Search found 70 matches

by Sarah Huang 3A
Sat Dec 12, 2020 5:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Electron Geometry
Replies: 8
Views: 71

Re: Electron Geometry

Electron geometry would be the classification of the shape based on both the number of lone pairs and the bonded atoms, so the total regions of electron density. So, for example, a CCl-3 molecule (I don't know if that is real). would have a single bond between the chlorine and the carbon, and the ca...
by Sarah Huang 3A
Sat Dec 12, 2020 5:05 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular vs. Formula Units
Replies: 2
Views: 37

Molecular vs. Formula Units

As I was reviewing, I realized that the book differentiated molecular and formulaic units, can someone explain the difference to me and provide an example so I could know how to calculate them each? Or are they the same?
by Sarah Huang 3A
Wed Dec 09, 2020 8:53 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: HClO3
Replies: 2
Views: 7

HClO3

I was looking through the Sapling and when they gave me the list of storng acids and bases, they said that HClO3 was a strong acid for them, but that other universities consider it a weak acid. In this class, would it be a strong or weak acid?
by Sarah Huang 3A
Mon Dec 07, 2020 11:13 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Group 1,2, and Metalloids don't affect acidity?
Replies: 2
Views: 14

Group 1,2, and Metalloids don't affect acidity?

Can someone explain to me as to why the Group 1, 2, and Metalloids do not affect the acidity of certain compounds?
by Sarah Huang 3A
Mon Dec 07, 2020 11:11 am
Forum: Conjugate Acids & Bases
Topic: Conjugate Acids and Bases
Replies: 4
Views: 45

Conjugate Acids and Bases

Can someone please explain to me how you would make a molecule, such as NH3, its conjugate base or conjugate acid?

I've been quite confused by this topic so I'd be happy if someone could explain this to me, thoroughly, thank you!
by Sarah Huang 3A
Thu Dec 03, 2020 3:29 pm
Forum: Naming
Topic: Ferrate or iron?
Replies: 8
Views: 54

Re: Ferrate or iron?

Thank you so much!
by Sarah Huang 3A
Thu Dec 03, 2020 2:00 am
Forum: Naming
Topic: Ligands
Replies: 3
Views: 22

Re: Ligands

Hi Stacey, Unfortunately, there aren't a certain set of ligands that we should strictly memorize... but there is table in the textbook that you can make flashcards from to memorize all the ligands. I know that it is a lot, but there is no narrowed list, but there are definitely common ones such as N...
by Sarah Huang 3A
Thu Dec 03, 2020 1:57 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Number
Replies: 14
Views: 105

Re: Finding Coordination Number

How do you calculate the coordination number? I'm really lost. Hi America! This is long, but I promise this could help! I know exactly how you feel, and I just found out how to do the coordination number with the help of the step-up sessions, so let me give you a few examples, and I hope that will ...
by Sarah Huang 3A
Thu Dec 03, 2020 1:40 am
Forum: Naming
Topic: Memorizing ligand names
Replies: 6
Views: 60

Re: Memorizing ligand names

For the final exam, will we be allowed to have the ligand name sheet with us? If not, are we supposed to remember the Lewis structures of very complex ligands like edta and long ligands like en? Hi Victor! From what I have heard from other UAs and TAs, we are supposed to know the ligand names and m...
by Sarah Huang 3A
Thu Dec 03, 2020 1:37 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Sapling wk 9 #2 coordination number
Replies: 2
Views: 33

Re: Sapling wk 9 #2 coordination number

Hello! Can someone explain to me how I can determine the coordination compound number of Ba[FeBr4]2 and K3[CoF6]? I am stuck with how to draw the lewis structures of these compounds to find the coordination number, especially with the 3 Potassiums. Thank you! Hi Dana! So when considering the coordi...
by Sarah Huang 3A
Thu Dec 03, 2020 1:20 am
Forum: Naming
Topic: Ferrate or iron?
Replies: 8
Views: 54

Ferrate or iron?

When we are naming the coordination complexes, when do we know to use ferrate or iron(ate) for the naming of the metal?
I know ironate looks weird, but I saw it on a practice problem with a UA.

