## Search found 100 matches

Sat Mar 14, 2020 5:45 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Order of Reactions
Replies: 4
Views: 55

### Re: Order of Reactions

How exactly does a reactant have an order as compared to an overall reaction order?
Sat Mar 14, 2020 5:42 pm
Forum: Second Order Reactions
Topic: Termolecular
Replies: 15
Views: 427

### Re: Termolecular

How does having three reactants affect the rate law?
Sat Mar 14, 2020 5:38 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation energy
Replies: 7
Views: 55

### Re: Activation energy

How does a catalyst affect the activation energy?
Sat Mar 14, 2020 5:35 pm
Forum: Zero Order Reactions
Topic: Elementary Reactions
Replies: 5
Views: 89

### Re: Elementary Reactions

Do coefficients play a role in elementary reactions??
Sat Mar 14, 2020 5:22 pm
Forum: First Order Reactions
Topic: k versus k prime
Replies: 6
Views: 92

### Re: k versus k prime

Is k and k' related to each other since one is the rate of the forward reaction and the other is the rate of the reverse reaction?
Sat Mar 14, 2020 5:21 pm
Forum: *Enzyme Kinetics
Topic: Heterogeneous catalyst
Replies: 3
Views: 62

### Re: Heterogeneous catalyst

What does an heterogeneous catalyst mean?
Sat Mar 14, 2020 5:20 pm
Forum: General Rate Laws
Topic: half life
Replies: 5
Views: 58

### Re: half life

Based on the half-life you calculated in order to get to get to 1/4 or say 1/6 you would double or triple the half-life you got.
Sun Mar 01, 2020 10:05 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6M.5
Replies: 3
Views: 52

### Re: 6M.5

follow up for this question.. what would be the number of moles to obtain delta G? The number of moles involved for calculating the delta G (n) is the moles of electrons transferred overall. Be sure the electrons used in the reduction half reaction and the oxidation half reaction are the same. If n...
Sun Mar 01, 2020 10:03 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cells
Replies: 10
Views: 79

### Re: Galvanic Cells

If the galvanice cell ever reaches zero this means that the battery has died out and that there is no electron transfer occurring because the E(cathode) is equal to the E(anode).
Sun Mar 01, 2020 10:01 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: test 2 topics
Replies: 11
Views: 83

### Re: test 2 topics

Basically all of electrochemistry and the equation of Gibbs free energy involving cell potential.
Sun Mar 01, 2020 10:00 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Electrochemical Series
Replies: 5
Views: 46

### Re: Electrochemical Series

Electrochemical series is the table we use to find the cell potential of half reactions.
Sun Mar 01, 2020 9:58 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Writing cell diagrams
Replies: 7
Views: 70

### Re: Writing cell diagrams

If 2 species are in the same phase you separate them using a comma and if they are in different lashes you separate them using a single vertical line (|).
Sun Mar 01, 2020 9:52 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: How to determine anode and cathode in 6.57?
Replies: 6
Views: 57

### Re: How to determine anode and cathode in 6.57?

The cathode should be the one with the larger E value.
Sun Mar 01, 2020 9:42 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell potential
Replies: 15
Views: 119

### Re: cell potential

If the cell potential for a reaction is positive that means that delta G is negative meaning the reaction is spontaneous.
Sun Mar 01, 2020 9:40 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Oxidation Numbers
Replies: 5
Views: 34

### Re: Oxidation Numbers

The n is the number of moles of electrons being transferred within a redox reaction. The oxidation numbers for oxygen (O2) is -2 and for (O) it’s -1. Hydrogen is always +1 and you should also consider the overall charge of the molecule when assigning oxidation numbers.
Sun Mar 01, 2020 9:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Salt Bridge
Replies: 12
Views: 107

### Re: Salt Bridge

The salt bridge is put into place so as the balance out the charges within the cathode and the anode. By doing so you arre able to prolong the transfer of electrons
Sun Mar 01, 2020 9:34 pm
Forum: Balancing Redox Reactions
Topic: Cell Diagrams
Replies: 14
Views: 125

### Re: Cell Diagrams

Typically when writing a cell diagram the cathode (reduction) goes on the right and the anode (oxidation) goes on the left. Metals are typically placed on the outskirts of the cell diagram as well.
Mon Feb 17, 2020 2:41 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Constant R
Replies: 15
Views: 263

