Search found 103 matches
- Sun Mar 14, 2021 11:55 pm
- Forum: General Rate Laws
- Topic: Intermediate
- Replies: 59
- Views: 3795
Re: Intermediate
An intermediate is a compound that is produced in one reaction and then consumed in the next step.
- Sun Mar 14, 2021 11:53 pm
- Forum: First Order Reactions
- Topic: Half Life Unit
- Replies: 38
- Views: 1567
Re: Half Life Unit
It depends on what units are being used in the question.
- Sun Mar 14, 2021 11:51 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q and K
- Replies: 16
- Views: 782
Re: Q and K
K is only at equilibrium, and Q is at any particular point of the reaction.
- Sun Mar 14, 2021 11:50 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: strong vs weak acid pH level
- Replies: 28
- Views: 913
Re: strong vs weak acid pH level
Strong acids fully dissociate which means that the concentration of H3O+ will be high. Weak acids do not fully dissociate so they have smaller concentration of H3O+. Therefore, strong acids have lower pH levels than weak acids.
- Sun Mar 14, 2021 11:46 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Sponetanity
- Replies: 33
- Views: 1442
Re: Sponetanity
A negative deltaG, Gibbs free energy, is spontaneous, so yes it can be used to determine spontaneity.
- Sun Mar 14, 2021 11:44 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: Orientation Numbers
- Replies: 3
- Views: 400
Re: Orientation Numbers
Lewis structures can be used to find the number of orientations
- Sun Mar 14, 2021 11:41 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Meaning of K
- Replies: 55
- Views: 3921
Re: Meaning of K
K will always stand as the equilibrium constant or temperature in kelvin.
- Sun Mar 14, 2021 11:40 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Effect of catalyst
- Replies: 22
- Views: 2399
Re: Effect of catalyst
catalyst only affects the pathway taken, it does not change the states of the products and reactants.
- Sun Mar 14, 2021 11:36 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: degeneracy
- Replies: 17
- Views: 654
Re: degeneracy
Degeneracy is used to help calculate the entropy of a system.
- Sun Mar 14, 2021 11:35 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: 0 Entropy
- Replies: 4
- Views: 375
Re: 0 Entropy
As temperature approaches absolute zero, entropy approaches zero.
- Sun Mar 14, 2021 11:34 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: What's the difference between State and Path functions?
- Replies: 6
- Views: 506
Re: What's the difference between State and Path functions?
State functions are independent of the paths taken , whereas path functions are dependent on the path taken.
- Sun Mar 14, 2021 11:33 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Bond Enthalpies
- Replies: 15
- Views: 829
Re: Bond Enthalpies
Bond enthalpies can never be negative because they are the energies required to break bonds.
- Sun Mar 14, 2021 11:28 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: specific vs molar heat capacity
- Replies: 16
- Views: 936
Re: specific vs molar heat capacity
Specific Heat refers to grams whereas molar heat capacity refers to moles.
- Sun Mar 14, 2021 11:27 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Closed Systems
- Replies: 3
- Views: 319
Re: Closed Systems
q=mC(delta T) for closed systems
- Sun Mar 14, 2021 11:26 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Change in entropy
- Replies: 6
- Views: 490
Re: Change in entropy
Divide deltaH by the temperature.
- Sun Mar 14, 2021 11:25 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 6
- Views: 506
Re: Bond Enthalpies
It is the energy required to break bonds which is always positive.
- Sun Mar 14, 2021 11:24 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: when to add Pt (s)
- Replies: 23
- Views: 1038
Re: when to add Pt (s)
Pt is added on the side of the cell diagram that doesn't have a conducting metal.
- Sun Mar 14, 2021 11:24 pm
- Forum: Zero Order Reactions
- Topic: Determining Order of Reactions
- Replies: 9
- Views: 613
Re: Determining Order of Reactions
Concentrations and rate changes are needed to find the order.
