Search found 75 matches

by Karan Thaker 2L
Sat Mar 16, 2019 10:07 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Platinum
Replies: 5
Views: 60

Re: Platinum

Can add Pt (s), or C (graphite)... Can also use Hg (l) if your ions / solids involve mercury.
by Karan Thaker 2L
Sat Mar 16, 2019 10:06 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: cell potential
Replies: 3
Views: 112

Re: cell potential

To do E cath - E anode = E cell, always keep the reaction in reduction form... if you reverse anything, you have to add.
by Karan Thaker 2L
Wed Mar 13, 2019 9:41 pm
Forum: *Enzyme Kinetics
Topic: Catalysts
Replies: 11
Views: 463

Re: Catalysts

Important to note catalysts lower Ea, through altering and lowering the transition state of the reactants. They can affect orientation to idealize reactants' position for a reaction, or also weaken bonds of reactants to make them easier to break.
by Karan Thaker 2L
Wed Mar 13, 2019 9:35 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Temperature
Replies: 2
Views: 122

Re: Temperatutre

I always convert to Kelvin to be safe... There are many instances, such as when you calculate for entropy when you divide two temperatures, and using Celcius here will mess up your ratio and give you an incorrect answer. You also know what to use based on the units and what you need to cancel out......
by Karan Thaker 2L
Wed Mar 13, 2019 9:32 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Isothermal
Replies: 5
Views: 73

Re: Isothermal

I believe it is just a law. there can be no change in U if temperature does not change.
by Karan Thaker 2L
Wed Mar 13, 2019 9:30 pm
Forum: First Order Reactions
Topic: Time Conversions
Replies: 6
Views: 172

Re: Time Conversions

Use the appropritate time conversions: 1 hr is 60 mins, 60 secs in 1 min, 24 hr in day, etc.Set up diagonal conversions to cancel units out and end in whatever time unit you need.
by Karan Thaker 2L
Wed Mar 13, 2019 9:23 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Elementary Step
Replies: 1
Views: 29

Re: Elementary Step

Elementary steps are any steps that transition from products to reactants, and don't require additional steps to transfer the reactants to products...
by Karan Thaker 2L
Tue Mar 05, 2019 8:45 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Delta n
Replies: 7
Views: 221

Re: Delta n

Yes, in many cases it's aqueous substances as well.
by Karan Thaker 2L
Tue Mar 05, 2019 8:40 pm
Forum: Zero Order Reactions
Topic: Initial reactions rates
Replies: 3
Views: 69

Re: Initial reactions rates

Also, I thought of it as being an initial rate, which means products may be negliglble or very low, and allow us to focus our calculations on reacatants only.
by Karan Thaker 2L
Tue Mar 05, 2019 8:37 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Activation Energy
Replies: 2
Views: 52

Re: Activation Energy

That's exactly how I think of it as well. Simply examine the equation and see what would happen. With the Arrhenius equation, it can be a little confusing to predict it right off the bat so plug in numbers to see what happens as well.
by Karan Thaker 2L
Tue Mar 05, 2019 8:35 pm
Forum: Balancing Redox Reactions
Topic: k from lnK
Replies: 5
Views: 101

Re: k from lnK

think about it as bases. When we cancel a log, we do it by taking the base of "log" which is 10, and raising it to the power of the value. Here, it is the same principle, except the base is now "e' instead of 10.
by Karan Thaker 2L
Sat Mar 02, 2019 7:40 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Spontaneous reactions
Replies: 7
Views: 779

Re: Spontaneous reactions

Not always, you could have a negative entropy. This would give you negative - positive, and if the entropy is large enough it could become larger than the negative value and make delta G positive. Always refer back to the equation G = H - TS
by Karan Thaker 2L
Sat Mar 02, 2019 7:39 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: w vs wmax
Replies: 5
Views: 94