### Re: Constant R

What circumstances should we use the difference values of R?
Mon Feb 17, 2020 2:40 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated Systems.
Replies: 5
Views: 149

### Re: Isolated Systems.

How does one determine a system is isolated and what does that tell us about its volume and pressure?
Mon Feb 17, 2020 2:38 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Open Systems
Replies: 6
Views: 145

### Re: Open Systems

How does one determine whether a system is open and what does that say about pressure and volume?
Mon Feb 17, 2020 2:19 pm
Forum: Phase Changes & Related Calculations
Topic: Negative Work
Replies: 18
Views: 301

### Re: Negative Work

What does it mean when we have negative work?
Mon Feb 17, 2020 2:18 pm
Forum: Phase Changes & Related Calculations
Topic: Phase changes
Replies: 8
Views: 164

### Re: Phase changes

What calculation do we also have to incorporate when going from a gas to a liquid or vice versa?
Mon Feb 17, 2020 1:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Buffer Solution
Replies: 4
Views: 85

### Re: Buffer Solution

What exactly does a bufffer solution do and how do they relate to strong or weak acid and bases.
Mon Feb 17, 2020 1:55 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Decreasing pressure
Replies: 7
Views: 148

### Re: Decreasing pressure

In retrospect by decreasing pressure you are increasing volume since P and V are inversely related to each other. By increasing the volume you essentially have more space for gas to move about, therefore, favoring the side with more moles of gas.
Mon Feb 17, 2020 1:53 pm
Forum: Ideal Gases
Topic: pv=nrt
Replies: 19
Views: 244

### Re: pv=nrt

Why and how are we able to equal nRT to work?
Mon Feb 17, 2020 1:50 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Cv vs Cp
Replies: 17
Views: 274

### Re: Cv vs Cp

Cv is used for constant volume and Cp is used for constant pressure.
Sun Feb 16, 2020 2:27 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Joules or KJ?
Replies: 14
Views: 203

### Re: Joules or KJ?

Why does entropy and enthalpy have different units?
Sun Feb 16, 2020 2:15 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: spontaneity
Replies: 34
Views: 636

### Re: spontaneity

Why exactly does delta G have to be negative to be considered spontaneous?
Sun Feb 16, 2020 2:09 pm
Forum: Calculating Work of Expansion
Topic: work = 0
Replies: 14
Views: 237

### Re: work = 0

Under what conditions does work equal zero?
Sun Feb 16, 2020 2:04 pm
Forum: Balancing Redox Reactions
Topic: oxidation vs reduction
Replies: 19
Views: 237

### Re: oxidation vs reduction

How do you determine an elements oxidation number ?
Sun Feb 02, 2020 11:34 pm
Forum: Calculating Work of Expansion
Topic: Internal energy
Replies: 5
Views: 38

### Re: Internal energy

Why can’t U be the internal energy of an open system?
Sun Feb 02, 2020 11:32 pm
Forum: Calculating Work of Expansion
Topic: Work
Replies: 4
Views: 33

### Re: Work

How do we know whether work is positive or negative?
Sun Feb 02, 2020 11:31 pm
Forum: Calculating Work of Expansion
Topic: reversible expansion
Replies: 6
Views: 48

### Re: reversible expansion

How would we know on the exam if something is reversible or irreversible ?
Sun Feb 02, 2020 11:28 pm
Forum: Calculating Work of Expansion
Topic: Enthalpy
Replies: 5
Views: 29

### Re: Enthalpy

I remember that enthalpy(delta H) is the same as q, can someone explain this?
Sun Feb 02, 2020 11:25 pm
Forum: Calculating Work of Expansion
Topic: piston diagram
Replies: 2
Views: 36

### Re: piston diagram

I’m not exactly sure what a piston is and how that works in the diagram.
Sun Feb 02, 2020 11:24 pm
Forum: Calculating Work of Expansion
Topic: Integrals
Replies: 4
Views: 41

### Re: Integrals

Can someone explain why we need to take the integral with bounds being the initial and final volume ?
Sun Jan 26, 2020 4:22 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity
Replies: 7
Views: 85