- Sun Mar 14, 2021 10:48 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridges
- Replies: 4
- Views: 456
Re: Salt Bridges
Salt bridges are represented by double vertical lines
- Sun Mar 14, 2021 10:46 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Which R to use
- Replies: 42
- Views: 3019
Re: Which R to use
You would use 8.314
- Sun Mar 14, 2021 10:44 pm
- Forum: Ideal Gases
- Topic: Temperature
- Replies: 99
- Views: 6367
Re: Temperature
Yes, if not given you should assume 25 degrees celsius
- Sun Mar 14, 2021 10:40 pm
- Forum: General Science Questions
- Topic: Final thoughts
- Replies: 28
- Views: 4752
Re: Final thoughts
Went in thinking I was going to hate it but in the end felt pretty confident that I did fairly well on it.
- Sun Mar 07, 2021 10:28 pm
- Forum: Van't Hoff Equation
- Topic: Celcius vs Kelvin for T1 and T2
- Replies: 84
- Views: 6912
Re: Celcius vs Kelvin for T1 and T2
Always stick to kelvin!
- Sun Mar 07, 2021 10:27 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: E° vs. E and G° vs. G
- Replies: 25
- Views: 1073
Re: E° vs. E and G° vs. G
Yes, the standard condition are the same for both of them.
- Sun Mar 07, 2021 10:25 pm
- Forum: Balancing Redox Reactions
- Topic: states of matter
- Replies: 58
- Views: 2377
Re: states of matter
Some of the question require the states of matter whereas the other don't.
- Sun Mar 07, 2021 10:24 pm
- Forum: Student Social/Study Group
- Topic: How do you deal with burnout?
- Replies: 144
- Views: 15112
Re: How do you deal with burnout?
I'll normally play some videogames or go outside for walk to deal with burnouts.
- Sun Mar 07, 2021 10:22 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Slowest step
- Replies: 38
- Views: 1627
Re: Slowest step
This is because the overall reaction cannot come to completion until the slowest step comes to completion.
- Sun Feb 28, 2021 11:48 pm
- Forum: Balancing Redox Reactions
- Topic: states of matter
- Replies: 58
- Views: 2377
Re: states of matter
Some of the questions require the states of matter.
- Sun Feb 28, 2021 11:44 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: K meaning
- Replies: 29
- Views: 2256
Re: K meaning
K is Boltzmann's constant which is approximately 1.380649×10−23 J/K
- Sun Feb 28, 2021 11:43 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: coulomb?
- Replies: 18
- Views: 1136
Re: coulomb?
Coulomb = measure of electrical charge in 6.24x10^18 electrons
- Sun Feb 28, 2021 11:41 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing Acidic Versus Basic Solutions
- Replies: 20
- Views: 913
Re: Balancing Acidic Versus Basic Solutions
Acidic uses H+ to balance, whereas basic uses OH- to balance.
- Sun Feb 28, 2021 11:40 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anodes and Cathodes
- Replies: 22
- Views: 1033
Re: Anodes and Cathodes
A cathode has a higher reduction potential.
- Sun Feb 21, 2021 8:23 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Work in a Constant Volume
- Replies: 13
- Views: 936
Re: Work in a Constant Volume
In the equation w= -PdeltaV if the volume is constant then the change in volume is zero. Therefore -P(0) = 0 showing why the work is 0 at constant volume.
- Sun Feb 21, 2021 8:20 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Stable vs Unstable Gibbs Free Energy
- Replies: 16
- Views: 2524
Re: Stable vs Unstable Gibbs Free Energy
A positive delta g denotes a thermodynamically unstable molecule whereas a negative delta g denotes a thermodynamically stable molecule.
- Sun Feb 21, 2021 8:18 pm
- Forum: Phase Changes & Related Calculations
- Topic: State Property
- Replies: 71
- Views: 3194
Re: State Property
A stae function doesn't depend on the path taken, it only depends on the initial and final values.
- Sun Feb 21, 2021 8:16 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: entropy positive value
- Replies: 30
- Views: 1963
Re: entropy positive value
He was saying that the entropy of the universe is always positive.