I'd really appreciate it if someone could explain this to me!
by Sarah Huang 3A
Sat Nov 28, 2020 9:47 pm
Forum: Octet Exceptions
Topic: Expanded Octet Question
Replies: 8
Views: 77

Re: Expanded Octet Question

Can someone explain the concept of expanded octet. Why can Xe in XeF4 have an expanded octet? What qualities of Xe permit this?
 Hi Noelle! So from one of Dr. Lavelle's previous lectures, an expanded octet can only occur if an atom's energy level is greater than or equal to 3. You may have seen thi...
by Sarah Huang 3A
Sat Nov 28, 2020 9:39 pm
Forum: Sigma & Pi Bonds
Topic: Delocalized Pi bond
Replies: 6
Views: 54

Re: Delocalized Pi bond

Hi guys! I’m still a bit confused on this but can someone explain what makes a delocalized pi bond and what makes it different from a regular pi bond? Hi Melody! I was also confused on this when I first saw it as well, but after answering the question and reading the solution to it, it became more ...
by Sarah Huang 3A
Sat Nov 28, 2020 9:34 pm
Forum: Hybridization
Topic: Multiple Bonds with Hybridization
Replies: 6
Views: 44

Re: Multiple Bonds with Hybridization

Why do double and triple bonds not affect hybridization? For example, why is a molecule with 4 single bonds and a molecule with 3 single bonds and one double bond both sp 3 ? Going off of what the others have said, the type of bond does not affect hybridization because it is based off of regions of...
by Sarah Huang 3A
Sat Nov 28, 2020 9:27 pm
Forum: Lewis Structures
Topic: Angles of Bonding Pairs
Replies: 8
Views: 78

Re: Angles of Bonding Pairs

I'd have to agree with Emily. I understand your concern, but I do believe that we only need to know the general angles of all the bonds in relation to their hybridization and how their angles change from lower or higher based on the lone pairs.
by Sarah Huang 3A
Sat Nov 28, 2020 9:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: pi and sigma bonds
Replies: 17
Views: 121

Re: pi and sigma bonds

How can we determine the number of pi and sigma bonds a molecule has ? One quick way to determine the amount of sigma bonds or pi bonds a molecule has to see the type of bond the molecule has. I know that with the introduction of VSEPR, it is a little difficult to understand what I am implying when...
by Sarah Huang 3A
Mon Nov 23, 2020 10:05 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489318

Re: Post All Chemistry Jokes Here

Why did the Wicked Witch of the West dissolve upon contact with water?

Because she was hella salty.


(Ionic bonds dissolve in water...:) )
(You may sue me later)
by Sarah Huang 3A
Sun Nov 22, 2020 6:44 pm
Forum: Hybridization
Topic: hybridization
Replies: 2
Views: 41

Re: hybridization

I am still confused on how hybridization works. For instance, when would there be a sp3d orbital or an sp2 orbital? Hi Natalie! I know that hybridization seems very confusing, and it was for me at first! You would know when there is a sp3d orbital when there are a total of five bonds attached to th...
by Sarah Huang 3A
Sun Nov 22, 2020 6:29 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Character
Replies: 33
Views: 239

Re: Covalent Character

How can you determine which ionic molecules display the greatest covalent character? Is it just by comparing their respective electronegativities or is there another factor that you must consider. Hi! If a question were to ask you which ionic molecules displayed the greatest covalent character, you...
by Sarah Huang 3A
Sun Nov 22, 2020 6:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Week 7-8 #1
Replies: 8
Views: 28

Re: Sapling Week 7-8 #1

Predict the molecular shape of the sulfite ion Screenshot (12).png linear trigonal planar (120 degrees) bent tetrahedral trigonal pyramidal Using the hybridization and angles chart, you would be able to see that the steric number is 3 since it is a total of three bonds, and with no lone pairs, it w...
by Sarah Huang 3A
Sun Nov 22, 2020 6:20 pm
Forum: Lewis Structures
Topic: # of electrons in expanded valence
Replies: 6
Views: 53

