Search found 66 matches

by Emily_Stenzler_3H
Wed Nov 25, 2020 9:59 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8223
Views: 1435313

Re: Post All Chemistry Jokes Here

A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."
by Emily_Stenzler_3H
Wed Nov 25, 2020 9:56 pm
Forum: Student Social/Study Group
Topic: Finals!
Replies: 43
Views: 204

Re: Finals!

Is the final going to be in the same format as the midterms with only multiple choice?
by Emily_Stenzler_3H
Wed Nov 25, 2020 9:55 pm
Forum: General Science Questions
Topic: Grading Scale Chem 14A
Replies: 10
Views: 63

Re: Grading Scale Chem 14A

Ralph Zhang 2L wrote:Yeah I do not think this class is curved. You need a raw scre of 90% to get an A.

So a 90% will not be an A-, it will be an A?
by Emily_Stenzler_3H
Wed Nov 25, 2020 9:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Tests
Replies: 4
Views: 42

Tests

Does anyone know what the 14B tests will look like? Will they be weekly? I know that I sometimes get behind on lectures when studying for midterms in other classes, so I am not always 100% up to date with current class content until the weekend. Will we need to be keeping up/ fully understanding eac...
by Emily_Stenzler_3H
Wed Nov 25, 2020 9:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bonds
Replies: 4
Views: 16

Bonds

Can someone explain why the number of bonds between atoms does not impact molecular shape (please correct me if this is incorrect). I thought triple bonds were much shorter than single bonds, so wouldn't this impact the overall shape of a molecule?
by Emily_Stenzler_3H
Wed Nov 25, 2020 9:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Atom Angles
Replies: 3
Views: 27

Atom Angles

The concept of the angles between the atoms changing based on electron lone pairs etc. makes sense, but does anyone know how exactly scientists discovered these angle measurements? Were these angles every actually measured, or are they assumed to be what they are based on other experimental observat...
by Emily_Stenzler_3H
Mon Nov 23, 2020 10:58 pm
Forum: Limiting Reactant Calculations
Topic: Combustion
Replies: 8
Views: 32

Re: Combustion

I believe this is just something we have to memorize for this class- we just need to know the typical products and reactants for a combustion reaction, and we need to know that O2 is usually in excess.
by Emily_Stenzler_3H
Mon Nov 23, 2020 10:55 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8223
Views: 1435313

Re: Post All Chemistry Jokes Here

Optimist: The glass is half full.

Pessimist: The glass is half empty.

Chemist: The class contains
50% H2O (l)
39% N2 (g)
10.5% O2 (g)
0.44% Ar (g)
0.06 % CO2 (g)
by Emily_Stenzler_3H
Mon Nov 23, 2020 10:49 pm
Forum: Lewis Structures
Topic: Dot stucture
Replies: 11
Views: 36

Re: Dot stucture

To add on to these explanations, I find it helpful to divide by 2 after finding the total number of electrons. This will tell you how many total bonds/ pairs of lone electrons there will be.
by Emily_Stenzler_3H
Thu Nov 19, 2020 9:11 pm
Forum: Dipole Moments
Topic: Dipole representation on midterm 2
Replies: 9
Views: 79

Re: Dipole representation on midterm 2

I am only familiar with the first diagram, as Dr. Lavelle has used this one quite a few times. However, can anyone explain the second diagram? Is it representing the pull of electrons? This is from the textbook showing how "In the original convention, a dipole was represented by an arrow that ...
by Emily_Stenzler_3H
Thu Nov 19, 2020 8:24 pm
Forum: Ionic & Covalent Bonds
Topic: Radicals
Replies: 10
Views: 46

Radicals

For question 2C.1 in the textbook, it asks if CH3 is a radical. When counting up the electrons I counted 7 (4+1+1+1), which is uneven, so I determined CH3 to be a radical. The textbook says it is not a radical because the electron count is even. Can someone please tell me what I am missing here?
by Emily_Stenzler_3H
Thu Nov 19, 2020 11:02 am
Forum: Lewis Structures
Topic: lewis structures of compounds
Replies: 2
Views: 12

lewis structures of compounds

When writing lewis structure for compounds, how do we know when it will be 'one structure' vs. a structure with [] (for example (ignoring electrons) Na+[Cl-O]- vs a structure like that of methanol, which is all 'one' more complex structure)
by Emily_Stenzler_3H
Wed Nov 18, 2020 9:49 pm
Forum: Resonance Structures
Topic: Resonance Structure + Energy
Replies: 2
Views: 22