- Sun Feb 21, 2021 8:16 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Which R Values to use
- Replies: 22
- Views: 8541
Re: Which R Values to use
It all depends on the units given in the problem.
- Sun Feb 07, 2021 10:59 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: What is the difference between an open and closed system?
- Replies: 3
- Views: 277
Re: What is the difference between an open and closed system?
An open system is able to exchange matter and energy, but a closed system is able to exchange energy but not matter.
- Sun Feb 07, 2021 10:57 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Specific heat value
- Replies: 11
- Views: 378
Re: Specific heat value
If it occurs on both side we can just cancel them out.
- Sun Feb 07, 2021 10:55 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Extensive vs Intensive
- Replies: 10
- Views: 372
Re: Extensive vs Intensive
Extensive is dependent on the mass whereas intensive is not dependent on the mass.
- Sun Feb 07, 2021 10:54 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Negative Sign
- Replies: 16
- Views: 590
Re: Negative Sign
The negative sign goes on the side that is exothermic.
- Sun Feb 07, 2021 10:53 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed System
- Replies: 52
- Views: 2839
Re: Closed System
In a closed system energy can transfer in and out but matter cannot.
- Sun Jan 31, 2021 11:50 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Taking the Anti-Log
- Replies: 37
- Views: 2620
Re: Taking the Anti-Log
The anti-log in order to go prom pKa to Ka is 10^-pKa.
- Sun Jan 31, 2021 11:48 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Clarification on pKw
- Replies: 15
- Views: 3870
Re: Clarification on pKw
At 25 degrees Celsius pKw will always be equal to 14
- Sun Jan 31, 2021 11:47 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: perfect system
- Replies: 20
- Views: 849
Re: perfect system
The equation shows that the heat of the reaction is equal to the heat of the surroundings.
- Sun Jan 31, 2021 11:46 pm
- Forum: Ideal Gases
- Topic: Inverse Kc [ENDORSED]
- Replies: 41
- Views: 2108
Re: Inverse Kc [ENDORSED]
You would use it when you want the Kc of the reverse reaction
- Sun Jan 31, 2021 11:43 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Is partial pressure dependent on moles?
- Replies: 7
- Views: 425
Re: Is partial pressure dependent on moles?
Yes, the partial pressures are dependent on the moles
- Sun Jan 24, 2021 11:38 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: endothermic vs. exothermic
- Replies: 11
- Views: 548
Re: endothermic vs. exothermic
The exothermic reaction will release heat cause the outside to be hot, whereas the endothermic reaction will absorb heat which causes the outside to be cooler.
- Sun Jan 24, 2021 11:36 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Determining pH
- Replies: 18
- Views: 827
Re: Determining pH
The -log of [H+] gives pH and the -log of [OH-] gives the pOH
- Sun Jan 24, 2021 11:35 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Neutral, unknown, or charged?
- Replies: 6
- Views: 240
Re: Neutral, unknown, or charged?
Use pH and pKa, for an acid if pH>pKa then it is charged, if pKa>pH then it is neutral
- Sun Jan 24, 2021 11:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Periodic Tables on Midterm
- Replies: 23
- Views: 903
Re: Periodic Tables on Midterm
An equations sheet, periodic table, and calculator are allowed.
- Sun Jan 24, 2021 11:29 pm
- Forum: Phase Changes & Related Calculations
- Topic: Define Phase Change
- Replies: 78
- Views: 5298
Re: Define Phase Change
It is the change in the state of matter.
- Tue Dec 15, 2020 10:52 pm
- Forum: Student Social/Study Group
- Topic: Plans for Relaxing After Finals
- Replies: 98
- Views: 14678
Re: Plans for Relaxing After Finals
I'm definitely going to be staying up all night playing games
- Sat Dec 12, 2020 5:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Electron Geometry
- Replies: 8
- Views: 455
Re: Electron Geometry
Electron geometry is how electrons are positioned in an atom, whereas molecular geometry is how atoms are positioned within a molecule.