### Re: Heat Capacity

How do we know the heat capacity also how does heat transfer of energy work?
Sun Jan 26, 2020 4:08 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy w/ Temp
Replies: 6
Views: 63

### Re: Enthalpy w/ Temp

How do we tell with enthalpy that a reaction is exothermic or endothermic?
Sun Jan 26, 2020 3:59 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy & Spontaneity
Replies: 4
Views: 47

### Re: Enthalpy & Spontaneity

What exactly is the concept of spontaneity and how does it relate to enthalpy?
Sun Jan 26, 2020 3:11 pm
Forum: Phase Changes & Related Calculations
Topic: Phase changes: endothermic vs exothermic
Replies: 12
Views: 169

### Re: Phase changes: endothermic vs exothermic

Why would the reverse reaction of vaporization, melting and sublimation be exothermic?
Mon Jan 20, 2020 12:20 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Replies: 7
Views: 61

Does adding a catalyst affect the K since it reaches equilibrium at a faster rate?
Mon Jan 20, 2020 12:10 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatelier Principle
Replies: 4
Views: 62

### Re: Le Chatelier Principle

A change in pressure or concentration only effects the direction the reaction is going because it will shift in direction to maintain equilibrium. However, a change in temperature effects the rates the reactions are occurring, thus, effecting the K value.
Mon Jan 20, 2020 11:56 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Weak acids & bases
Replies: 7
Views: 58

### Re: Weak acids & bases

Gerald Bernal1L wrote:you divide the change number by the concentration of the acid. Then you multiply by 100 if you want the percent.

What exactly is the change number as mentioned in the above quote ?
Mon Jan 20, 2020 11:54 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatliers Principle In relation to pressure
Replies: 6
Views: 48

### Re: Le Chatliers Principle In relation to pressure

How does Le Chatliers Principle apply to the concept of pressure?
Mon Jan 20, 2020 11:52 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Replies: 9
Views: 120

An inert gas is basically a noble gas where the ones we will most likely see in reactions are He or Ar.
Wed Jan 08, 2020 6:48 pm
Forum: Ideal Gases
Topic: K and Q
Replies: 8
Views: 470

### Re: K and Q

How exactly is the Q different from K if they are calculated the same way?
Wed Jan 08, 2020 6:44 pm
Forum: Ideal Gases
Topic: kc vs kp
Replies: 19
Views: 852

### Re: kc vs kp

Kp is used, specifically, if the partial pressure of the reactants and products are given and the Kc is used if the concentration of the reactants and products are given.
Wed Jan 08, 2020 6:35 pm
Forum: Ideal Gases
Topic: R constant in PV=nRT
Replies: 9
Views: 68

### Re: R constant in PV=nRT

I believe the constant will be given to us in the constant sheet so what don't really need to worry about it.
Wed Jan 08, 2020 6:29 pm
Forum: Ideal Gases
Topic: K
Replies: 10
Views: 97

### Re: K

I'm not sure if the constant Kc will be the same as Kp but I do know that they are used on whether you were given concentrations or if you were given partial pressures.
Wed Jan 08, 2020 5:53 pm
Forum: Ideal Gases
Topic: Units for Pressure
Replies: 6
Views: 73

### Re: Units for Pressure

What is the difference between the bar unit and the atm unit for pressure?
Wed Jan 08, 2020 5:37 pm
Forum: Ideal Gases
Topic: Dynamic Equilibrium
Replies: 10
Views: 116

### Re: Dynamic Equilibrium

Does dynamic equilibrium mean that the reaction is constantly going through the forward and reverse reaction since the reactants make the products and the products can make the reactants?
Sun Dec 08, 2019 5:00 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: polydentate
Replies: 4
Views: 158

### Re: polydentate

How can a molecule bind in more than one area? Is it because there are elements that have lone pairs on them?
Sun Dec 08, 2019 4:57 pm
Forum: Naming
Topic: bis,tris,tetrakis
Replies: 6
Views: 134

### Re: bis,tris,tetrakis

Why exactly do we need to use these different prefixes as compared to using di, tri, tetra?
Sun Dec 08, 2019 4:56 pm
Forum: Biological Examples
Topic: en and edta
Replies: 5
Views: 127

### Re: en and edta

For en and edta are expected to know the chemical formula in its entirety?
Sun Dec 08, 2019 4:55 pm
Forum: Biological Examples
Topic: Heme complex
Replies: 5
Views: 128

