
Views: 156

Re: Half rxns

Do you always add the H2O at opposite ends of where you have added OH or H+?
by 005384106
Wed Mar 11, 2020 5:47 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Autoprolysis
Replies: 9
Views: 55

Re: Autoprolysis

Does autoprotolysis have to do with the donation acceptance of a hydrogen ion but amphiprotic means donation and accepting of protons, and so do acids and bases take place in amphiprotic processes?
by 005384106
Wed Mar 11, 2020 5:42 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6N.15
Replies: 2
Views: 31

Re: 6N.15

What role do the spectator ions play in this reaction?
by 005384106
Wed Mar 11, 2020 5:41 pm
Forum: Ideal Gases
Topic: Acids and Basis: Salts
Replies: 9
Views: 35

Re: Acids and Basis: Salts

When using an ICE Table, can you ever have a starting value of products, or is it always 0?
by 005384106
Wed Mar 11, 2020 5:40 pm
Forum: General Rate Laws
Topic: intermediates
Replies: 12
Views: 37

Re: intermediates

Was O2 a catalyst or an intermediate in this example?
by 005384106
Wed Mar 11, 2020 5:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle of Single Electron of A Free Radical
Replies: 4
Views: 49

Re: Bond Angle of Single Electron of A Free Radical

How do you know if you have a radical molecule?
by 005384106
Wed Mar 11, 2020 5:36 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts and Reaction Pathways
Replies: 6
Views: 25

Re: Catalysts and Reaction Pathways

Besides adding a catalyst, can increasing the temperature, increasing pressure, or decreasing volume speed up a reaction with the large activation energy?
by 005384106
Wed Mar 11, 2020 5:35 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts and Reaction Pathways
Replies: 6
Views: 25

Re: Catalysts and Reaction Pathways

Besides adding a catalyst, how else can you lower activation energy?
by 005384106
Wed Mar 11, 2020 5:32 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Pre-Equilibrium Approach
Replies: 2
Views: 16

Re: Pre-Equilibrium Approach

I also, have a question on this topic. Will we need to come up with each step or will each step be given?
by 005384106
Wed Mar 11, 2020 5:30 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Activation Energy
Replies: 7
Views: 307

Re: Activation Energy

Alternatively, when the products are at a higher point than the reactants then it is an exergonic reaction, but a large activation energy will mean that the reaction might be slower because the reaction requires more energy for the reaction to take place.
by 005384106
Wed Mar 11, 2020 4:46 pm
Forum: First Order Reactions
Topic: Determining Order
Replies: 7
Views: 30

Re: Determining Order

Does the larger the order mean that the more collisions will occur?
by 005384106
Wed Mar 11, 2020 4:43 pm
Forum: General Rate Laws
Topic: Rate of Formation vs Unique Rate
Replies: 4
Views: 80

Re: Rate of Formation vs Unique Rate

How do you determine the rate of formation?
by 005384106
Sun Mar 08, 2020 1:20 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Electromotive force (emf)
Replies: 9
Views: 76

Re: Electromotive force (emf)

Why do we measure the voltage difference of two cells?
by 005384106
Sun Mar 08, 2020 1:18 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Electromotive force (emf)
Replies: 9
Views: 76

Re: Electromotive force (emf)

How do you calculate for EMF?
by 005384106
Sun Mar 08, 2020 1:17 pm
Forum: Balancing Redox Reactions
Topic: Cathode and Anode
Replies: 16
Views: 117

Re: Cathode and Anode

Is the left side is the anode that dissolves, what happens to the right side (cathode)?
by 005384106
Sun Mar 08, 2020 1:15 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Calculating Gibbs Free Energy
Replies: 6
Views: 48

Re: Calculating Gibbs Free Energy

In what situation would S(total) ever be = 0?
by 005384106
Sun Mar 08, 2020 1:14 pm
Forum: Balancing Redox Reactions
Topic: Half rxns
Replies: 27
Views: 156