- Sat Dec 12, 2020 5:22 pm
- Forum: Student Social/Study Group
- Topic: Practice Problems for final
- Replies: 4
- Views: 586
Re: Practice Problems for final
I'm redoing the practice problems from my weekly discussions.
- Sat Dec 12, 2020 5:19 pm
- Forum: Bond Lengths & Energies
- Topic: Higher Melting Point
- Replies: 28
- Views: 2640
Re: Higher Melting Point
CHI3 has a higher melting point because iodine has a larger atomic radius meaning that it has more electrons.
- Sat Dec 12, 2020 5:17 pm
- Forum: Polyprotic Acids & Bases
- Topic: Polyprotic Acids
- Replies: 7
- Views: 463
Re: Polyprotic Acids
Yes, they are acids that have the ability to donate more than 1 hydrogen.
- Sat Dec 12, 2020 5:11 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbitals and Their Nodal Planes
- Replies: 7
- Views: 634
Re: Orbitals and Their Nodal Planes
s-orbitals have 0 nodal planes, p-orbitals have 1 nodal plane, d-orbitals have 2 nodal planes, and f-orbitals have 3 nodal planes.
- Sat Dec 12, 2020 4:31 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: [OH-] and pOH difference
- Replies: 9
- Views: 1908
Re: [OH-] and pOH difference
[OH-] is the concentration of OH- whereas pOH is the basicity of the solution. We use -log[OH-] to find the pOH. To find the [OH-] we use 10^-pOH.
- Sat Dec 12, 2020 4:27 pm
- Forum: Naming
- Topic: Aqua vs Hydrate
- Replies: 14
- Views: 1048
Re: Aqua vs Hydrate
Yes, you're correct, in the coordination compound H2O is aqua and when it isn't in the coordination compound it is hydrate.
- Sat Dec 12, 2020 4:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw vs. trigonal pyramidal
- Replies: 22
- Views: 2363
Re: Seesaw vs. trigonal pyramidal
Seesaw has 5 regions of electron density whereas trigonal planar has 4 regions of electron density.
- Sat Dec 12, 2020 4:22 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Why isn't HF a strong acid?
- Replies: 23
- Views: 7417
Re: Why isn't HF a strong acid?
HF is a weak acid because the bond between H and F is extremely short since F has a very small atomic radius. The shorter a bond is, the stronger the bond is. The stronger bond makes it harder for the HF bond to break when dissolved in H2O causing the acid to be weak.
- Sun Dec 06, 2020 8:23 pm
- Forum: Naming
- Topic: Order of Ligands/naming
- Replies: 28
- Views: 1212
Re: Order of Ligands/naming
You would arrange the ligands in alphabetical order.
- Sun Dec 06, 2020 8:22 pm
- Forum: Naming
- Topic: what does (en) mean?
- Replies: 23
- Views: 10423
Re: what does (en) mean?
En stands for ethylenediamine.
- Sun Dec 06, 2020 8:20 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: tetradentate
- Replies: 8
- Views: 514
Re: tetradentate
The dentate refers to binding sites of the ligand.
- Sun Dec 06, 2020 6:12 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Does pH indicate strength of an acid?
- Replies: 26
- Views: 2525
Re: Does pH indicate strength of an acid?
Yes, the lower a pH, the stronger the acid is.
- Sun Dec 06, 2020 6:10 pm
- Forum: Hybridization
- Topic: Pi Bonds Cannot Rotate
- Replies: 29
- Views: 4134
Re: Pi Bonds Cannot Rotate
Pi-bonds overlap in a parallel, making it unable to rotate.
- Sun Dec 06, 2020 6:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: CCLE fixed?
- Replies: 19
- Views: 910
Re: CCLE fixed?
I've tried the UCLA VPN and logging in and out but its still giving me the error code when I try to watch lectures for this class. For some reason I can still access the lectures for my other classes.