### Re: Heme complex

How many Oxygen does it take to make hemoglobin?
Sun Dec 08, 2019 4:54 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: chelating ligands [ENDORSED]
Replies: 21
Views: 6235

### Re: chelating ligands[ENDORSED]

What exactly is a chelating ligand? Can you also provide an example for it?
Wed Nov 27, 2019 1:20 am
Forum: Naming
Topic: Bis,tris, etc
Replies: 6
Views: 75

### Re: Bis,tris, etc

When exactly do we use bis, cis, tris, etc.? How are they any different from using the other prefixes such as di, tri, etc.?
Wed Nov 27, 2019 1:17 am
Forum: Naming
Topic: Naming coordination compound
Replies: 5
Views: 76

### Re: Naming coordination compound

When a molecule has en in it, for example, [CoCl2(en)2]+ what does it mean exactly? Does this also have an effect on the charge of the compound?
Wed Nov 27, 2019 1:15 am
Forum: Naming
Topic: Naming Coordination Compound
Replies: 5
Views: 48

### Re: Naming Coordination Compound

If the overall coordination sphere has a negative charge does it have an effect on the nomenclature on the compound?
Wed Nov 27, 2019 1:13 am
Forum: Sigma & Pi Bonds
Topic: Sigma and Pi Bonds
Replies: 7
Views: 98

### Re: Sigma and Pi Bonds

Can we tell what hybridization state an element has if they have a sigma bond?
Wed Nov 27, 2019 1:12 am
Forum: Sigma & Pi Bonds
Topic: Pi Bonding
Replies: 6
Views: 88

### Re: Pi Bonding

Can we tell what type of hybridization state an element has if they have a pi bond?
Wed Nov 27, 2019 1:11 am
Forum: Naming
Topic: Naming Coordination Compound
Replies: 5
Views: 48

### Re: Naming Coordination Compound

Do anions and cations outside of the coordination sphere need prefixes when we write out the name ?
Wed Nov 27, 2019 1:08 am
Forum: Naming
Topic: Naming Coordination Compound
Replies: 5
Views: 48

### Re: Naming Coordination Compound

When naming a coordination compound, do we put the molecule outside of the coordination sphere before or after the name? Typically if whatever is outside of the sphere is a cation then it goes before the name but if it is an anion then you would just write it after the name. So K4[Ni(CN)4] would be...
Wed Nov 27, 2019 1:03 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: brackets
Replies: 13
Views: 142

### Re: brackets

If an anion comes after the brackets does it affect the nomenclature of the compound, if so how?
Wed Nov 27, 2019 1:02 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: brackets
Replies: 13
Views: 142

### Re: brackets

If there is a cation in front of the brackets does that affect the nomenclature of the compound, if so how?
Wed Nov 27, 2019 12:58 am
Forum: Sigma & Pi Bonds
Topic: Pi Bonding
Replies: 6
Views: 88

### Re: Pi Bonding

When we were drawing out how the pi bonds looked on molecules, we drew two regions for the pi (one on top of the molecule and one on the bottom) but this only represented a single pi bond and not two, can someone explain the logic behind this?
Wed Nov 27, 2019 12:55 am
Forum: Ionic & Covalent Bonds
Topic: Dative Covalent Bonding
Replies: 4
Views: 141

### Dative Covalent Bonding

What exactly is dative bonding? I know that its a type of binding between transitional metals and ligands but what exactly does it entail?
Mon Nov 25, 2019 5:09 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate Covalent Bonds
Replies: 5
Views: 223

### Re: Coordinate Covalent Bonds

What is the significance of the coordinate covalent bonds? Are these bonds involved in lewis acids and bases?
Mon Nov 25, 2019 5:05 pm
Forum: Dipole Moments
Topic: Dipole Moment
Replies: 10
Views: 253

### Re: Dipole Moment

How do we tell there is a major difference in electronegativity to cause dipole-moments? Is there a specific range or even an electronegativity chart being given?
Mon Nov 25, 2019 1:13 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Calculating formal charge
Replies: 8
Views: 203

### Re: Calculating formal charge

When calculating formal charge the order doesn't matter because each element has there own formal charge. This is calculated through subtracting the number of bonds a lone pair electrons from the valence electron of that given element. As for adding the charges at the end, the only thing you should ...
Mon Nov 25, 2019 1:06 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 5
Views: 182

### Re: Resonance

Laura WM 3I wrote:It it better to have 2 formal charges of -1 or 1 formal charge of -2?

