## Search found 81 matches

Mon Feb 10, 2020 5:14 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy change with surroundings
Replies: 1
Views: 21

### Entropy change with surroundings

I'm having a hard time understanding why the entropy of the surroundings increases more if temperature is lower than if it is higher? Is it because a lower temperature means its more endothermic or is there another reason?
Sun Feb 09, 2020 8:42 pm
Forum: Calculating Work of Expansion
Topic: Isobaric and Isochoric
Replies: 5
Views: 86

### Re: Isobaric and Isochoric

I think that it would be best to know them in case they come up on the exam. Isobaric is pressure, isothermal is where temperature is held constant, and isochoric is where volume is held constant.
Sun Feb 09, 2020 8:40 pm
Forum: Calculating Work of Expansion
Topic: Irreversible Expansion Explained
Replies: 7
Views: 95

### Re: Irreversible Expansion Explained

Irreversible would be pumping air into a balloon or gas bump and it happens suddenly while reversible would be slowly adding air into it gradually.
Sun Feb 09, 2020 8:37 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: difference between molar entropies?
Replies: 6
Views: 44

### Re: difference between molar entropies?

Lead has more molecules and since it is a larger number, it has more electrons, protons, and neutrons leading it to a larger mass as well
Sun Feb 09, 2020 8:36 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: 4G.1
Replies: 3
Views: 37

### 4G.1

For 4G.1 a) how can we tell how many microstates there are if they are aligned in the same way? Do we look at the orientation or number of molecules?
Thu Feb 06, 2020 11:43 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Isothermal Process Slow Expansion
Replies: 2
Views: 34

### Isothermal Process Slow Expansion

Why is the internal energy equal to 0 in an isothermal process (Q=W)?
Thu Feb 06, 2020 11:43 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Isothermal Process Slow Expansion
Replies: 2
Views: 53

### Isothermal Process Slow Expansion

Why is the internal energy equal to 0 in an isothermal process (Q=W)?
Sun Feb 02, 2020 10:49 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy
Replies: 7
Views: 63

### Re: Enthalpy

When q equals delta H that means that pressure is constant in the system. There is also no other work being done on the system.
Sun Feb 02, 2020 10:48 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: thermochemistry equations
Replies: 5
Views: 44

### Re: thermochemistry equations

I think looking at the constant equations sheet and knowing how to manipulate the formulas based on what we're given should be able to be enough. You can also write them out on your own on a separate piece of paper.
Sun Feb 02, 2020 10:46 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond enthalpy calculations
Replies: 4
Views: 36

### Re: Bond enthalpy calculations

I think drawing out the lewis structures is the best way to practice bond enthalpies because you can have it drawn out based on the structure with the lowest formal charge, which will help you know where the bonds break
Sun Feb 02, 2020 10:39 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calorimeter
Replies: 5
Views: 54

### Re: Calorimeter

From lecture, we talked about a bomb calorimeter which is an isolated system and insulation, and also an open calorimeter, and adiabatic calorimeters as well.
Sun Feb 02, 2020 10:24 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: using mass in calorimeter
Replies: 3
Views: 37

### Re: using mass in calorimeter

I think mass is used for specific heat capacities and molar capacities. I'm not too sure when we don't use it.
Sun Jan 26, 2020 6:08 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: bond v. standard
Replies: 5
Views: 42

### Re: bond v. standard

Bond enthalpies are the amount of energy required to break bonds while standard enthalpies are the change sof enthalpy during the formation of 1 mole of the substance from its elements
Sun Jan 26, 2020 6:04 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Lewis Structures
Replies: 4
Views: 52

### Re: Lewis Structures

You would start by putting the one with the lowest ionization energy in the middle, count the number of valence electrons and then place them, and then move the around until you get the structure with the lowest formal charge (count electrons and lines and subtract)
Sun Jan 26, 2020 5:53 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Best method for reaction enthalpies
Replies: 2
Views: 15

### Best method for reaction enthalpies

What is the best method to use considering we try to not use bond enthalpies since they aren't very accurate?
Sun Jan 26, 2020 5:46 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 1
Views: 17

