Search found 55 matches

by Sid Panda 2A
Mon Nov 23, 2020 9:20 am
Forum: Sigma & Pi Bonds
Topic: Sigma and Pi Bonds
Replies: 9
Views: 47

Re: Sigma and Pi Bonds

Hello, I'm still having trouble visualizing what sigma and pi bonds are, and identifying them in Lewis Structures. In a sapling problem, I just counted the single bonds as a sigma bond, double bonds as 1 sigma 1 pi bond, and triple bonds as 1 sigma 2 pi bonds, and I got the right answer. Is this re...
by Sid Panda 2A
Mon Nov 23, 2020 9:11 am
Forum: Student Social/Study Group
Topic: Studying From Home
Replies: 91
Views: 291

Re: Studying From Home

Personally, I find it difficult to study at home. Before corona, I used to go to cafes or libraries, but due to obvious reasons I haven't been able to do that lately. Any tips on how to stay focused from home? I like to use an app called "Forest" (it's free on android, idk about ios. Ther...
by Sid Panda 2A
Mon Nov 23, 2020 8:56 am
Forum: Student Social/Study Group
Topic: Effective Studying Strategies/Resources
Replies: 6
Views: 25

Re: Effective Studying Strategies/Resources

Hey, Has anyone done exceptionally well on both midterms? If so, what were some strategies that have helped you the most? Are there any specific resources that you refer to--aside from the hw and text-book problems? Thanks! Not sure about doing exceptionally well lol, but doing the textbook problem...
by Sid Panda 2A
Mon Nov 23, 2020 8:52 am
Forum: Octet Exceptions
Topic: Expanded octets
Replies: 2
Views: 20

Re: Expanded octets

Hello! I believe an expanded octet of a central can expand to how many valence electrons it has in its outer shell. For example, phosphorus has 5 valence electrons, thus it can expand to 10 electrons with 5 lone paired electrons. This is my take on it. If anyone has a better explanation, I would ap...
by Sid Panda 2A
Mon Nov 23, 2020 8:31 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Place Lone Pair Electrons on Axial Position in Octahedral Arrangement? [ENDORSED]
Replies: 2
Views: 29

Re: Place Lone Pair Electrons on Axial Position in Octahedral Arrangement? [ENDORSED]

I know that for molecules with 5 regions of electron density in the trigonal bipyramidal arrangement, lone pairs would be placed in one of the equatorial positions so it repels two atoms instead of three. I am wondering why, when there are 6 regions of electron density in an octahedral arrangement,...
by Sid Panda 2A
Mon Nov 16, 2020 4:09 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Midterm 2 Textbook Topics
Replies: 3
Views: 24

Re: Midterm 2 Textbook Topics

I was going over my textbook notes and reviewing old topics from the quantum world outline that were said to be covered on midterm 2. Within this section, I had trouble understanding the concepts in section 1D.1 (Energy Levels) and 1E.1 (Orbital Energies) and they didn't seem to be in any of the le...
by Sid Panda 2A
Mon Nov 16, 2020 4:07 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability and Polarizing Power
Replies: 4
Views: 39

Re: Polarizability and Polarizing Power

Hi! Does anyone have a good way to remember what makes an atom/ion more polarizable and which atoms/ions have more polarizing power? I'm having a little trouble with those concepts. For atoms that are more polarizable, the bigger the atom is = the more polarizable. I like to remember this by thinki...
by Sid Panda 2A
Mon Nov 16, 2020 4:02 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Aufbau Order
Replies: 5
Views: 21

Re: Aufbau Order

For one of the problems in the book for outline 3 (problem #3, part b in section 2A), it asks us to write the ground state electron configuration for As^3+ . For my answer I put [Ar]3d^10 4s^2, but the book has the solution as [Ar]4s^2 3d^10. Does the order I put my answer in matter? Or do both of ...
by Sid Panda 2A
Mon Nov 16, 2020 3:52 pm
Forum: Octet Exceptions
Topic: Xenon Textbook 2C.11
Replies: 2
Views: 21

Re: Xenon Textbook 2C.11

They have more orbitals accessible to them. Any element that is in the p-block and is period 3 or lower (4,5,6) have access to the D orbitals which allows the elements to have an extended octet Agree with this answer. Also, wanted to add on that it is pretty common for these elements to have an exp...
by Sid Panda 2A
Mon Nov 16, 2020 3:50 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Valence Electron Question
Replies: 3
Views: 36

Re: 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? For transition metals, the valence electrons can vary. The rule...
by Sid Panda 2A
Wed Nov 11, 2020 6:51 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: Polarizing power for Cations
Replies: 1
Views: 14

Polarizing power for Cations

Does Li+ have more polarizing power than Mg2+? Or, is it the other way around? I'm asking because Li+ is a smaller molecule, which has a more densely packed e- cloud than Mg2+. But, on the other hand, Mg2+ has a greater charge magnitude than Li+.

How can we tell the difference?
by Sid Panda 2A
Mon Nov 09, 2020 6:36 am
Forum: Lewis Structures
Topic: Sapling HW Regarding Drawing CH2O
Replies: 2
Views: 25

Re: Sapling HW Regarding Drawing CH2O

Sarah Huang 3A wrote: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?