This depends on the element itself. If one element is more electronegative compared to the other then you should place the negative charge on the element with the higher electronegativity.
Mon Nov 25, 2019 12:56 pm
Forum: Dipole Moments
Topic: Dipole Induced- Dipole Induced
Replies: 13
Views: 298

### Re: Dipole Induced- Dipole Induced

Why exactly are there induced dipoles? Is it simply because the molecule would just be more stable if it were bonded or is there another factor that is playing in this?
Mon Nov 25, 2019 12:50 pm
Forum: Sigma & Pi Bonds
Topic: sigma and pi bonds
Replies: 19
Views: 435

### Re: sigma and pi bonds

Pi bonds prevent the molecule from rotating, is this because it is formed from a double bond (one sigma and one pi)?
Mon Nov 25, 2019 12:39 pm
Forum: Trends in The Periodic Table
Topic: Electronegativity
Replies: 9
Views: 244

### Re: Electronegativity

I know that the trend of electronegativity increases as you go up and to the right, however, in the case of oxygen and chlorine which one has a higher electronegativity and what aspect of that element makes it so?
Mon Nov 25, 2019 12:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs linear
Replies: 56
Views: 1129

### Re: Bent vs linear

While both molecular geometry's do have two bonds connected to the central the main thing to consider is if there are any lone pairs on the central atom as well. There are two instances when it can be considered linear; one way is when there are only two bonds to the central atom and no lone pairs, ...
Mon Nov 25, 2019 9:42 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs linear
Replies: 56
Views: 1129

### Re: Bent vs linear

Can we refer to bent as angular or v-shaped as well or are we limited to just saying bent for exams?
Sun Nov 24, 2019 7:19 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: dipole-dipole vs induced dipole
Replies: 9
Views: 107

### Re: dipole-dipole vs induced dipole

Why is the molecule OCS is considered polar,shouldn't their dipoles cancel out making the molecule non-polar?
Sun Nov 24, 2019 7:16 pm
Forum: Hybridization
Topic: Hybridization
Replies: 3
Views: 45

### Re: Hybridization

In class, we used Carbon as an example to understand hybridization since it can adopt all types of hybridization (sp3, sp2, and sp1). Can someone explain why that is?
Sun Nov 24, 2019 7:13 pm
Forum: Sigma & Pi Bonds
Topic: Sigma & Pi Bonds
Replies: 9
Views: 131

### Re: Sigma & Pi Bonds

Why is it that the sigma is the first bond to always form and not the pi bond?
Sun Nov 24, 2019 7:13 pm
Forum: Sigma & Pi Bonds
Topic: Sigma & Pi Bonds
Replies: 9
Views: 131

### Re: Sigma & Pi Bonds

What is the bond between an s-orbital and an s-orbital called?
Sun Nov 24, 2019 7:11 pm
Forum: Determining Molecular Shape (VSEPR)
Replies: 4
Views: 46

### Re: Radicals and Molecular Shape

What exact factors of the VSPER model helps us determine the shape/orientation of molecules?
Sun Nov 10, 2019 6:33 pm
Forum: Dipole Moments
Topic: Dipoles Cancelling Out
Replies: 4
Views: 62

### Re: Dipoles Cancelling Out

DarrenKim_3G wrote:I believe cancelling out has to do with the symmetry of a molecule. For example C2Cl4 has no net dipole moment because the molecule is symmetric so the moment cancels out

When you say symmetric what does that exactly refer too, perhaps the shape of the element?
Sun Nov 10, 2019 6:21 pm
Forum: Dipole Moments
Topic: Boiling Point
Replies: 11
Views: 136

### Re: Boiling Point

How can we determine between elements which will have a higher boiling point?
Sun Nov 10, 2019 6:15 pm
Forum: Dipole Moments
Topic: Polarity
Replies: 8
Views: 70

### Re: Polarity

Is there another way besides drawing out an element to determine the polarity?
Sun Nov 10, 2019 6:04 pm
Forum: Dipole Moments
Topic: HYDROGEN BONDING
Replies: 3
Views: 32