Re: w vs wmax

It's the maximum nonexpansion work a system can do at reverseible conditions.
by Karan Thaker 2L
Sat Mar 02, 2019 7:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Topics
Replies: 6
Views: 92

Re: Final Topics

Only necessary things I'd keep in mind from the previous quarter is drawing lewis structures and basics like limiting reacatant etc.
by Karan Thaker 2L
Thu Feb 21, 2019 11:38 am
Forum: Balancing Redox Reactions
Topic: k from lnK
Replies: 5
Views: 101

Re: k from lnK

You know how you have a -log(H+) to find pH, then to find H+ you raise 10 to the value of the pH? It's the similar thing... ln is just a log that has base e, so you take e and raise it to that power.
by Karan Thaker 2L
Thu Feb 21, 2019 11:33 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode v. Cathode
Replies: 9
Views: 136

Re: Anode v. Cathode

The way I think of it, is that the anode repels the negatively charged electrons since it is negatively charged (loss of electrons). The cathode attracts and receives the electrons (gain of electrons).
by Karan Thaker 2L
Mon Feb 18, 2019 4:47 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Polyprotic Acids
Replies: 5
Views: 95

Re: Polyprotic Acids

I write it out as Ka1, Ka2, Ka3... so on and so forth. Use the respective conjugate bases and acid each time you do the step.
by Karan Thaker 2L
Mon Feb 18, 2019 4:45 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Pressure Change
Replies: 4
Views: 69

Re: Pressure Change

Exactly! Boyle's law shows that they are inversely related. V2/V1 is the same "ratio" as P1/P2.
by Karan Thaker 2L
Mon Feb 18, 2019 4:44 pm
Forum: Calculating Work of Expansion
Topic: Units for R
Replies: 10
Views: 215

Re: Units for R

You have to approach it depending on what you want to cancel out within the context of the problem. Choose the R value with units that will cancel out whatever form of units you have already been given.
by Karan Thaker 2L
Mon Feb 18, 2019 4:42 pm
Forum: General Science Questions
Topic: Delta G equaling w
Replies: 2
Views: 151

Re: Delta G equaling w

I think theoretically we learn that it equals, but realistically, the maximum work that can be done may not equal delta G since it could be in the form of non usable work.
by Karan Thaker 2L
Mon Feb 18, 2019 4:40 pm
Forum: General Science Questions
Topic: Conservation of Energy Question
Replies: 1
Views: 110

Re: Conservation of Energy Question

The spring would release as the rubber band melts away I believe and the spring would release all its potential energy there. Not sure tho.
by Karan Thaker 2L
Mon Feb 18, 2019 4:38 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G vs. Delta G (degree sign)
Replies: 4
Views: 102

Re: Delta G vs. Delta G (degree sign)

Remember that standard conditions are 1 atm and 298 K, meaning it's constant.
by Karan Thaker 2L
Thu Feb 07, 2019 12:56 pm
Forum: Calculating Work of Expansion
Topic: Ideal gas expansion
Replies: 4
Views: 72

Re: Ideal gas expansion

I think you're right... the work energy is thought of a value, rather than being gained or loss in this context.
by Karan Thaker 2L
Thu Feb 07, 2019 12:54 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: constant volume
Replies: 3
Views: 54

Re: constant volume

Think of the graph we examined in lecture... Lack of volume change would contribute to no area under the curve, making the word done equal to zero.
by Karan Thaker 2L
Thu Feb 07, 2019 12:48 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: delta u
Replies: 2
Views: 50

Re: delta u

I agree... There are other factors that affect delta U which can alter it such as q and w even if temperature is constant.
by Karan Thaker 2L
Sat Feb 02, 2019 7:49 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: isolated system
Replies: 5
Views: 85

Re: isolated system

Maybe we would only make current calculations on the system's state, but as far as dynamics go, there are none so ya we couldn't really do much.
by Karan Thaker 2L
Sat Feb 02, 2019 7:47 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: calorimeters
Replies: 7
Views: 105