Resonance Structure + Energy

Why do resonance structures exist where some structures have higher energy than others. Wouldn't the atom rather be in the structure with the lowest energy? Does this have to do with the fact that resonance structures are a hybrid and a hybrid of these structures would have lower energy than the low...
by Emily_Stenzler_3H
Wed Nov 18, 2020 9:43 pm
Forum: Electronegativity
Topic: Electronegativity Trends
Replies: 4
Views: 28

Electronegativity Trends

How would we determine which element has a higher/ lower electronegativity if one element is one 'block' further to the right while the other is one 'block' up? For example, if we were looking at N and S, which would have the higher electronegativity and why?
by Emily_Stenzler_3H
Wed Nov 18, 2020 9:35 pm
Forum: Ionic & Covalent Bonds
Topic: Ion Question
Replies: 1
Views: 16

Ion Question

In the textbook, descriptions were provided for the tendencies of metals and nonmetals to either lose of gain electrons when forming ions. Since metalloids carry properties of both metals and nonmetals, which of these tendencies would the follow? Are metalloids simply considered nonmetals, even thou...
by Emily_Stenzler_3H
Wed Nov 18, 2020 9:32 pm
Forum: Properties of Electrons
Topic: Spin States and Ground State
Replies: 2
Views: 30

Spin States and Ground State

How would we determine if an atom is in excited or ground state from the spin states of its electrons?
by Emily_Stenzler_3H
Wed Nov 18, 2020 9:31 pm
Forum: Resonance Structures
Topic: Resonance Structures Conceptual Question
Replies: 1
Views: 18

Resonance Structures Conceptual Question

I am having a bit of trouble conceptualizing how (correct me if this is wrong) molecules do not take on a single resonance structure, but are instead a hybrid of these resonance structures. What would this look like? Why can't these molecules be accurately modeled with a 'typical' lewis structure an...
by Emily_Stenzler_3H
Tue Nov 17, 2020 9:09 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Effective Nuclear Charge
Replies: 2
Views: 14

Effective Nuclear Charge

1.E.5 (d) in the textbook reads: Zeffe for an electron in a p-orbital is lower than for an electron in an s-orbital in the same shell, and the answer is true. I am confused- I was thinking if an electron is closer to the nucleus and has less shielding, then the effective nuclear charge would be lowe...
by Emily_Stenzler_3H
Mon Nov 16, 2020 3:20 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Valence Electron Question
Replies: 3
Views: 36

Valence Electron Question

Can someone explain how to determine the number of valence electrons an element has for elements that are not 'main group' elements? When does the rule where group 13 elements have 3 valence electrons (group 14 have 4 and so on) begin?
by Emily_Stenzler_3H
Sun Nov 15, 2020 5:29 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Spin State
Replies: 7
Views: 35

Spin State

Does anyone know how the value 1/2 was determined to be used for spin state ( since spin state can only be +1/2 or -1/2)? Does this value have any significance ?
by Emily_Stenzler_3H
Sun Nov 15, 2020 3:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atomic orbitals + probability
Replies: 1
Views: 10

Atomic orbitals + probability

I know this has been asked now a couple times but I'm still a bit unclear if there's a definitive answer-

Does anyone know exactly how much we need to know in regard to the following learning objective from outline 2?