### Bond Enthalpies

Are bond enthalpies not an accurate method because the bond enthalpy for each atom is considered an average or is there another reason?
Sun Jan 26, 2020 5:45 pm
Forum: Phase Changes & Related Calculations
Topic: work and heat
Replies: 3
Views: 37

### work and heat

What's the reasoning behind why work and heat are not state functions?
Sun Jan 19, 2020 7:07 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1 Acids and Bases Topic
Replies: 9
Views: 91

### Re: Test 1 Acids and Bases Topic

I feel its good to know the strong ones just in case. Know how to calcuate the ph, poh, find the molar concentrations, be able to use kw to find the ka or b, and be able to do the ice tables.
Sun Jan 19, 2020 7:04 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Buffer
Replies: 6
Views: 44

### Re: Buffer

A buffer is used to maintain the ph of a solution and keep it relatively constant. Weak acids and their conjugates are used for buffers
Sun Jan 19, 2020 7:03 pm
Forum: Ideal Gases
Topic: inert gas
Replies: 5
Views: 34

### Re: inert gas

Inert gases are all of the noble gases in the last column of the periodic table. They are not reactive so they don't react during chemical equations so for la chateliers principle, inert gases don't have any effect on the reaction
Sun Jan 19, 2020 7:01 pm
Forum: Ideal Gases
Topic: ph
Replies: 10
Views: 160

### Re: ph

I believe the ph can be above or below 14 but generally, the range it falls under is 0-14
Sun Jan 19, 2020 2:08 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q < K
Replies: 16
Views: 130

### Re: Q < K

If K is greater than Q that means that at point during the reaction, there are more reactants that are forming and to reach equilibrium the reaction proceeds to the right which is saying that more products are formed.
Sun Jan 12, 2020 4:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: x is small approximation
Replies: 6
Views: 72

### Re: x is small approximation

When K is really small we can say that the difference would be negligible or very small so we can use that to exclude X.
Sun Jan 12, 2020 4:38 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 5
Views: 72

### Kc vs Kp

Is Kc only for aqueous solutions while Kp is for gases because there was a question in the lecture where it had gases but was still using Kc?
Sun Jan 12, 2020 4:35 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Reaction shifts right or left?
Replies: 14
Views: 213

### Reaction shifts right or left?

Does this mean that if you have left-shift you produce more reactant and right-shift means you produce more product?
Sun Jan 12, 2020 4:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to Use Ice Tables?
Replies: 3
Views: 47

### When to Use Ice Tables?

I'm just a little confused on when we know when to use ICE Tables or not when calculating partial pressure? Are there certain circumstances when we use it?
Sun Jan 12, 2020 4:23 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Inert Gases and Equilibrium Constant
Replies: 4
Views: 59

### Inert Gases and Equilibrium Constant

Why does removing or adding an inert gas in a chemical equation not change the equilibrium constant? Adding or removing an inert gas affects the pressure and physical parameters based on La Chatalier's Principle since physical parameters cause a shift in the reaction, so why do we say that inert gas...
Sat Dec 07, 2019 5:58 pm
Forum: Conjugate Acids & Bases
Topic: metal hydroxide reaction in water?
Replies: 1
Views: 101

### metal hydroxide reaction in water?

If you have a metal hydroxide that reacts with water, will your net equation be oh- and h20 or 2h2o?
For example
MOH + H20 --> M+ + OH- + H2O
vs
MOH + H3O+ --> M+ H20?
Is this essentially saying the same thing because we are taking H3O+ out of solution to make H2O or is it different?
Sat Dec 07, 2019 5:24 pm
Forum: Bronsted Acids & Bases
Topic: Resonance and oxyacids?
Replies: 1
Views: 85

### Resonance and oxyacids?

When you have electron withdrawing groups and the oxyacids with more oxygen atom weaken the o-h bond and the H+ proton is removed, would the oxygen that was bonded to an H still have a - charge or will it form a double bond top stabilize the molecule with no formal charge?
Sat Dec 07, 2019 5:19 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Pka and Ph
Replies: 2
Views: 49