Re: calorimeters

I agree... specifics that he wants us to take into further consideration would be included on a test... I would just remember that it's isolated if bomb calorimeter is used.
by Karan Thaker 2L
Sat Feb 02, 2019 7:45 pm
Forum: Phase Changes & Related Calculations
Topic: Drawing a heating curve
Replies: 6
Views: 83

Re: Drawing a heating curve

I'm not sure if it matters as long as you show the progression of the reaction correct?
by Karan Thaker 2L
Thu Jan 24, 2019 1:36 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: pKa vs. pH
Replies: 15
Views: 301

Re: pKa vs. pH

They're both logarithmic expression of completely different things. pKa is a logarithmic expression of Ka values while pH is a logarithmic expression of hydrogen ion concentration.
by Karan Thaker 2L
Thu Jan 24, 2019 1:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: pH vs pKa
Replies: 3
Views: 62

Re: pH vs pKa

If given pH, just take the inverse log of the pH and this will give you H30+ concentration. Follow steps on ice tables and determine other concentartions and you have your Ka value. The main difference is that pKa is a logartithmic expression of Ka values and pH is a logarithmic expression of hydrog...
by Karan Thaker 2L
Thu Jan 24, 2019 1:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Assuming K
Replies: 2
Views: 46

Re: Assuming K

Doesn't K value (by itself) normally imply that you should concentrations thought?
by Karan Thaker 2L
Thu Jan 24, 2019 1:28 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: endothermic vs exothermic
Replies: 6
Views: 111

Re: endothermic vs exothermic

You need to know this for the test too. Adding heat changes the Q value for a reaction. If a reaction is endothermic that means heat is on the left side (reactants side) of the equation, while exothermic reactions have heat being released on the products side. You treat heat as a reactant or product...
by Karan Thaker 2L
Thu Jan 17, 2019 7:51 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Basic vs. Alkaline
Replies: 2
Views: 204

Re: Basic vs. Alkaline

Alkaline I think has to do with elements from the second row (since they are called alkaline earth metals). They are basic, but not all bases have these alkaline earth metals.
by Karan Thaker 2L
Thu Jan 17, 2019 7:48 pm
Forum: Ideal Gases
Topic: Partial Pressure for Gases [ENDORSED]
Replies: 2
Views: 79

Re: Partial Pressure for Gases [ENDORSED]

You could also increase the partial pressure of that gas by decreasing the moles of gas of the other gasses right?
by Karan Thaker 2L
Thu Jan 17, 2019 7:46 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Strong acids and bases
Replies: 2
Views: 121

Re: Strong acids and bases

For strong acids I just memorize the list. For strong bases a good guideline is that first and second row elements elements (metals) hydroxides make strong bases. There are exceptions though so I would memorize most of the list above.
by Karan Thaker 2L
Thu Jan 17, 2019 7:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Conjugate base
Replies: 7
Views: 98

Re: Conjugate base

Also usually carry a negative charge because they were just deprotonated.
by Karan Thaker 2L
Fri Jan 11, 2019 9:36 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium Constant Values
Replies: 3
Views: 77

Re: Equilibrium Constant Values

Ya they're always given (as of now)!
by Karan Thaker 2L
Fri Jan 11, 2019 9:35 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Effect of Pressure
Replies: 3
Views: 57

Re: Effect of Pressure

I would probably just follow the way Dr. Lavelle taught us in lecture.
by Karan Thaker 2L
Fri Jan 11, 2019 9:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc and Kp
Replies: 12
Views: 150

Re: Kc and Kp

Gases as well as aqueous substances!
by Karan Thaker 2L
Thu Dec 06, 2018 11:57 pm
Forum: Lewis Structures
Topic: Lewis Structure of CO
Replies: 3
Views: 91

Re: Lewis Structure of CO

Ya you can't have the greater formal charge distributed along the less electronegative atom.
by Karan Thaker 2L
Thu Dec 06, 2018 11:47 pm
Forum: Trends in The Periodic Table
Topic: Expanded Valence Shells
Replies: 3
Views: 148