Re: # of electrons in expanded valence

So if a question asks to find the number of the electrons in the expanded valence, does that mean the total number of valence electrons or is it just the number of electrons after the 8? I'm not sure if my question makes total sense but I was so confused about this question on the MT Hey Ali! Usual...
by Sarah Huang 3A
Sat Nov 21, 2020 10:34 am
Forum: Coordinate Covalent Bonds
Topic: What is a coordinate Covalent Bond
Replies: 11
Views: 108

What is a coordinate Covalent Bond

I was looking through lecture 16 the other day, and Dr. Lavelle used the term coordinate covalent bond, but i don't think I have a great grasp on that concept... May someone explain it to me?
by Sarah Huang 3A
Sun Nov 15, 2020 11:39 pm
Forum: Lewis Structures
Topic: Sapling weeks 5/6 Question 4
Replies: 6
Views: 79

Re: Sapling weeks 5/6 Question 4

Okay, I've gotten to the last part of this question where there is a table with bond lengths. I'm not sure what ample & overwhelming bond character mean. Hi Jacquelyn! so, in this question, ample just means sufficient or enough to be deemed to have this bond character while overwhelming would b...
by Sarah Huang 3A
Sun Nov 15, 2020 11:38 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent Bonds
Replies: 9
Views: 60

Ionic vs Covalent Bonds

Hi!

As we've been going through this unit/module, I've been wondering when you know a bond is ionic or covalent when you are drawing a Lewis structure? Like I know the H2O is a covalent bond and that NaCl is an ionic bond, but how would you know for other molecules?
by Sarah Huang 3A
Sun Nov 15, 2020 6:48 pm
Forum: Lewis Structures
Topic: Sapling weeks 5/6 Question 4
Replies: 6
Views: 79

Re: Sapling weeks 5/6 Question 4

Okay, I've gotten to the last part of this question where there is a table with bond lengths. I'm not sure what ample & overwhelming bond character mean. Hi Jacquelyn! so, in this question, ample just means sufficient or enough to be deemed to have this bond character while overwhelming would b...
by Sarah Huang 3A
Sun Nov 15, 2020 6:44 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 format?
Replies: 9
Views: 98

Re: Midterm 2 format?

Is the midterm going to be harder than the last? Also is it going to be multiple choice? Hi Samin! I think whether the upcoming midterm is going to be harder or not is up to the person and whether or not they were able to grasp the concepts better for this section or not compared to the last, so it...
by Sarah Huang 3A
Sun Nov 15, 2020 6:40 pm
Forum: Dipole Moments
Topic: Sapling #13 Hydrogen Bonds
Replies: 5
Views: 52

Re: Sapling #13 Hydrogen Bonds

Hi! Question 13 on Sapling Learning gives a lewis structure of urea CO(NH2)2 and asks how many hydrogen bonds it can form with water molecules. I thought it was 6 which included hydrogen bonds that formed with the 2 nitrogen atoms and the 4 hydrogen atoms of urea, but sapling says the answer is 8. ...
by Sarah Huang 3A
Sun Nov 15, 2020 6:23 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 186

Re: bond length

are we supposed to know how to calculate bond length? if so what equation or how do we do that? thank you Hi Tiffany! In this class, we do not need to calculate the actual bond length, as it is usually given, both the theoretical and the experimentally observed one. However, we will be asked on the...
by Sarah Huang 3A
Sun Nov 15, 2020 6:14 pm
Forum: Lewis Structures
Topic: Lewis acids and Bases
Replies: 20
Views: 121

Re: Lewis acids and Bases

How do you classify if a compound is a Lewis acid or base when given the chemical formula? Hi Michael! I had the same issue that you had in classifying the compounds, especially in Sapling. However, a quick note that might make it easier for you is that lewis acids are atoms that accept or take ele...
by Sarah Huang 3A
Sat Nov 14, 2020 9:52 am
Forum: Quantum Numbers and The H-Atom
Topic: Textbook Problems 1D.1 and 1E.1
Replies: 2
Views: 36