### Re: HYDROGEN BONDING

In terms of covalent, ionic, and hydrogen bonds which is the strongest and why? I would think ionic but I can see how hydrogen bonds are stronger since they are easily attracted to high electronegative elements.
Sun Nov 10, 2019 5:57 pm
Forum: Dipole Moments
Topic: Dipole Moment
Replies: 6
Views: 47

### Re: Dipole Moment

When Lavelle was drawing the water molecule to show the dipole moment why did he put the arrows pointing toward the oxygen? Is it because of oxygen's higher electronegativity?
Wed Oct 30, 2019 11:13 am
Forum: Coordinate Covalent Bonds
Topic: Why can h20 only donate 1 lone pair?
Replies: 5
Views: 787

### Re: Why can h20 only donate 1 lone pair?

D-nice1D wrote:I think that would lead to the oxygen having a 2+ formal charge

Adding on, Oxygen has a high electronegativity so having a formal charge of 2+ is not ideal.
Wed Oct 30, 2019 11:10 am
Forum: Octet Exceptions
Topic: List of Octet exceptions
Replies: 6
Views: 112

### Re: List of Octet exceptions

Is there a limit on the number of electrons the exceptions to the octet rule can have?
Wed Oct 30, 2019 11:08 am
Forum: Resonance Structures
Topic: Delocalization vs. Resonance
Replies: 8
Views: 406

### Re: Delocalization vs. Resonance

So in terms of delocalization can we say this occurs when atoms form bonds with each other because in a way they are spreading out their electrons through sharing them?
Wed Oct 30, 2019 11:03 am
Forum: Ionic & Covalent Bonds
Topic: Ionic Bonds
Replies: 6
Views: 62

### Ionic Bonds

Just for clarification, ionic bonds are formed between elements that are further from each other due to a substantial difference in their electronegativity?
Sun Oct 27, 2019 10:10 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Constant
Replies: 3
Views: 54

### Heisenberg Constant

Why is that when we learned about the Heisenberg uncertainty principle the principle was h/4*pi but in the textbook, they referred to the constant as h/2.
Sun Oct 27, 2019 10:07 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8034
Views: 1407658

### Re: Post All Chemistry Jokes Here

Q: What's the best thing to learn about equilibrium?
A: Nothing changes.
Sun Oct 27, 2019 10:06 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8034
Views: 1407658

### Re: Post All Chemistry Jokes Here

Q: Why didn't Na and Cl relationship workout?
A: Because they were salty together.
Sun Oct 27, 2019 10:04 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelength Plausibility
Replies: 31
Views: 1443

### Re: Wavelength Plausibility

APatel_4A wrote:He said that it is 720 to 400 but that we can just remember 700 to 400 since it's easier!

Thank you !!!
Sun Oct 27, 2019 10:01 pm
Forum: Lewis Structures
Topic: Exceptions to the Octet Rule
Replies: 3
Views: 62

### Exceptions to the Octet Rule

I remember that there were certain exceptions to the Lewis structure in regards to the octet rule, however, I don't understand the logical/reason behind it. Can someone please explain?
Sun Oct 06, 2019 6:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8034
Views: 1407658

### Re: Post All Chemistry Jokes Here

Thanos got jokes!
Sun Oct 06, 2019 6:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8034
Views: 1407658

### Re: Post All Chemistry Jokes Here

Friend: No, why?
Me: Because, all the good one's Argon.
Sun Oct 06, 2019 6:36 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 57
Views: 48556

### Re: How to find my posts

Is there a way to access the lecture powerpoints because I wanted to screenshot one of the images and print it out for reference in my notes.
Sun Oct 06, 2019 6:30 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelength Plausibility
Replies: 31
Views: 1443

### Re: Wavelength Plausibility

I remember in the lecture the slides said that visible light can be seen from 700nm (Red) to 400nm (Violet) but in the picture from the slides it went up to 720 nm. So, basically my question is if visible light ranging from 700 nm to 400nm or from 720nm to 400nm.
Sun Oct 06, 2019 6:19 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 68
Views: 3876

### Re: Showing Work for Limiting Reactant Calculations on Tests[ENDORSED]

I don't want to be that person but what does dimensional analysis mean?