- Sun Nov 29, 2020 8:27 pm
- Forum: Resonance Structures
- Topic: Same formal charges, which resonance structure?
- Replies: 4
- Views: 340
Re: Same formal charges, which resonance structure?
You would want the negative formal charge to be on the more electronegative element
- Sun Nov 29, 2020 8:24 pm
- Forum: Hybridization
- Topic: Hybridization of Carbon
- Replies: 10
- Views: 364
Re: Hybridization of Carbon
It has 4 potential bonds, therefore, 1 s orbital and 3 p orbital.
- Sun Nov 29, 2020 8:20 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 17
- Views: 714
Re: Polarity
If a structure is symmetrical it will be nonpolar. If a structure is not symmetrical and has different atoms on each side it is polar.
- Sun Nov 29, 2020 8:15 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: H20 Shape
- Replies: 17
- Views: 1056
Re: H20 Shape
H20 has 4 electron groups and 2 lone pairs, causing it to be bent.
- Sun Nov 29, 2020 8:12 pm
- Forum: *Indicators
- Topic: Indicators
- Replies: 6
- Views: 2204
Re: Indicators
Anything that isn't covered in class isn't on the final.
- Sun Nov 22, 2020 10:20 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: memorizing VSEPR models
- Replies: 13
- Views: 758
Re: memorizing VSEPR models
I've been using quizlet to test myself on the models and its been extremely helpful.
- Sun Nov 22, 2020 10:18 pm
- Forum: Student Social/Study Group
- Topic: Study Tips for Final Exam
- Replies: 57
- Views: 2758
Re: Study Tips for Final Exam
I think that reviewing textbook problems, sapling question, lecture notes, and visiting workshop hours would be extremely helpful in terms of preparing for the final exam.
- Sun Nov 22, 2020 10:16 pm
- Forum: Ionic & Covalent Bonds
- Topic: variable valence
- Replies: 5
- Views: 283
Re: variable valence
I don't believe so since it wasn't listed in the syllabus.
- Sun Nov 22, 2020 10:14 pm
- Forum: Bond Lengths & Energies
- Topic: Boiling/Melting Point
- Replies: 29
- Views: 1289
Re: Boiling/Melting Point
When determining the boiling point and melting points we look at the intermolecular forces.
- Sun Nov 22, 2020 10:13 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: London Dispersion
- Replies: 33
- Views: 1876
Re: London Dispersion
London Dispersion Forces are always present.
- Sun Nov 15, 2020 11:22 pm
- Forum: Dipole Moments
- Topic: London Dispersion forces
- Replies: 14
- Views: 580
Re: London Dispersion forces
Yes, all molecules do have London dispersion forces.
- Sun Nov 15, 2020 11:17 pm
- Forum: Lewis Structures
- Topic: Length of bonds
- Replies: 6
- Views: 378
Re: Length of bonds
I don't think that is always the difference in length, it might just be a coincidence.
- Sun Nov 15, 2020 11:12 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic radius
- Replies: 18
- Views: 894
Re: Ionic radius
The more negative an Ion becomes, the larger its radius becomes, whereas the more positive an ion becomes, the smaller its radius becomes.
- Sun Nov 15, 2020 11:10 pm
- Forum: Electronegativity
- Topic: determining electronegativity
- Replies: 40
- Views: 5833
Re: determining electronegativity
We're focusing more on the trend. Electronegativity increases as you move up and to the right on the periodic table.
- Sun Nov 15, 2020 11:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 2
- Replies: 23
- Views: 895
Re: Midterm 2
The time we have will be the same, but since these questions should be less time consuming than the ones on Midterm 1, it should work out fine.
- Sun Nov 08, 2020 11:09 pm
- Forum: Bond Lengths & Energies
- Topic: Bond Length
- Replies: 22
- Views: 1280
Re: Bond Length
Bond lengths are experimentally determined.
- Sun Nov 08, 2020 11:07 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electronegativity
- Replies: 16
- Views: 1059
Re: Electronegativity
Fluorine is the most electronegative because it only requires one more electron to reach stability.