Re: Textbook Problems 1D.1 and 1E.1

Hi, so for 1D1, we are going from 1s to 2p. a) The energy of the electron will increase because we are moving to a higher energy level. b) Because we're going from n =1 to n=2, we see that the value of n increases. c) The value of l increases because l = 0 is s and l = 1 is p. d) Since we're moving...
by Sarah Huang 3A
Sat Nov 14, 2020 9:50 am
Forum: Lewis Structures
Topic: Sapling HW Regarding Drawing CH2O
Replies: 2
Views: 27

Re: Sapling HW Regarding Drawing CH2O

Yes thank you! I did eventually figure it out shortly after I posted that question, but thank you!
by Sarah Huang 3A
Fri Nov 13, 2020 11:50 pm
Forum: Quantum Numbers and The H-Atom
Topic: Textbook Problems 1D.1 and 1E.1
Replies: 2
Views: 36

Textbook Problems 1D.1 and 1E.1

Hello! I am having trouble understanding both 1D1 and 1E1 from the textbook homework problems. Would someone mind explaining it to me?
by Sarah Huang 3A
Sun Nov 08, 2020 10:56 pm
Forum: Lewis Structures
Topic: Sapling HW Regarding Drawing CH2O
Replies: 2
Views: 27

Sapling HW Regarding Drawing CH2O

I've been trying to use the tools they gave me to draw the structure, and I am pretty sure I have it, but it keeps telling me that it is incorrect. Would someone mind helping me figure it out?
by Sarah Huang 3A
Sun Nov 08, 2020 10:48 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: S and P electrons
Replies: 14
Views: 115

Re: S and P electrons

Why do p electrons have a higher energy than s electrons? Hi! I have one way to explain it, but it takes a little bit of imagination! So, if you remember from the previous lectures where we discussed equations with Rydberg's constant and energy levels, we drew the diagrams where n = 1 (1s), n = 2 (...
by Sarah Huang 3A
Sun Nov 08, 2020 10:40 pm
Forum: Ionic & Covalent Bonds
Topic: Difference Between Ionic & Covalent Bonds
Replies: 11
Views: 65

Re: Difference Between Ionic & Covalent Bonds

Ionic and covalent bonds were discussed during the lectures, but I was wondering if anyone could explain to me the difference between ionic and covalent bonds? I also wanted to know if certain elements form ionic/covalent bonds? Hi Jason! Unlike ionic bonds, covalent bonds share electrons and usual...
by Sarah Huang 3A
Sun Nov 08, 2020 10:29 pm
Forum: Ionic & Covalent Bonds
Topic: Atomic Radius
Replies: 38
Views: 258

Re: Atomic Radius

Can someone explain why the atomic radius decreases as you move across a period? If there are more electrons shouldnt electron-electron repulsion push them farther away, making the radius larger? Hi Norah! I originally had the same misconception as well! However, the reason why atomic radius decrea...
by Sarah Huang 3A
Sun Nov 08, 2020 10:21 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 40
Views: 2094

Re: Noble Gases

Noble gases are not counted for their electronegativity because unlike the other elements, they have a perfect octet, so it would be unfavorable for them to gain another electron.
by Sarah Huang 3A
Sun Nov 01, 2020 9:25 pm
Forum: Trends in The Periodic Table
Topic: Sapling Question (Radius)
Replies: 10
Views: 68

Re: Sapling Question (Radius)

When you're looking at the radius of three of the same elements, but each with different charges, you have to look at electrons, the one with the most electrons, so the Cs with the negative charge would have the largest radius... with that knowledge, do you think you could order the rest? When order...
by Sarah Huang 3A
Sun Nov 01, 2020 8:50 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground state electron configuration?
Replies: 9
Views: 47

Re: Ground state electron configuration?