-Describe the interpretation of atomic orbitals in terms of probability.
by Emily_Stenzler_3H
Sun Nov 15, 2020 12:06 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Outline 2 Orbital Question
Replies: 4
Views: 39

Re: Outline 2 Orbital Question

Will we have to know how to calculate orbital angular momentum for midterm 2?
by Emily_Stenzler_3H
Sun Nov 15, 2020 9:25 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Writing Electron Configurations
Replies: 9
Views: 41

Writing Electron Configurations

In Justin's UA session, he wrote the electron configuration for Cd+2 as [Kr]4d^105s^2. I think I must be missing something- I thought we always write electron configurations in order from s, p and d. Can someone explain why this is not the case?
by Emily_Stenzler_3H
Sun Nov 15, 2020 9:18 am
Forum: Ionic & Covalent Bonds
Topic: Hydrogen and Covalent Bonds
Replies: 3
Views: 13

Hydrogen and Covalent Bonds

Can someone explain why covalent bonds are consistently stronger than hydrogen bonds? Will even the weakest of covalent bonds still be stronger than a hydrogen bond?
by Emily_Stenzler_3H
Sun Nov 15, 2020 9:14 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Question
Replies: 12
Views: 96

Midterm 2 Question

Since zoom and respondus did not work for the last midterm, do we still need to have zoom on our laptop and phone before beginning the test? Or can we just log into zoom on our external webcam?
by Emily_Stenzler_3H
Fri Nov 13, 2020 1:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Question for Students about High School Chem
Replies: 25
Views: 105

Re: Question for Students about High School Chem

I took honors chem and, like others here, feel that I have basic knowledge for most of the topics taught in this class. I do feel that Lavelle teaches the background enough that we can succeed without having taken AP Chem.
by Emily_Stenzler_3H
Mon Nov 09, 2020 11:28 pm
Forum: Lewis Structures
Topic: C Valence Electrons
Replies: 5
Views: 18

C Valence Electrons

Can someone explain how C has 4 valence electrons (I'm looking at the Sapling exercise that says this). I thought the group number tells you the number of valence electrons, and C is in group 2.
by Emily_Stenzler_3H
Mon Nov 09, 2020 2:05 pm
Forum: Ionic & Covalent Bonds
Topic: Electronegativity vs. Electron Affinity vs. Ionization Energy
Replies: 6
Views: 28

Electronegativity vs. Electron Affinity vs. Ionization Energy

Can someone please explain the difference between electronegativity, electron affinity and ionization energy? Thanks!
by Emily_Stenzler_3H
Sun Nov 08, 2020 9:57 pm
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 207

Re: Mid-quarter Check in

I'm actually really loving this class, but the workload along with other classes/ extracurriculars has been quite overwhelming. I hope you all are doing well!
by Emily_Stenzler_3H
Sun Nov 08, 2020 9:52 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 137
Views: 450

Re: Favorite TV shows

The Office is such a classic. How much you enjoy it really depends on your type of humor but it has some great writing and acting :)
by Emily_Stenzler_3H
Sun Nov 08, 2020 9:50 pm
Forum: Ionic & Covalent Bonds
Topic: Electron Affinity
Replies: 8
Views: 50

Re: Electron Affinity

I believe the main idea we need to understand from electron affinity is that it refers to an atom's likelihood of gaining an electron. The more negative an atom's electron affinity is, the greater attraction that atom has for an electron (keep in mind that energy is released every time an electron i...
by Emily_Stenzler_3H
Thu Nov 05, 2020 12:57 pm
Forum: Lewis Structures
Topic: Lewis Structure Question
Replies: 4
Views: 21

Lewis Structure Question

Can someone explain why bonds are represented as having different lengths in the lewis structure if this is incorrect? What part of the Lewis structure means the bonds are different lengths? Why are they interpreted in this way; if we know the bonds don't differ in length then why don't we just inte...
by Emily_Stenzler_3H
Wed Nov 04, 2020 5:36 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic Bonding Question
Replies: 6
Views: 46

Ionic Bonding Question

I believe this was in lecture but I somehow missed it and can't find it anymore so I just wanted to confirm- elements on the periodic table that are further apart from each other are more likely to form an ionic bond, correct? From my understanding, these elements would have very different electron ...
by Emily_Stenzler_3H
Tue Nov 03, 2020 8:37 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Element orbital representation
Replies: 4
Views: 53