Re: Half rxns

At what point do you add elections to the half reaction?
by 005384106
Sun Mar 08, 2020 1:09 pm
Forum: Balancing Redox Reactions
Topic: Cathode and Anode
Replies: 16
Views: 117

Re: Cathode and Anode

What does the cathode and the anode do?
by 005384106
Sun Mar 08, 2020 1:08 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs free energy of formation
Replies: 2
Views: 44

Re: Gibbs free energy of formation

How do you know if you are dealing with a pure substance?
by 005384106
Tue Feb 11, 2020 9:34 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy change in constant pressure, and constant volume
Replies: 3
Views: 3245

Re: Entropy change in constant pressure, and constant volume

In what situation would you only use the R constant, 8.314 instead of multiplying the constant with a fraction?
by 005384106
Tue Feb 11, 2020 9:31 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy change in constant pressure, and constant volume
Replies: 3
Views: 3245

Re: Entropy change in constant pressure, and constant volume

Why does R need to be multiplied by 3/2 for constant volume and 5/2 for constant pressure?
by 005384106
Tue Feb 04, 2020 9:33 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work and ideal gas law
Replies: 4
Views: 29

Re: Work and ideal gas law

How do I know when I need to use the ideal gas law?
by 005384106
Tue Feb 04, 2020 9:28 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: state functions
Replies: 10
Views: 49

Re: state functions

In 4B. 9 there is a situation where no energy is transferred as heat, what does this mean if delta U = work function?
by 005384106
Tue Feb 04, 2020 9:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction Direction
Replies: 14
Views: 83

Re: Reaction Direction

I know that K represents the equilibrium constant, but what does Q represent in this situation? In this situation, Q would represent the state of the reaction at a point where equilibrium has not been reached yet. This is why they are asking about which direction the reaction will occur ("left...
by 005384106
Tue Feb 04, 2020 9:11 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: Ideal Gas Constant Hw 4B.5
Replies: 2
Views: 16

Ideal Gas Constant Hw 4B.5

How do o convert my work function -1.48125 L•atm into Juoles. I was thinking about using an ideal gas constant but I don’t have K/mol units that will cancel out so that I am left with juoles.
by 005384106
Tue Feb 04, 2020 1:21 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: -w = q
Replies: 5
Views: 48

Re: -w = q

What is the units for temperature that we use in these problems?
by 005384106
Tue Feb 04, 2020 1:20 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Change in Internal Energy
Replies: 4
Views: 1571

Re: Change in Internal Energy

will we ever need to do any conversions for units? do these problems always need to be in kJ?
by 005384106
Wed Jan 29, 2020 12:01 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 4A. 13 Homework
Replies: 2
Views: 16

4A. 13 Homework

Can someone please explain why the answer to this problem is negative instead of positive?
by 005384106
Tue Jan 28, 2020 9:32 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Heat Supplied to a system
Replies: 6
Views: 49

Re: Heat Supplied to a system

Are Cs and Cm both constants? Can I chose to use Kelvin or Celcius or do I need to use a certain unit unit of measurement in the measurement for specific head of the heat equation.
by 005384106
Tue Jan 28, 2020 12:58 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE BOX
Replies: 27
Views: 159

Re: ICE BOX

If K is 10^-3 then do you assume that x can be represented as 0.
by 005384106
Tue Jan 28, 2020 12:56 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard enthalpy of formation
Replies: 6
Views: 29

Re: Standard enthalpy of formation

During Friday’s lecture, is method 3 a way to solve for enthalpy formation by subtracting the enthalpy of products by reactants?
by 005384106
Tue Jan 28, 2020 12:54 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard enthalpy of formation
Replies: 6
Views: 29

Re: Standard enthalpy of formation

As Lavelle talked about in lecture, Why is graphite the most stable form of carbon?
by 005384106
Tue Jan 28, 2020 12:22 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 11
Views: 44