### Pka and Ph

Is the solution neutral when your Pka equals your ph? Is it acidic when your pka is greater than your ph? And would we say that when your pka is lower than your PH then your solution is basic or is it the opposite?
Tue Dec 03, 2019 9:08 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Do we need to know the formation constant?
Replies: 1
Views: 39

### Do we need to know the formation constant?

The book mentions the formation constant Kf for finding equilibrium for coordination compounds. Do we need to know how to set this up the same way as the acids and bases Ka constant with products over reactant?
Tue Dec 03, 2019 8:11 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands and lone pairs?
Replies: 2
Views: 50

### Ligands and lone pairs?

For each ligand to act as a lewis base, the more lone pairs it has to donate, the more sites it can bind to? So if an atom has 4 lone pairs, it would then be polydentate?
Sun Dec 01, 2019 5:27 pm
Forum: Bronsted Acids & Bases
Topic: Net Ionic Equations
Replies: 3
Views: 65

### Re: Net Ionic Equations

It will depend if the acid or base is weak or strong. If it dissociated completely, we will know it is strong and it does not it is weak
Sun Dec 01, 2019 5:26 pm
Forum: Bronsted Acids & Bases
Topic: naming
Replies: 4
Views: 65

### Re: naming

I think theres a table/chart in the book that we can use! You can also google some common ones for more help.
Sun Dec 01, 2019 5:23 pm
Forum: Conjugate Acids & Bases
Topic: NH3, acid or base?
Replies: 12
Views: 2746

### Re: NH3, acid or base?

I believe that NH3 is a base, specifically a weak base.
Sun Dec 01, 2019 5:22 pm
Forum: Conjugate Acids & Bases
Topic: Conjugate Base
Replies: 5
Views: 79

### Re: Conjugate Base

Due to strong acids being able to dissociate, the conjugate base will have no acidic properties at all, so it will be just basic.
Sun Dec 01, 2019 5:17 pm
Forum: Lewis Acids & Bases
Topic: bronsted vs lewis
Replies: 9
Views: 132

### Re: bronsted vs lewis

Bronsted acids are talking about proton donors/acceptors and lewis acids and bases refer to electron proton donors/acceptors.
Sun Nov 24, 2019 10:28 pm
Forum: Biological Examples
Topic: Drawing Structures on Final
Replies: 3
Views: 69

### Re: Drawing Structures on Final

I would assume that we should know how to draw the examples and how they bind to different ligands.
Sun Nov 24, 2019 10:27 pm
Forum: Biological Examples
Topic: Biological Examples
Replies: 10
Views: 88

### Re: Biological Examples

I think it would be helpful to know cisplatin as it was discussed in lecture as well as the hemoglobin example.
Sun Nov 24, 2019 10:26 pm
Forum: Biological Examples
Topic: Cisplatin
Replies: 8
Views: 77

### Re: Cisplatin

I think its due to the fact that cisplatin can bind 2 regions of the DNA and block cell replication. Even though it has side effects such as killing normal cells, it does effectively kill the cancer cells.
Sun Nov 24, 2019 9:54 pm
Forum: Naming
Topic: Coordination number
Replies: 7
Views: 59

### Re: Coordination number

Do the ligands only attach to transition metals? Why not an element that is not a transition metal?
Sun Nov 24, 2019 9:52 pm
Forum: Naming
Topic: Trans and Cis
Replies: 8
Views: 142

### Re: Trans and Cis

Cis would be when the 2 atoms bond are on the same side and trans is when they are on opposite sides
Tue Nov 19, 2019 8:29 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
Replies: 5
Views: 100

### Re: Dipole-Dipole

The molecule overall would be considered nonpolar so it would have no dipole-moments.
Sun Nov 17, 2019 3:13 am
Forum: Determining Molecular Shape (VSEPR)
Topic: T Shape Geometry
Replies: 2
Views: 47