Element orbital representation

Why are the last two orbitals shown in some cases (in lecture it's written Sc: [Ar]3d^1,4s2) rather than just the last orbital (4S^2)? Isn't it only really important to know how many unpaired electrons are in the outermost shell?
by Emily_Stenzler_3H
Tue Nov 03, 2020 5:52 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Inner Core
Replies: 4
Views: 53

Inner Core

Can someone explain the whole 'inner core' idea that is discussed in lecture? For example, Lavelle writes elements as Ca:[Ar]4S^2

I am confused what the inner core is, what use it has in this notation, and how it is determined

thank you!
by Emily_Stenzler_3H
Thu Oct 29, 2020 9:02 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Bohr frequency question
Replies: 2
Views: 36

Bohr frequency question

Just to confirm- Is the Bohr frequency equation all from the 'perspective' of the electron? For example, if the electron is going to a lower energy level and is therefore releasing energy, the change would be negative since the electron is losing energy?
by Emily_Stenzler_3H
Thu Oct 29, 2020 8:14 pm
Forum: Properties of Electrons
Topic: Photon/ Electron Interaction
Replies: 5
Views: 27

Photon/ Electron Interaction

When a photon does not have enough energy to excite an electron to the next energy level, is there any interaction at all between the photon and electron? I am trying to conceptualize- where does the photon 'go' after the interaction/ failing to excite the electron?
by Emily_Stenzler_3H
Thu Oct 29, 2020 4:19 pm
Forum: Properties of Electrons
Topic: Electron Energy
Replies: 2
Views: 39

Electron Energy

If a question indicates that an electron has a velocity, do we automatically know that there will be Kinetic energy?
by Emily_Stenzler_3H
Thu Oct 29, 2020 2:15 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: En and E
Replies: 3
Views: 36

En and E

Just to confirm- En is not the same as E correct? So we could not use E=hv when finding the wavelength after using the Rydberg equation? Can someone clarify the difference between the two?

Thanks!
by Emily_Stenzler_3H
Thu Oct 29, 2020 1:49 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Sapling Rydberg Question
Replies: 4
Views: 39

Re: Sapling Rydberg Question

I believe the mistake you made was switching n1 and n2. Since energy is released when the electron is moving down, the electron is going from n=6 down to n=5. This means that n1 = 6 and n2 = 5, which should lead to a positive number. That makes sense thank you! So will n1 always be the "initia...
by Emily_Stenzler_3H
Thu Oct 29, 2020 1:15 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Sapling Rydberg Question
Replies: 4
Views: 39

Sapling Rydberg Question

I have been working on the sapling question for quite a while now, and can't seem to get a reasonable answer for the 'lower' wavelength. I have pasted the question below: The electron in a hydrogen atom is excited to the n=6 shell and emits electromagnetic radiation when returning to lower energy le...
by Emily_Stenzler_3H
Wed Oct 28, 2020 7:44 am
Forum: Limiting Reactant Calculations
Topic: Textbook Fund. Problem M11
Replies: 2
Views: 20

Textbook Fund. Problem M11

Textbook problem M11 reads as follows: A reaction vessel contains 5.77 g of white phosphorus and 5.77 g of oxygen. The first reaction to take place is the formation of phosphorus(III) oxide, P4O6: P4(s) 1 3 O2(g) S P4O6(s). If enough oxygen is present, the oxygen can react further with this oxide to...
by Emily_Stenzler_3H
Sat Oct 24, 2020 9:10 pm
Forum: Significant Figures
Topic: Sig Fig Question
Replies: 8
Views: 62

Sig Fig Question

In the textbook, I noticed numbers are sometimes written with a decimal at the end and no following digits, such as 350. pm. Is this to indicate that we should be using 3 sig figs instead of two (in this case)? Does that decimal make 350 3 sig figs instead of 2?
by Emily_Stenzler_3H
Wed Oct 21, 2020 11:06 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Entanglement
Replies: 1
Views: 46

Entanglement

Today in lecture, Dr. Lavelle said light interacting with an electron is a rather complex interaction called "entanglement". Could anyone explain a bit about this interaction? I am curious :)
by Emily_Stenzler_3H
Wed Oct 21, 2020 2:15 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Variables in Rydberg Equation
Replies: 5
Views: 38