Re: Bond Enthalpies

For Friday’s lecture when we talked about bond enthalpies, are the energy values for each product and reactant going to be given? How can we solve for these values?
by 005384106
Tue Jan 28, 2020 12:12 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: salt solutions
Replies: 4
Views: 24

Re: salt solutions

Are there any salts that can strongly affect pH? Or do most salts have no affect on pH?
by 005384106
Tue Jan 28, 2020 12:11 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: salt solutions
Replies: 4
Views: 24

Re: salt solutions

In class we talked about how HCl and NaOH when mixed make NaCl which neutralizes a solution. What are other examples of this?
by 005384106
Tue Jan 28, 2020 12:05 pm
Forum: General Science Questions
Topic: Coordination Compounds
Replies: 7
Views: 104

Re: Coordination Compounds

What are all of the coordination compounds that we should look at besides cisplatin and hemoglobin?
by 005384106
Tue Jan 28, 2020 11:55 am
Forum: Phase Changes & Related Calculations
Topic: State Property
Replies: 6
Views: 33

Re: State Property

What is the difference between boiling an melting point?
by 005384106
Thu Jan 23, 2020 12:30 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Buffers
Replies: 3
Views: 42

Re: Buffers

Can someone please explain in what situations we would need to solve calculations for a buffer?
by 005384106
Thu Jan 23, 2020 12:27 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: pH sig figs
Replies: 9
Views: 34

Re: pH sig figs

does the amount of significant figures for the molar concentration determine the amount of significant figures used after the decimal place of a pH?
by 005384106
Thu Jan 23, 2020 12:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Best Way To Study?
Replies: 13
Views: 84

Re: Best Way To Study?

I find making flash cards helps me understand concepts and memorize them easier.
by 005384106
Thu Jan 23, 2020 12:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Converting from Kp to Kc
Replies: 4
Views: 22

Re: Converting from Kp to Kc

How can there be different values for Kc and Kp if they are both equilibrium constants of a reaction?
by 005384106
Thu Jan 23, 2020 12:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Converting from Kp to Kc
Replies: 4
Views: 22

Re: Converting from Kp to Kc

What is the difference of Kp and Kc?
by 005384106
Mon Jan 13, 2020 6:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc and Kp
Replies: 8
Views: 48

Re: Kc and Kp

Why aren’t solids and liquids included in the equilibrium constant?
by 005384106
Sun Jan 12, 2020 11:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Types of Equilibrium Constants
Replies: 7
Views: 36

Re: Types of Equilibrium Constants

In what instances would the state of a molecule be important? (gaseous, aqueous, solid, or liquid)
by 005384106
Sun Jan 12, 2020 11:17 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K (eq constant) vs k (rate constant)?
Replies: 3
Views: 26

Re: K (eq constant) vs k (rate constant)?

How can a solution reach equilibrium?
by 005384106
Sun Jan 12, 2020 11:12 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction Direction
Replies: 14
Views: 83

Re: Reaction Direction

I am confused with the equilibrium ratio when using molarity values compared to the equilibrium ratio using partial pressure. Can someone please explain this to me. Thank you
by 005384106
Sun Jan 12, 2020 9:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction Direction
Replies: 14
Views: 83

Re: Reaction Direction

How do you solve for Q in this situation?
by 005384106
Sun Jan 12, 2020 9:30 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction Direction
Replies: 14
Views: 83

Re: Reaction Direction

I know that K represents the equilibrium constant, but what does Q represent in this situation?
by 005384106
Sun Dec 08, 2019 11:13 am
Forum: Identifying Acidic & Basic Salts
Topic: salt solutions
Replies: 6
Views: 64

Re: salt solutions

Do the salts always need to have the involvement of the sodium ion?
by 005384106
Sun Dec 08, 2019 11:12 am
Forum: Polyprotic Acids & Bases
Topic: Polyproptic Acids/Bases
Replies: 4
Views: 49

Re: Polyproptic Acids/Bases

Are the hydrogen protons the polyprotic acids that are donated?
by 005384106
Sun Dec 08, 2019 11:11 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: how the bond works
Replies: 1
Views: 52

Re: how the bond works

“How can you predict the number of bonding sites for a given cation?”