### T Shape Geometry

Do we need to know T shaped geometry even if Dr. Lavelle didn’t go over it in lecture?
Fri Nov 15, 2019 5:32 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: Hydrogen Peroxide IMF
Replies: 1
Views: 36

### Hydrogen Peroxide IMF

Does geometry of molecules play a role in hydrogen bonding for example H2O2 being written out straight or in a bent formation?
Fri Nov 15, 2019 5:30 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: Would SO4 and H2O be dipole-induced dipole or dipole-dipole
Replies: 1
Views: 534

### Would SO4 and H2O be dipole-induced dipole or dipole-dipole

Let's say I want to name the intermolecular force between SO4 that is a nonpolar molecule but has bonds that their electronegativity difference is greater than 0.4 and we have water that has a net dipole, would we classify this as dipole-induced dipole or dipole-dipole
Fri Nov 15, 2019 4:39 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-induced dipole bond
Replies: 5
Views: 52

### Re: Dipole-induced dipole bond

Yes, typically this is the accepted value for nonpolar interactions. However, a molecule can still be nonpolar if the difference in electronegativity is greater than 0.4 but the polarity is symmetrical. This can be seen in molecules such as carbon dioxide. Let's say I want to name the intermolecula...
Fri Nov 15, 2019 4:19 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-induced dipole bond
Replies: 5
Views: 52

### Dipole-induced dipole bond

When we refer to nonpolar bonds are we saying that the the electronegativity difference has to be less than 0.4 to classify it as nonpolar?
Sun Nov 10, 2019 12:04 pm
Forum: Bond Lengths & Energies
Topic: polarizability
Replies: 9
Views: 83

### Re: polarizability

The size and charge of an ion determines its polarizability. The larger anion has a larger electron cloud that can be distorted and also has a lot of electrons shielding it from its nucleus therefore if another cation is close by its strong nuclear pull is going to attract the anions large electron ...
Sun Nov 10, 2019 11:56 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Sulfur bonding
Replies: 5
Views: 57

### Re: Sulfur bonding

Everything third row and beyond can have expanded octets because they have d shells that are available for them to use, therefore they can all have expanded octets.
Sun Nov 10, 2019 11:55 am
Forum: Determining Molecular Shape (VSEPR)
Topic: how to draw lewis structure
Replies: 9
Views: 430

### Re: how to draw lewis structure

It can be drawn in several different ways, but the best way to determine where the radical goes is to find the structure with the lowest charges on it.
Sun Nov 10, 2019 11:53 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Resonance Delocalization
Replies: 5
Views: 53

### Re: Resonance Delocalization

Delocalization means that electrons don't just surround one area such as near an atom or a single or double bond, they like around the molecule and spread out over the entire space
Sun Nov 10, 2019 11:50 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Resonance Delocalization
Replies: 5
Views: 53

### Re: Resonance Delocalization

Delocalization means that electrons don't just surround one area such as near an atom or a single or double bond, they like around the molecule and spread out over the entire space
Sun Nov 10, 2019 11:44 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Formal Charge
Replies: 9
Views: 742

### Re: Formal Charge

The most electronegative atom has the most negative charge on it, but when we want the lowest energy structure with the least amount of formal charges as possible.
Sun Nov 03, 2019 10:29 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Second Ionization energy
Replies: 1
Views: 33

### Second Ionization energy

Does second ionization energy mean that after the electron is first removed, what is the likelihood that the second will be removed as well for elements in the s block that have lower ionization energies than p block?
Sun Nov 03, 2019 10:24 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cu and Cr
Replies: 11
Views: 101

### Re: Cu and Cr

Yes this trend continues because it provides symmetry and the electrons would rather want to go into an orbital by itself rather than be next to another paired because they of e-e repulsion. Therefore, there is more stability and symmetry in half filled and full filled shells.
Sun Nov 03, 2019 10:22 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: isoelectronic definition
Replies: 7
Views: 92

### Re: isoelectronic definition

Liliana Aguas 3G wrote:It's when they have the same number of electrons and same electron configuration! Section 1F.3 explains it with some examples:)