Thank you, everyone! That clarified a lot for me!
by Sarah Huang 3A
Sun Nov 01, 2020 8:44 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Sapling #4
Replies: 8
Views: 76

Re: Sapling #4

HI! I was able to do the first part of this question by finding the work function but I can't seem to figure out the second question: "A metal was exposed to photons at a frequency of 1.11x10^-15 s^-1, electrons were emitted with a maximum kinetic energy of 3.60x10^-19 J. Calculate the work fu...
by Sarah Huang 3A
Sun Nov 01, 2020 8:30 pm
Forum: Quantum Numbers and The H-Atom
Topic: Sapling HW number 25
Replies: 3
Views: 58

Re: Sapling HW number 25

John, thank you so much!
by Sarah Huang 3A
Sun Nov 01, 2020 7:49 pm
Forum: SI Units, Unit Conversions
Topic: Sapling WEEK 4 #22
Replies: 5
Views: 56

Re: Sapling WEEK 4 #22

Hello! I can't seem to get the right answer to this question. Could someone help explain how they solved? You use an electron microscope in which the matter-wave associated with the electron beam has a wavelength of 0.0431 nm. What is the kinetic energy of an electron in the beam, expressed in elec...
by Sarah Huang 3A
Sun Nov 01, 2020 11:39 am
Forum: Quantum Numbers and The H-Atom
Topic: Nodal Planes
Replies: 10
Views: 72

Re: Nodal Planes

I really liked how Khoa explained this, but yes, nodal planes are areas where there is a zero possibility of finding an electron. With Schrodinger's equation, it combines De Broglie's wave properties and Heisenberg's indeterminacy equation to describe a wave function. When psi(the triton symbol) is ...
by Sarah Huang 3A
Sun Nov 01, 2020 11:34 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground state electron configuration?
Replies: 9
Views: 47

Ground state electron configuration?

I've been watching the lecture videos for this week, but can someone explain to me what Dr. Lavelle means, or what it means in chemistry when we stay "ground state"?
by Sarah Huang 3A
Mon Oct 26, 2020 1:19 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: What n1 and n2 represents in the Rydberg Equation?
Replies: 9
Views: 112

Re: What n1 and n2 represents in the Rydberg Equation?

In the Rydberg equation, is n1 always the initial and n2 always the final? or is n1 always just the lowest energy value and n2 the highest? Hi Annabelle! if you are using the frequency is equal to Rydberg's constant((1/(n162)) - (1/(n2^2))), then yes, n1 will always be the initial quantum energy le...
by Sarah Huang 3A
Mon Oct 26, 2020 12:09 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Sapling Homework Spectral Lines
Replies: 1
Views: 45

Sapling Homework Spectral Lines

"The electron in a hydrogen atom is excited to the n=6 shell and emits electromagnetic radiation when returning to lower energy levels. Determine the number of spectral lines that could appear when this electron returns to the lower energy levels, as well as the wavelength range in nanometers.&...
by Sarah Huang 3A
Sun Oct 25, 2020 10:26 pm
Forum: SI Units, Unit Conversions
Topic: Do I need to do very single textbook question on the syllabus?
Replies: 34
Views: 280

Re: Do I need to do very single textbook question on the syllabus?

Hello! Although you do not have to do every single question, it is highly recommended that you try to do every single one that has been assigned because Dr.Lavelle did assign them for us to have a better understanding of the concepts. Not only that, but some questions on the big exams can also be si...
by Sarah Huang 3A
Sun Oct 25, 2020 10:21 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: What n1 and n2 represents in the Rydberg Equation?
Replies: 9
Views: 112

Re: What n1 and n2 represents in the Rydberg Equation?

In the Rydberg equation, is n1 always the initial and n2 always the final? or is n1 always just the lowest energy value and n2 the highest? Hi Annabelle! if you are using the frequency is equal to Rydberg's constant((1/(n162)) - (1/(n2^2))), then yes, n1 will always be the initial quantum energy le...
by Sarah Huang 3A
Sun Oct 25, 2020 10:00 pm
Forum: Photoelectric Effect
Topic: Frequency and energy
Replies: 15
Views: 78

Re: Frequency and energy

Yes! Energy and Frequency do have a "positive correlation". If you look at the equation E = hv (energy is equal to plank's constant times frequency), you can see that Energy is directly proportional to frequency. What does that mean? Well it means that if the frequency increases, then so d...
by Sarah Huang 3A
Sun Oct 25, 2020 9:46 pm
Forum: Empirical & Molecular Formulas
Topic: Midterm - Chemical compund equations?
Replies: 7
Views: 60

Re: Midterm - Chemical compund equations?