I think the lone pairs of a cation will allow for the bonding site of an anion.
by 005384106
Sun Dec 08, 2019 11:09 am
Forum: Biological Examples
Topic: b12?
Replies: 3
Views: 73

Re: b12?

I think it’s just that cobalt is water soluble and helps metabolism of the vitamin into your nervous system.
by 005384106
Sun Dec 08, 2019 11:07 am
Forum: Lewis Acids & Bases
Topic: respiratory acidosis
Replies: 2
Views: 49

Re: respiratory acidosis

Respiratory acidosis is a condition that occurs when the lungs can't remove enough of the carbon dioxide (CO2) produced by the body. Excess CO2 causes the pH of blood and other bodily fluids to decrease, making them too acidic. ... Oxygen passes from the lungs into the blood. CO2 passes from the blo...
by 005384106
Sun Dec 08, 2019 11:06 am
Forum: Air Pollution & Acid Rain
Topic: acid rain
Replies: 2
Views: 57

Re: acid rain

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as ...
by 005384106
Sun Dec 08, 2019 11:04 am
Forum: General Science Questions
Topic: Last minute tips
Replies: 2
Views: 104

Re: Last minute tips

I always like to look over my tests and nock out the easiest questions before I answer the harder ones. That was I make sure I get some good points.
by 005384106
Sun Dec 08, 2019 11:03 am
Forum: General Science Questions
Topic: Last minute tips
Replies: 2
Views: 104

Re: Last minute tips

Make sure you know the biological functions of transition metals and important ligands (I think they’re ligands: Vitiman B 12, Cisplatin, Myoglobin, Hemoglobin)
by 005384106
Sun Dec 08, 2019 11:01 am
Forum: Biological Examples
Topic: Heme complex
Replies: 5
Views: 69

Re: Heme complex

So Fe cation bonds to O2? Is this what allows the more than one complexes to be bonded?
by 005384106
Sun Dec 08, 2019 10:59 am
Forum: Hybridization
Topic: 2sp2 and sp2
Replies: 10
Views: 81

Re: 2sp2 and sp2

I think sp2 is fine. The 2 at the beginning only clarifies the energy level.
by 005384106
Sun Dec 08, 2019 10:56 am
Forum: Biological Examples
Topic: chelate
Replies: 2
Views: 43

Re: chelate

a compound containing a ligand (typically organic) bonded to a central metal atom at two or more points.
by 005384106
Sun Dec 08, 2019 10:54 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs linear
Replies: 56
Views: 444

Re: Bent vs linear

Katherine Chhen 3I wrote:What about AX2E3 since it is linear and not bent?


You cannot have all 3 electrons together because there would be a lot of electron electron repulsion, therefore 2 electrons and one electron would repel from the 2 atoms and allow for this linear shape
by 005384106
Sun Dec 08, 2019 10:50 am
Forum: Conjugate Acids & Bases
Topic: Finding Conjugate A and B
Replies: 4
Views: 52

Re: Finding Conjugate A and B

I also learned that your conjugate acid is the one that looks the most similar to your base. And vice versa
by 005384106
Sun Dec 08, 2019 10:48 am
Forum: Naming
Topic: Naming
Replies: 7
Views: 70

Re: Naming

Would we also use these prefixes if we were using oxalato?
by 005384106
Sun Dec 08, 2019 10:45 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: Hydrogen bonding
Replies: 3
Views: 45

Re: Hydrogen bonding

A hydrogen bond is the bond between a hydrogens atom and an N, O, or F atom. You can create intermolecular hydrogen bond by binding one of these atoms from one molecule, with an oxygen from another molecule.
by 005384106
Mon Nov 18, 2019 6:32 pm
Forum: Hybridization
Topic: Hybridization
Replies: 6
Views: 44