So two elements would have to have the same number of electrons as well which would then be the same electron configurations for both?
Sun Nov 03, 2019 10:18 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configurations of ions
Replies: 4
Views: 100

### Re: Electron configurations of ions

I think it just helps you find which shells you are removing the electrons from. You don't have to write out the ground state configuration if a question doesn't ask but it just helps you make less mistakes especially when we get into the 4th row and remember that we remove electrons from the 4s ene...
Sun Nov 03, 2019 10:15 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Quantum Numbers and subshells
Replies: 2
Views: 51

### Re: Quantum Numbers and subshells

I think that for the purposes of this class we only cover the quantum numbers from l=0,1,2,3, 0 being s, 1 being p, 2 being d, and 3 being f. We don't really talk about the g and h, etc. subshells so we only go to l=3.
Sun Nov 03, 2019 10:13 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Degenerate orbitals?
Replies: 1
Views: 45

### Degenerate orbitals?

For hydrogen all of the subshells are considered degenerate but for multi-electron atoms is each orbital within each subshell degenerate ex: 2p all of the three orbitals are degenerate and for 3d all of the five orbitals are degenerate?
Sun Oct 27, 2019 12:09 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 11
Views: 153

### Re: Midterm

The midterm will cover fundametals, the quantum world, and chemical bonds, I believe!
Sat Oct 26, 2019 4:40 pm
Forum: Lewis Structures
Topic: Video Modules
Replies: 11
Views: 174

### Re: Video Modules

No I don't think so. I think he only uploads the high school fundamentals and quantum because they're the beginning topics we learn, the fundamentals as a refresher and the quantum since it is a bit more difficult to understand.
Sat Oct 26, 2019 11:22 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Calculating Effective Nuclear Charge
Replies: 1
Views: 30

### Calculating Effective Nuclear Charge

Do we need to know just the general concept of effective nuclear charge or we need to know how to calculate it as well Z(eff)-S (number of protons- number of shielding electrons
Fri Oct 25, 2019 5:51 pm
Forum: Photoelectric Effect
Topic: Increasing Light Intensity Photoelectric Effect
Replies: 7
Views: 88

### Increasing Light Intensity Photoelectric Effect

If we have a light that has sufficient energy to allow electrons to escape the surface of a metal, will changing the intensity (amplitude) of that particular light cause any effect on either the number of electrons being ejected or the kinetic energy that those electrons will have?
Wed Oct 23, 2019 11:58 pm
Forum: Properties of Light
Topic: Threshold Frequency
Replies: 5
Views: 82

### Re: Threshold Frequency

I believe Threshold Frequency is the amount of energy of a photon required to displace an electron on a metal surface. The photon needs to at least match the threshold, which will result in a kinetic energy of 0. Yes that part makes sense to me but when we're calculating the threshold frequency, is...
Wed Oct 23, 2019 11:45 pm
Forum: Properties of Light
Topic: Threshold Frequency
Replies: 5
Views: 82

### Threshold Frequency

Can someone clarify on the threshold frequency? Is it the work function times planck's constant?
Sun Oct 20, 2019 1:28 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 384

### Re: Unit for Wavelength

Typically I was told in discussion that wavelengths are given in nm but meters are used as well and picometers.
Sun Oct 20, 2019 1:26 pm
Forum: Properties of Electrons
Topic: mass of electron, proton, neutron
Replies: 7
Views: 101

### Re: mass of electron, proton, neutron

I believe the masses are provided on the contstants and equations sheet as I know were given the mass of an electron but maybe it would be could to memorize proton and neutron just in case it’s not on the sheet.
Sun Oct 20, 2019 1:17 pm
Forum: Properties of Light
Topic: Baler v. Lyman Series
Replies: 10
Views: 155