- Sun Nov 08, 2020 11:04 pm
- Forum: Lewis Acids & Bases
- Topic: Acid vs. Base
- Replies: 8
- Views: 453
Re: Acid vs. Base
We should learn more about this in upcoming lectures.
- Sun Nov 08, 2020 11:02 pm
- Forum: Ionic & Covalent Bonds
- Topic: Atomic Radius
- Replies: 38
- Views: 3148
Re: Atomic Radius
As you move across the period, the atomic number increases, thus more protons are present. This increases attraction causing the atomic radius to decrease.
- Sun Nov 08, 2020 11:00 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: S and P electrons
- Replies: 14
- Views: 1546
Re: S and P electrons
P electrons are farther from the nucleus, which causes them to have higher energy.
- Sun Nov 01, 2020 6:42 pm
- Forum: Trends in The Periodic Table
- Topic: ionic radius
- Replies: 14
- Views: 480
Re: ionic radius
Anions have the largest ionic radius since they have more electrons then the original atom, while cations have the smallest ionic radius since they have less electrons than the original atom.
- Sun Nov 01, 2020 6:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm grades
- Replies: 19
- Views: 870
Re: Midterm grades
I'm assuming some time in between the end of week 5 and middle of week 6.
- Sun Nov 01, 2020 6:38 pm
- Forum: Octet Exceptions
- Topic: Other Exceptions
- Replies: 4
- Views: 243
Re: Other Exceptions
Yeah, they are both exceptions to the octet rule.
- Sun Nov 01, 2020 6:33 pm
- Forum: Properties of Light
- Topic: How to remember what v is in equations
- Replies: 46
- Views: 7375
Re: How to remember what v is in equations
The italicized v is for frequency, whereas the normal v is for velocity.
- Sun Nov 01, 2020 6:32 pm
- Forum: Properties of Light
- Topic: Is c always the speed of light?
- Replies: 92
- Views: 5519
Re: Is c always the speed of light?
Yes, c will always be the speed of light.
- Sun Oct 25, 2020 9:11 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: for test 1
- Replies: 14
- Views: 927
Re: for test 1
I don't think we need to know the definition word for word, but rather we should understand the concepts and how to apply them.
- Sun Oct 25, 2020 9:09 pm
- Forum: Photoelectric Effect
- Topic: Calculations
- Replies: 18
- Views: 684
Re: Calculations
You should round the final answer. When you round throughout the calculations, your final answer will likely be off by a tiny bit.
- Sun Oct 25, 2020 9:06 pm
- Forum: General Science Questions
- Topic: When to use sig figs
- Replies: 19
- Views: 805
Re: When to use sig figs
I normally apply sig figs at the end when I get my final answer.
- Sun Oct 25, 2020 9:02 pm
- Forum: Student Social/Study Group
- Topic: Midterm Prep
- Replies: 10
- Views: 470
Re: Midterm Prep
I believe that doing the practice problems should be extremely helpful for the midterm.
- Sun Oct 25, 2020 9:00 pm
- Forum: DeBroglie Equation
- Topic: Derivation of Equations on Midterm?
- Replies: 17
- Views: 587
Re: Derivation of Equations on Midterm?
I do not believe so since the midterm will be in a multiple choice format.
- Sun Oct 11, 2020 3:18 pm
- Forum: Significant Figures
- Topic: Sapling Question 2
- Replies: 14
- Views: 436
Re: Sapling Question 2
It must be positive because using a negative power will cause your result to be .02917 whereas the correct number is 291.7.
- Sun Oct 11, 2020 3:13 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Solution Volume
- Replies: 2
- Views: 484
Re: Solution Volume
You should start out the problem by finding the Molarity of the solution by using the given 2.111g of the solid and 250 ml of water. Find the molar mass of the sodium carbonate. Then divide the 2.111g of the solid by its molar mass in order to calculate for the moles of the solid. By doing this you ...