Re: Variables in Rydberg Equation

In the textbook problem 1.A.15, v=c/lamda is used to find n2. Is the frequency (v) the same thing as energy level (n)? No, they are two completely different entities. Frequency (v) is referring the the frequency of the photon that is emitted. Energy level (n) is referring to the energy level of the...
by Emily_Stenzler_3H
Wed Oct 21, 2020 2:08 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Variables in Rydberg Equation
Replies: 5
Views: 38

Variables in Rydberg Equation

In the textbook problem 1.A.15, v=c/lamda is used to find n2. Is the frequency (v) the same thing as energy level (n)?

edit: I figured out my misconception! answered below :-)
by Emily_Stenzler_3H
Wed Oct 21, 2020 1:19 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Balmer and Lyman series
Replies: 2
Views: 22

Balmer and Lyman series

I am a bit confused why electrons in the Balmer series always have a ground state of n=1, while those in Lyman series always have a ground state of n=1. In the lyman series, the wavelengths are lower than those in the Balmer series. However, I remember Lavelle saying that going to n=1 is always the ...
by Emily_Stenzler_3H
Tue Oct 20, 2020 9:17 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 11
Views: 92

Re: Rydberg Equation

For the Balmer series the electron will always be going to n=2. In order for a line to be in the Balmer series, the electron must end at n=2, meaning that is its final state. It does not matter where it comes from, it can come from any n level (n=2,3,4, etc. like said in the textbook), it only need...
by Emily_Stenzler_3H
Tue Oct 20, 2020 9:15 pm
Forum: Student Social/Study Group
Topic: How do you study?
Replies: 19
Views: 115

Re: How do you study?

Hey Nicolette! I hope you are doing well despite having to start college from home :/ The biggest thing I wish I had known my freshman year is to take 'necessary notes' during lecture. Often times students are so busy trying to jot down everything the professor is saying/ everything on the slides th...
by Emily_Stenzler_3H
Tue Oct 20, 2020 9:11 pm
Forum: Student Social/Study Group
Topic: Midterm Fundamentals Review Sheet
Replies: 7
Views: 67

Re: Midterm Fundamentals Review Sheet

this is wonderful! thank you!!
by Emily_Stenzler_3H
Tue Oct 20, 2020 9:09 pm
Forum: Student Social/Study Group
Topic: Study tips?
Replies: 9
Views: 51

Study tips?

I have been attempting to do the lectures, one lavelle discussion section, sapling, almost every workshop, textbook problems and modules each week but this has been a bit hard to keep up with. How have you all been studying for this class? I am worried about falling behind since I am having some tro...
by Emily_Stenzler_3H
Tue Oct 20, 2020 9:06 pm
Forum: Properties of Light
Topic: Speed of light
Replies: 25
Views: 136

Speed of light

I have been using 3.00*10^8 for the speed of light, but I noticed the textbook uses 2.998*10^8. I was thinking this would be determined based on sig figs but the question I'm looking at in the textbook (example 1A.1) has 2 sig figs for the numbers in the question. How do we know which to use? It sou...
by Emily_Stenzler_3H
Tue Oct 20, 2020 8:59 pm
Forum: Properties of Light
Topic: Midterm
Replies: 42
Views: 368

Re: Midterm

Does anyone know if we can use our ipads to do our work on the midterm? I know this is probably a long shot with how far they've gone to prevent cheating but my TA didn't seem to think it was totally out of the question. Has anyone else's TAs said anything about this?
by Emily_Stenzler_3H
Tue Oct 20, 2020 8:54 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 11
Views: 92

Rydberg Equation

The textbook says "The balmer series consists of the lines with n1=2 (and n2=3,4, etc). I'm a bit confused- why are the values of n2 changing but the value of n1 stays the same? What are each of these variables representing? How do we know which value to use for n2?
by Emily_Stenzler_3H
Fri Oct 16, 2020 3:53 pm
Forum: Properties of Light
Topic: Light Having wave and photoelectric properties
Replies: 3
Views: 45