### Re: Baler v. Lyman Series

The Balmer series is where the electron falls from its state and goes to n=2 and its in the visible light spectrum. The Lyman series where the electron drops to n=1 and it is in the uv region
Sun Oct 20, 2019 1:14 pm
Forum: Administrative Questions and Class Announcements
Topic: KAREN SUN 5-7PM WORKSHOP - DOWNLAOD WORKSHEETS HERE
Replies: 53
Views: 3422

### Re: KAREN SUN 5-7PM WORKSHOP - DOWNLAOD WORKSHEETS HERE

Will the answers be posted for those of us who can’t attend the sessions to make sure we get the correct answer?
Sun Oct 20, 2019 12:00 pm
Forum: Student Social/Study Group
Topic: Homework for Week 4
Replies: 4
Views: 79

### Re: Homework for Week 4

I think because we’re still covering the quantum world I think we can still do 5 problems from that section
Sun Oct 13, 2019 6:41 pm
Forum: SI Units, Unit Conversions
Replies: 13
Views: 272

### Re: How to express answers

Dr. Lavelle hasn't mentioned if he prefers them in scientific notation or not, however I assume he wants us to know how to use it but questions don't specifically ask to format it into scientific notation so I don't we have to, it is just preferred. As for, sig figs my ta said on the exams they won'...
Sun Oct 13, 2019 6:28 pm
Forum: SI Units, Unit Conversions
Topic: Fundamentals L35
Replies: 5
Views: 136

### Re: Fundamentals L35

The T stands for tons so 1 ton is equal to 1,000 kg and then we use dimensional analysis to convert from kg to g by using 1 kg equals 1,000 grams.
Sun Oct 13, 2019 6:25 pm
Forum: SI Units, Unit Conversions
Replies: 6
Views: 187

There is no course reader for the class this year, just the textbook.
Sun Oct 13, 2019 6:18 pm
Forum: SI Units, Unit Conversions
Topic: Unit conversion
Replies: 15
Views: 529

### Re: Unit conversion

The simplest way would be to convert from the units given to the base which would be meters and from meters to angstroms or if another unit is given such as pm concert to m then angstroms.
Sun Oct 13, 2019 12:24 am
Forum: SI Units, Unit Conversions
Topic: Weekly Posts
Replies: 7
Views: 112

### Re: Weekly Posts

I am pretty sure Dr. Lavelle said to get the posts in by Sunday, assuming its by the end of the night so 11:59 pm
Sun Oct 06, 2019 12:58 am
Forum: SI Units, Unit Conversions
Topic: Sig Fig Mistakes
Replies: 17
Views: 312

### Re: Sig Fig Mistakes

The sig fig rules depend on if a certain amount of them are given in the problem, if they are then your final answer should contain the same amount of sig figs, if they are not then depending on multiplying/division you use the sig figs of the smallest number for your answer and for addition and sub...
Sun Oct 06, 2019 12:55 am
Forum: SI Units, Unit Conversions
Topic: which unit to use
Replies: 9
Views: 204

### Re: which unit to use

I think it is best to keep the units given unless they specially ask for a conversion or ask for different units. If they don't ask you to do that then it is prob best to keep the same units they gave you.
Sun Oct 06, 2019 12:51 am
Forum: SI Units, Unit Conversions
Topic: Rounding
Replies: 6
Views: 111

### Re: Rounding

Usually, I will keep the full number in my calculator to be as accurate as possible but for my work I will usually go to 5 sig figs or 4 and then I will round my answer towards the end.
Sun Oct 06, 2019 12:47 am
Forum: SI Units, Unit Conversions
Topic: How many Sig Figs are necessary?
Replies: 4
Views: 86

### Re: How many Sig Figs are necessary?

The Zeros before the 1 do not count. Therefore to get 5 sig figs, you must add a 0 after the five to make it significant so no rounding is necessary here.
Sun Oct 06, 2019 12:39 am
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 177
Views: 13467

### Re: Advice from a Medical Student - Part II[ENDORSED]

Loved reading about your experience! Thank you for sharing this with us but I was wondering what kept you motivated to keep going? I know a lot of people just give up because it is too difficult from or switch career paths because they think they're not able to continue with medicine.