Re: Expanded Valence Shells

That's the same methodology I use when I get confused ^ ... I often forget which atoms are capable of forming more than an octet and can have expanded shells and simply think of the possible values based on quantum number. It always ends up making sense and working out.
by Karan Thaker 2L
Thu Dec 06, 2018 11:45 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing power
Replies: 1
Views: 136

Re: Polarizing power

small positively charged ions with high charge have the greatest polarizing power. No, ions increase in polarizing power as they get smaller, since the positively charged nucleus can interact with outer electrons of an anion more closely.
by Karan Thaker 2L
Thu Dec 06, 2018 11:43 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: strong vs weak acids
Replies: 2
Views: 53

Re: strong vs weak acids

By neutralization, assume that the strong acid / base cancel each other out. While this may not happen in reality, we assume this for this course to simplify our calculations process.
by Karan Thaker 2L
Fri Nov 30, 2018 1:43 am
Forum: Lewis Structures
Topic: Octet Rule
Replies: 5
Views: 115

Re: Octet Rule

The first four elements can form less than an octet because some of them don't even have p orbitals to fill 8 electrons with such as hydrogen. They also don't form octets because they have lower formal charges with less than an octet (more stable) or simply don't have enough electrons to form an oct...
by Karan Thaker 2L
Fri Nov 30, 2018 1:39 am
Forum: Determining Molecular Shape (VSEPR)
Topic: One lone electron
Replies: 3
Views: 81

Re: One lone electron

I think for the purposes of this class, we were told to just treat radicals as having the same effect as lone pairs (which they do), just keeping in mind that they have the effect at a lower magnitude than a lone pair.
by Karan Thaker 2L
Fri Nov 30, 2018 1:36 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Size Vs. Charge of Cations
Replies: 2
Views: 65

Re: Size Vs. Charge of Cations

I don't think that was discussed in lectures OR the book. I doubt they would test us on something that detailed that we don't know. I'd just know the trend that you already listed because they'll probably only test us on different cations having EITHER varying size or charge.
by Karan Thaker 2L
Fri Nov 30, 2018 1:34 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 3
Views: 76

Re: Polydentate

It's just a ligand that has multiple electron binding sites... I feel like Dr. Lavelle only uses it for ligands that have a lot of binding sites (over two or three).
by Karan Thaker 2L
Fri Nov 30, 2018 1:30 am
Forum: Hybridization
Topic: Lone Pairs in hybridization
Replies: 3
Views: 85

Re: Lone Pairs in hybridization

Because the electrons in lone pairs themselves come from orbitals too, you need to account for them while you generate your hybrid orbitals.
by Karan Thaker 2L
Sat Nov 24, 2018 7:48 pm
Forum: Octet Exceptions
Topic: Incomplete Octet
Replies: 2
Views: 185

Re: Incomplete Octet

Also must keep in mind that even though it has an incomplete octet, it is still stable though. We can examine the stability of a compound by calculating formal charges. In BF3, the formal charge on each atom is zero, indicating that the Boron is stabler in that state than if it were to form addition...
by Karan Thaker 2L
Sat Nov 24, 2018 7:46 pm
Forum: Hybridization
Topic: Hybrid Orbitals and Sigma/Pi Bonds
Replies: 1
Views: 55

Re: Hybrid Orbitals and Sigma/Pi Bonds

No. Hybrid orbitals also still form sigma and pi bonds. Same rules apply: first bond is a sigma bond, additional bonds are pi.
by Karan Thaker 2L
Sat Nov 24, 2018 7:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Single vs Double bond electron diffusity
Replies: 2
Views: 68

Re: Single vs Double bond electron diffusity

In fact, VSEPR says that bonds of different orders don't get the classification as having greater electron repulsion, so thinking of it as making the molecule take up additional space as the order of the bond increases may not be correct.
by Karan Thaker 2L
Tue Nov 20, 2018 1:24 pm
Forum: Lewis Structures
Topic: Electronegativity
Replies: 4
Views: 117