Light Having wave and photoelectric properties

I am a bit confused because I thought the Photoelectric effect was significant because it demonstrated that scientists were using the wrong model for light when they were modeling it as a wave, but Lavelle still addresses light as having wavelength properties. Can someone clear this up please? Does ...
by Emily_Stenzler_3H
Fri Oct 16, 2020 3:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4382

Re: Step Up Sessions

Are step up sessions or workshop sessions better for understanding material that may be on exams? Can I still attend workshop sessions if I don't have a strong background in chemistry? You can definitely still attend workshop sessions even if you don't have a strong background in chemistry. I did n...
by Emily_Stenzler_3H
Fri Oct 16, 2020 2:56 pm
Forum: SI Units, Unit Conversions
Topic: 10^?
Replies: 2
Views: 49

Re: 10^?

I may be misinterpreting your question, but you determine the power based on how many decimals you moved either to the left or right. For example, 65,000,000 becomes 6.5 x 10^7 because you moved back 7 decimal places and would therefore need to multiply 6.5 by 10,000,000 to get 65,000,000.
by Emily_Stenzler_3H
Fri Oct 16, 2020 2:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Webcams
Replies: 2
Views: 18

Re: Webcams

My TA allowed us to use our phones as second webcams if we did not have access to an actual webcam today. I believe she said this option will also be available on the midterm.
by Emily_Stenzler_3H
Fri Oct 16, 2020 2:50 pm
Forum: Photoelectric Effect
Topic: When are electrons excited vs ejected
Replies: 16
Views: 117

Re: When are electrons excited vs ejected

One of the UAs also said to visualize the following: if any energy is inputted, the electrons will be 'vibrating' and moving around. Once the energy input is equal to or greater than the work function, then the electrons will be fully ejected from the metal they were on.
by Emily_Stenzler_3H
Sun Oct 11, 2020 11:46 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4382

Re: Step Up Sessions

Is there typically a worksheet given at these sessions? I went week 1 and it was basically office hours, but I'm guessing this was just because it was too early in the week for a content worksheet. Does anyone know if it's gotten more structured?
by Emily_Stenzler_3H
Sun Oct 11, 2020 8:58 pm
Forum: Significant Figures
Topic: When to use Sig Figs
Replies: 8
Views: 43

Re: When to use Sig Figs

I believe it depends on how small/ large the number actually is. If it is a number like .055, then I believe it is find to write it like this. But if the answer is 0.000000005, then it is much more realistic to use scientific notation. I believe it is just a judgement call based on the size of the a...
by Emily_Stenzler_3H
Sun Oct 11, 2020 8:54 pm
Forum: Balancing Chemical Reactions
Topic: Order of Balancing Rxns
Replies: 23
Views: 102

Re: Order of Balancing Rxns

I try to save molecules that originally have one component, such as O2 or F2. These can easily be modified however needed at the end because you don't have to worry about changing the amount of any other atoms. Molecules with more components are typically harder to balance because you have to keep t...
by Emily_Stenzler_3H
Sun Oct 11, 2020 8:45 pm
Forum: Significant Figures
Topic: All students read this sig fig post [ENDORSED]
Replies: 133
Views: 17433

Re: All students read this sig fig post [ENDORSED]

Do sig figs (and how many sig figs should be in the final answer) have any real applications in a chemistry lab? Or is this simply something we do for practice when showing calculations?
by Emily_Stenzler_3H
Sun Oct 11, 2020 8:41 pm
Forum: SI Units, Unit Conversions
Topic: Showing Unit Conversions in work
Replies: 7
Views: 72

Showing Unit Conversions in work

When TAs have gone over problems that require unit conversion, they include this in the work of the overall calculation, instead of converting before writing out the final calculation. For example, (1000 ml/ l) would be shown in the calculation. Are we required to do this on tests, or can we simply ...
by Emily_Stenzler_3H
Sun Oct 11, 2020 8:36 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 178
Views: 34495

Re: Final Jitters

Does anyone know how to calm down your anxieties before you take this final? Since having test anxiety can be very distracting while you're trying to study or even while you're taking the test itself. Open to any tips:) This may not be as applicable in quarantine, but going to the CAE with your con...

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