Thank you everyone! Yes that is very helpful on clarification, so thank you!
by Sarah Huang 3A
Thu Oct 22, 2020 8:07 pm
Forum: Empirical & Molecular Formulas
Topic: Midterm - Chemical compund equations?
Replies: 7
Views: 60

Midterm - Chemical compund equations?

Hello! A couple of peers and myself were wondering if we were supposed to know how to construct formulas for certain chemical compounds, or know the formulas by heart for the midterm? I just want to know the extent of how much should we know because I know that when I was going through the fundament...
by Sarah Huang 3A
Tue Oct 20, 2020 7:56 am
Forum: Quantum Numbers and The H-Atom
Topic: Sapling HW number 25
Replies: 3
Views: 58

Sapling HW number 25

Hi everyone! I was wondering if anyone can explain how to use the quantum numbers for n, l and ml because I am lost on how to use them. I know that l has 0,1,2,3, which correspond with s,p,d,f, but how do you determine ml? Since I don't have a great understanding of this concept, I can't really do t...
by Sarah Huang 3A
Sun Oct 18, 2020 11:40 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's #
Replies: 31
Views: 384

Re: Avogadro's #

To be honest, I have the same question as you! For the most part, I know that when a question, like from Fundamental E, asks you to give an answer in atoms, you would have to use Avogadro's number to convert. Avogadro's number(or constant, whichever you'd like to call it) is a "universal" ...
by Sarah Huang 3A
Sun Oct 18, 2020 6:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Exam format
Replies: 1
Views: 16

Re: Exam format

Hi Meghan! For the exams, since we have to have external webcams and everything, I think that the test is going to be with paper and pen, and we'll be given a specific time limit to complete the exam and then turn it in by scanning and putting it into a PDF format. Dr. Lavelle will most likely adjus...
by Sarah Huang 3A
Sun Oct 18, 2020 1:23 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular vs. Formula Units
Replies: 5
Views: 79

Re: Molecular vs. Formula Units

This definitely does help more with my understanding, but can someone explain to me how you could calculate them as well? Like if were to have an example, would someone be able to walk me through it? I know it is a long process to type out, but I would really appreciate it! Yes of course! If you ha...
by Sarah Huang 3A
Sun Oct 18, 2020 1:16 pm
Forum: Properties of Light
Topic: Frequency vs Wavelength
Replies: 22
Views: 165

Re: Frequency vs Wavelength

Hey everyone I have a clarification question. I know that we organize and separate waves by their wavelength, but does the frequency have any effect on what type of wave it is? I understand what each term means and its significance to solving equations, but I was just wondering if frequency has a d...
by Sarah Huang 3A
Sun Oct 18, 2020 12:55 pm
Forum: Limiting Reactant Calculations
Topic: Difference between limiting reactant and limiting reagent?
Replies: 14
Views: 132

Re: Difference between limiting reactant and limiting reagent?

As everyone else has stated above, both of them are used interchangeably, so they're practically synonyms in this case. They are calculated the same way, so don't worry if you see either or on an exam! Just do what you know, and it'll be the same answer for either one.
by Sarah Huang 3A
Sun Oct 18, 2020 12:52 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular vs. Formula Units
Replies: 5
Views: 79

Re: Molecular vs. Formula Units

This definitely does help more with my understanding, but can someone explain to me how you could calculate them as well? Like if were to have an example, would someone be able to walk me through it? I know it is a long process to type out, but I would really appreciate it!
by Sarah Huang 3A
Sat Oct 17, 2020 11:11 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1377

Re: How are you studying?