Re: Hybridization

Does hybridization depend on the number of bonds between atoms?
by 005384106
Mon Nov 18, 2019 6:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing the Lewis Structure of N20 (2E.13d)
Replies: 5
Views: 39

Re: Drawing the Lewis Structure of N20 (2E.13d)

This was very helpful in helping me determine when you make double bonds/ triple bonds/ single bonds.
by 005384106
Mon Nov 18, 2019 5:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E1 - Molecules with bent geometry
Replies: 7
Views: 59

Re: 2E1 - Molecules with bent geometry

What is the difference between lone-lone pair repulsion, lone-bonding pair repulsion, and bonding- bonding pair repulsion? I thought there was only repulsion differences of 2 types such as a lone pair electron pair and an atom.
by 005384106
Fri Nov 15, 2019 9:19 am
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E1 - Molecules with bent geometry
Replies: 7
Views: 59

Re: 2E1 - Molecules with bent geometry

Do lone pair electrons have a stronger force of repulsion of atoms compared to the strength of atoms repelling against each other?
by 005384106
Fri Nov 15, 2019 9:17 am
Forum: Lewis Structures
Topic: Lewis acids and bases?
Replies: 7
Views: 50

Re: Lewis acids and bases?

Is it possible for an acid/base molecule to be covalent?
by 005384106
Fri Nov 15, 2019 9:16 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Indeterminacy Equation
Replies: 6
Views: 110

Re: Heisenberg Indeterminacy Equation

The Heisenberg uncertainty principle states that it is impossible to know simultaneously the exact position and momentum of a particle. So the more defined the position is determined, the momentum is less known, and vice versa.
by 005384106
Fri Nov 15, 2019 9:11 am
Forum: Lewis Structures
Topic: Polar and Non polar covalent bonds in lewis structures
Replies: 5
Views: 28

Re: Polar and Non polar covalent bonds in lewis structures

How do you identify the partial charge in a compound?
by 005384106
Fri Nov 15, 2019 9:11 am
Forum: Lewis Structures
Topic: Polar and Non polar covalent bonds in lewis structures
Replies: 5
Views: 28

Re: Polar and Non polar covalent bonds in lewis structures

How do you know if a molecule is polar covalent or non polar?
by 005384106
Fri Nov 01, 2019 12:13 pm
Forum: Coordinate Covalent Bonds
Topic: Distinguishing a coordinate covalent bond
Replies: 5
Views: 52

Re: Distinguishing a coordinate covalent bond

How do you know when an atom has more covalent character?
by 005384106
Fri Nov 01, 2019 11:42 am
Forum: Bond Lengths & Energies
Topic: Lattice Energy
Replies: 9
Views: 53

Re: Lattice Energy

Have we ever been asked questions about solving for lattice energy? Or is it just a concept? If we can solve for it how would we do that?
by 005384106
Fri Nov 01, 2019 11:32 am
Forum: Octet Exceptions
Topic: More than 8 valence e-
Replies: 8
Views: 71

Re: More than 8 valence e-

This is a question: so in high school I thought all atoms had 2 electrons in the first sub shell, and in all of the next sub shells the valence electrons were 8. So do all atoms that have a d orbital are able to have more than 8 electrons in a Sub shell?
by 005384106
Fri Nov 01, 2019 11:21 am
Forum: Lewis Structures
Topic: Central atom
Replies: 6
Views: 33

Re: Central atom

When drawing lewis structures, you should look at the compound and notice where the atoms are placed on the electron negativity scale. The least electronegative atom is usually your central atom. However there are exceptions such as noble cases. Also sometimes the least moles of the atom in the comp...
by 005384106
Fri Nov 01, 2019 11:07 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Writing electron configuration
Replies: 7
Views: 57

Re: Writing electron configuration

When writing electron configuration you need to write it in numerical order. So the correct answer would be 3d 4s. :)
by 005384106
Fri Oct 25, 2019 1:53 pm
Forum: Ionic & Covalent Bonds
Topic: Resonance
Replies: 7
Views: 50

Re: Resonance

005384106 wrote:Why does sulfur have a double bond in the Lewis structure instead of leaving the electrons as valence electrons?