Re: Electronegativity

Also, you want to place more EN atoms around the less EN central atom, so that the more EN atoms pull the electrons towards them and sort of "even out" the dipole moments. This just makes the compound/molecule more stable.
by Karan Thaker 2L
Tue Nov 20, 2018 1:23 pm
Forum: Sigma & Pi Bonds
Topic: sigma and pi bonds
Replies: 5
Views: 115

Re: sigma and pi bonds

Sigma bonds also always form first; formation of a pi bond always comes after a sigma bond exists.
by Karan Thaker 2L
Tue Nov 20, 2018 1:22 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond angles
Replies: 4
Views: 61

Re: Bond angles

It also allows you to differentiate between electron-bond interactions and bond-bond interactions. Variances in bond angle allow us to further conclude whether there are just bonds that exist, or whether there are electron lone pairs.
by Karan Thaker 2L
Fri Nov 16, 2018 8:14 pm
Forum: Hybridization
Topic: Sigma and Pi
Replies: 5
Views: 95

Re: Sigma and Pi

Pi bonds always form after the formation of a sigma bond, so that is why we always say sigma bonds form first.
by Karan Thaker 2L
Fri Nov 16, 2018 8:11 pm
Forum: Resonance Structures
Topic: Bond Lengths
Replies: 2
Views: 83

Re: Bond Lengths

You always take the average and add it to the bond lengths, because double or single bonds in resonance structures are equally shared among the compound. So for a molecule with a triple bond and two single bonds, the average bond length would be 1 and 1/3.
by Karan Thaker 2L
Fri Nov 16, 2018 8:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: analysis of non-polar molecules without vectors
Replies: 2
Views: 39

Re: analysis of non-polar molecules without vectors

All I remember him saying in today's lecture was that non polar means that the electrons are bonded and set up in a way that cancels out all dipole moments.
by Karan Thaker 2L
Sat Nov 10, 2018 4:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR?
Replies: 9
Views: 175

Re: VSEPR?

Also, an important distinction to make is that lewis structures can determine shape but within the context of a 2-D model. VSEPR effectively works for 3-D context, which is the correct model.
by Karan Thaker 2L
Sat Nov 10, 2018 4:20 pm
Forum: Dipole Moments
Topic: Dipole Moments
Replies: 4
Views: 62

Re: Dipole Moments

Dipole moments develop due to variances in electronegativity. The atom that is more electornegative has a negative value, and less electronegative is positive value. The direction can be shown by drawing an arrow from positive to negative atom, since the negative atom pulls electrons towards itself ...
by Karan Thaker 2L
Sat Nov 10, 2018 4:15 pm
Forum: Ionic & Covalent Bonds
Topic: Iconic v Covalent Strength
Replies: 4
Views: 75

Re: Iconic v Covalent Strength

It's because electric attraction is stronger between oppositely charged ions, compared to the bond formed by just sharing electrons in covalent interactions.
by Karan Thaker 2L
Sat Nov 03, 2018 11:37 pm
Forum: Photoelectric Effect
Topic: Kinetic energy
Replies: 11
Views: 2180

Re: Kinetic energy

I agree. In our context it is frequently used in electron kinetic energy calculations and for relating debroglie principles to the photo electric effect.
by Karan Thaker 2L
Sat Nov 03, 2018 11:35 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Valence Electrons
Replies: 2
Views: 50

Re: Valence Electrons

I thought they have the same number of valence electrons as the group number they fall in?
by Karan Thaker 2L
Sat Nov 03, 2018 11:34 pm
Forum: Octet Exceptions
Topic: Radicals
Replies: 3
Views: 51

Re: Radicals

Usually due to ions being created or charged molecular compounds that results in an oftentimes odd number of electrons can do that.
by Karan Thaker 2L
Sat Oct 27, 2018 3:50 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Units
Replies: 8
Views: 188