I plan on reviewing my notes from past lectures and doing the textbook questions while attending step up sessions! I think it really helps to review or catch up on the weekend, even if it is overwhelming. Reaching out for help and finding someone to hold you accountable is a great idea as well!
by Sarah Huang 3A
Sat Oct 17, 2020 11:09 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular vs. Formula Units
Replies: 5
Views: 79

Molecular vs. Formula Units

I know that we are currently reviewing quantum, but can someone explain to me the difference between molecular units and formula units? I do not understand the difference nor do I know how to get them...
by Sarah Huang 3A
Mon Oct 12, 2020 3:27 pm
Forum: Significant Figures
Topic: Establishing Significant Figures
Replies: 8
Views: 95

Re: Establishing Significant Figures

Ryan and Eva, that was definitely some really good extra explanation! I didn't really know that either because I only knew the riles, but I didn't know about the significance of their meaning. Thank you!
by Sarah Huang 3A
Sun Oct 11, 2020 8:36 pm
Forum: SI Units, Unit Conversions
Topic: Showing Work
Replies: 8
Views: 51

Re: Showing Work

I don't think Lavelle has specified, like many others have stated. But if you want to be safe, do include the units in your work or conversions. Not to mention, even if it is not mandatory, it is still good practice to do so because it helps clarify your work if you ever want to look back at it or i...
by Sarah Huang 3A
Sun Oct 11, 2020 8:28 pm
Forum: Significant Figures
Topic: Establishing Significant Figures
Replies: 8
Views: 95

Re: Establishing Significant Figures

Hi there, While I understand that the number 5000 only has one significant figure, I do not understand the rationale as to why this is. What makes the number "5000." consist of four significant figures while 5000 has only one? Not an entirely relevant question, just something that I had b...
by Sarah Huang 3A
Tue Oct 06, 2020 1:49 pm
Forum: SI Units, Unit Conversions
Topic: E23A and E23C
Replies: 6
Views: 69

Re: E23A and E23C

Ohh... that makes so much more sense!! Thank you very much Ben! You helped a lot!
by Sarah Huang 3A
Tue Oct 06, 2020 12:11 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489318

Re: Post All Chemistry Jokes Here

Hydrogen: Hey Helium, mind sharing an electron, for old times sake? Y'know, since sharing is caring?

Helium: um...... no.

Hydrogen: Well that's not very noble of you.




I'm sorry, that may have been a terrible jokes xD
by Sarah Huang 3A
Tue Oct 06, 2020 12:04 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489318

Re: Post All Chemistry Jokes Here

Situation: Two chemists walk into Kemist Bar. They sit at the table and the bartender asks for their drinks. The first chemist asks for H2O, and the second chemist said "I'll have H2O, too!" The bartender came back with their drinks and the first chemist quenched thier thirst and went to t...
by Sarah Huang 3A
Mon Oct 05, 2020 11:54 pm
Forum: Balancing Chemical Reactions
Topic: Stoichemetric Coeffiecients
Replies: 12
Views: 141

Re: Stoichemetric Coeffiecients

Hi, just watched the lecture for today and was wondering if when balancing equations there will ever be a time where having non-whole numbers (ex. 13/2 or 8.5) will be acceptable? Also on tests will points be deducted if you don't have all whole numbers in the balance equation? Thank you! Just like...
by Sarah Huang 3A
Mon Oct 05, 2020 11:36 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E.1 Nanotechnology
Replies: 3
Views: 67

Re: E.1 Nanotechnology

E.1 The field of nanotechnology offers some intriguing possibilities, such as the creation of fibers one atom wide. Suppose you were able to string together 1.00 mol Ag atoms, each of radius 144 pm, into one of these fibers by encapsulating them in carbon nanotubes. How long would the fiber extend?...
by Sarah Huang 3A
Mon Oct 05, 2020 11:15 pm
Forum: SI Units, Unit Conversions
Topic: E23A and E23C
Replies: 6
Views: 69

Re: E23A and E23C

Yes, thank you!!! That helped a lot! But I was wondering, How did you know to use the ratios?
by Sarah Huang 3A
Mon Oct 05, 2020 4:00 pm
Forum: SI Units, Unit Conversions
Topic: E23A and E23C
Replies: 6
Views: 69

E23A and E23C

I've done this problem a few times already, but I think I am converting something wrong? Can someone explain this question for me? Or walk me through? I would really appreciate it!

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