I am referring to this problem that we did during lecture.
by 005384106
Fri Oct 25, 2019 1:52 pm
Forum: Ionic & Covalent Bonds
Topic: Resonance
Replies: 7
Views: 50

Re: Resonance

Why does sulfur have a double bond in the Lewis structure instead of leaving the electrons as valence electrons?
by 005384106
Fri Oct 25, 2019 1:51 pm
Forum: Ionic & Covalent Bonds
Topic: Resonance
Replies: 7
Views: 50

Re: Resonance

I didn’t understand why oxygen received a negative charge instead of silver. Can someone please explain this to me?
by 005384106
Fri Oct 25, 2019 12:30 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 2003

Re: Rydberg equation [ENDORSED]

In what kinds of scenarios or questions would we need to use the Rydberg equation? You use the Rydberg equation in scenarios where electrons are moving to different energy levels, or for solving the amount of energy is present on an energy level. Both scenarios are different equations using the R u...
by 005384106
Fri Oct 25, 2019 12:28 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 2003

Re: Rydberg equation [ENDORSED]

I have seen different equations for solving problems about electrons moving to different energy levels using the Rydberg equation and I was wondering what is the correct value of R?
by 005384106
Fri Oct 25, 2019 12:24 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy
Replies: 4
Views: 53

Re: Ionization Energy

Why is there more energy the farther an atom is from a nucleus?
by 005384106
Sun Oct 20, 2019 4:26 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin
Replies: 3
Views: 41

Re: Spin

Why do electrons “spin”? And what does the spin (up/down) represent?
by 005384106
Sun Oct 20, 2019 4:24 pm
Forum: Properties of Electrons
Topic: Equations for Test
Replies: 9
Views: 87

Re: Equations for Test

What does. kinetic energy represent?
by 005384106
Sun Oct 20, 2019 4:22 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 9
Views: 58

Re: Quantum Numbers

Can I clarify why the n is always less that 1 of l.
by 005384106
Sun Oct 20, 2019 4:21 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 9
Views: 58

Re: Quantum Numbers

Does l represent energy level?
by 005384106
Sun Oct 20, 2019 4:19 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 9
Views: 58

Re: Quantum Numbers

How does an atoms energy level relate to n and l?
by 005384106
Sun Oct 06, 2019 8:27 pm
Forum: Limiting Reactant Calculations
Topic: limiting reactant
Replies: 9
Views: 92

Re: limiting reactant

I have found it easiest to find the limiting reactant by solving for how much product can be produced. This can be used by solving for the amount of moles there are of each reactant and using the molar ratio to solve for the grams of a product and whichever reactant produces the smaller amount of pr...
by 005384106
Sun Oct 06, 2019 8:23 pm
Forum: SI Units, Unit Conversions
Topic: 50 Min test
Replies: 4
Views: 53

Re: 50 Min test

On Wednesday I have my first test. I was wondering if questions about the quantum section will be asked or is it just a question about fundamentals/high school chem
by 005384106
Sun Oct 06, 2019 8:12 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Reactions
Replies: 25
Views: 342

Re: Balancing Reactions

The law of conservation of mass refers to chemical reactions, which is why in nuclear reactions, this is not true. The law states that in a chemical reaction, the total mass of the reactants must equal the total mass of the products. This means that matter cannot be created or destroyed, and so the ...
by 005384106
Sun Oct 06, 2019 8:00 pm
Forum: Empirical & Molecular Formulas
Topic: E15 Homework Problem
Replies: 3
Views: 60

Re: E15 Homework Problem

First, you need to find which metal element is represented by M in the given compound. You can do this by subtracting the mass of the hydrogen and the oxygens from the molar mass given. 74.10 - ( 2x1.008+2x15.999) =39.94 g/mol Now using the periodic table you will be able to see that the element wit...

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