Re: Units

also important to note that the Plancks constant and momentum units are a bit odd, but they always work themselves out by cancelling, especially when we solve for indeterminacy in position. may be worth practicing working through the units and looking at how they cancel out, because this becomes rea...
by Karan Thaker 2L
Sat Oct 27, 2018 3:47 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Indeterminacy Question
Replies: 3
Views: 163

Re: Indeterminacy Question

exactly, it's in the format of minimum, or greater
by Karan Thaker 2L
Sat Oct 27, 2018 3:46 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg- In relation to wavelength
Replies: 7
Views: 145

Re: Heisenberg- In relation to wavelength

I thought it would be the opposite? Because dividing planks constant by a larger number would lead to a smaller wavelength value? Because don't they have an indirect relationship?
by Karan Thaker 2L
Mon Oct 15, 2018 9:05 pm
Forum: Properties of Light
Topic: Mass of Light
Replies: 5
Views: 84

Re: Mass of Light

I thought it only has energy and momentum, and negligible mass? Can someone clarify?
by Karan Thaker 2L
Mon Oct 15, 2018 5:24 pm
Forum: Properties of Electrons
Topic: Free vs. Bound Electrons
Replies: 6
Views: 127

Re: Free vs. Bound Electrons

So are valence electrons and non valence electrons that are still bound to the nucleus both considered bound electrons?
by Karan Thaker 2L
Mon Oct 15, 2018 5:21 pm
Forum: Properties of Electrons
Topic: Electrons in a stable state?
Replies: 6
Views: 139

Re: Electrons in a stable state?

that's a confusing way to look at it Anna. I'm not sure on the specifics of how electrons exactly "hold" their energy, but I'd just think of the electron itself containing the high state of energy as it buzzes around, and I think for our purposes at this level that should be sufficient. As...
by Karan Thaker 2L
Mon Oct 15, 2018 5:13 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Energy of bound and free electrons
Replies: 3
Views: 88

Re: Energy of bound and free electrons

this is understandable as a detached electron was likely excited and is also free to interact with other atoms (thus giving it high PE). A bound electron also has high PE, but is still bound to the atom and is being held there by stable bonds (so less energy).
by Karan Thaker 2L
Mon Oct 15, 2018 5:10 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Planck's constant
Replies: 7
Views: 103

Re: Planck's constant

the meaning and significance of it, is that it relates wave frequency and levels of energy. (J/S)
by Karan Thaker 2L
Mon Oct 15, 2018 5:06 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Absorption/Emission
Replies: 4
Views: 69

Re: Absorption/Emission

Agreed. the line that shows up is spectrum emission I think, because you can't translate absorption into a visible graph but can do this with emission. Absorption is related to what wavelengths are being taken in by a given atom. For colors and energy give off think emission.
by Karan Thaker 2L
Fri Oct 05, 2018 3:00 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass units
Replies: 2
Views: 56

Re: Molar Mass units

The -1 after the mol just means the mol goes in the denominator, but has been brought up and assigned a negative exponent.
by Karan Thaker 2L
Fri Oct 05, 2018 2:57 am
Forum: Significant Figures
Topic: Sig Figs
Replies: 3
Views: 96

Re: Sig Figs

Ya he said he'd give us partial credit, and my TA said she would take some points off for errors in significant figures. My TA seemed somewhat lenient about it but still follow it correctly if you don't want to lose any points.
by Karan Thaker 2L
Fri Oct 05, 2018 2:49 am
Forum: SI Units, Unit Conversions
Topic: SI Units
Replies: 7
Views: 142

Re: SI Units

I feel like for what we've done so far just always go with grams unless the question asks for kilograms. Chemistry involves measuring and calculating things in such small scale that using kilograms instead of grams seems unlikely. Of course, if the question specifies than go for kilogram but I think...

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