I'm not sure what your structure might be looking like, but this is what I got for that question.
by Sid Panda 2A
Mon Nov 09, 2020 6:34 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground state
Replies: 1
Views: 15

Re: Ground state

I think it was mentioned in a lecture that Pauli's exclusion principle and Hund's rule can be used to find the ground state electron configuration. I'm still a little confused by finding configurations, so what is this process and how are these involved? Hi Sarah, It is best to look at the Pauli Ex...
by Sid Panda 2A
Mon Nov 09, 2020 6:22 am
Forum: Octet Exceptions
Topic: Photoinduced Reaction
Replies: 1
Views: 19

Re: Photoinduced Reaction

I feel like there hasn't been a lot of discussion about photoinduced reactions. It is defined as the cleavage of a bond by shining light to break the bond, which leads to the formation of radicals. Is this the only way that radicals can be produced or can they also be formed by changing the atom nu...
by Sid Panda 2A
Mon Nov 09, 2020 6:12 am
Forum: Sigma & Pi Bonds
Topic: Recommended Videos
Replies: 3
Views: 49

Re: Recommended Videos

Is there any videos anyone recommends watching to help solve problems that deal with Sigma & Pi Bonds that relates to what will be on the midterm and final. Organic Chemistry Tutor has a pretty good video about sigma/pi bonds. I've put it down below. He also has a ton of practice problems in hi...
by Sid Panda 2A
Mon Nov 09, 2020 6:02 am
Forum: Lewis Structures
Topic: Electron configurations and lewis structures
Replies: 1
Views: 16

Re: Electron configurations and lewis structures

Phosphorus is an atom in the third row on the periodic table and has s,p,d as its possible subshells. Why can it have a possible d-subshell when the electron configuration does not include a d-orbital? The Lewis structure of PCl shows P having 5 single bonds, for a total of 10 valence electrons. So...
by Sid Panda 2A
Sun Nov 08, 2020 6:45 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cations and Anions
Replies: 4
Views: 15

Re: Cations and Anions

In Lavelle's lecture about ionic and covalent bonds, he discussed how one side of the periodic table forms cations and the other forms anions. Why does this occur? This happens because some atoms have an easier time losing electrons to get to an octet, while others have an easier time gaining elect...
by Sid Panda 2A
Sun Nov 08, 2020 6:39 pm
Forum: Resonance Structures
Topic: Delocalized Electrons
Replies: 2
Views: 15

Re: Delocalized Electrons

I am still confused as to how delocalization works exactly. So are the electrons being equally shared between each element. The benzene example is always what comes to mind, but I cannot think of any other examples of this occurring. Yes, for benzene the electrons are shared equally by all of carbo...
by Sid Panda 2A
Sun Nov 08, 2020 6:34 pm
Forum: Trends in The Periodic Table
Topic: Calculating the charge of an element/molecule
Replies: 3
Views: 17

Re: Calculating the charge of an element/molecule

Hi, How do you calculate the charge of an element and molecule? Is knowing the charge on a element just based on memorization? If so, do you have any tips for memorizing the charges of specific elements? The charge of an element is the # of protons - # of electrons. For example, a chlorine atom tha...
by Sid Panda 2A
Thu Nov 05, 2020 1:11 pm
Forum: Resonance Structures
Topic: Resonance Question
Replies: 4
Views: 26

Re: Resonance Question

What does it mean when a question asks "which Lewis structure contributes significantly to the structure of the atom"? Thank you! Some resonance structures are "better" than others. What does it mean to be "better?" The best resonance structure is the one that has the ...
by Sid Panda 2A
Mon Nov 02, 2020 7:18 am
Forum: Student Social/Study Group
Topic: How to relax
Replies: 97
Views: 377

Re: How to relax

music and videogames
by Sid Panda 2A
Mon Nov 02, 2020 7:15 am
Forum: Student Social/Study Group
Topic: Post Midterm Blues
Replies: 71
Views: 449

Re: Post Midterm Blues

it's all part of the process :) We'll get through it!
by Sid Panda 2A
Mon Nov 02, 2020 7:14 am
Forum: Ionic & Covalent Bonds
Topic: Differences in structures between ionic and covalent bonds
Replies: 7
Views: 69

Re: Differences in structures between ionic and covalent bonds

Darren1e wrote:can someone simply explain why one is stronger than the other.


I agree with the post above me. Ion-ion interactions are much stronger than any other type of intermolecular force(dipole-dipole, London Dispersion, etc).
by Sid Panda 2A
Mon Nov 02, 2020 7:10 am
Forum: Administrative Questions and Class Announcements
Topic: Sapling Week 5/6 HW
Replies: 2
Views: 44

Re: Sapling Week 5/6 HW

So, this morning I clicked the link on CCLE for the Sapling HW for this week, and the website came up with the message, "Sorry, this activity is currently hidden". I was just wondering when it will open or if this is just a me problem. Seeing the same thing. I think Dr. Lavelle will make ...
by Sid Panda 2A
Mon Nov 02, 2020 7:01 am
Forum: General Science Questions
Topic: orbitals
Replies: 2
Views: 32

Re: orbitals

I am still having troubling figuring out the key concepts of orbitals. can someone give me a brief overview of orbitals or atleast where should I start to better understand the topic. - Orbitals are functions that are probabilities of "states" that electrons can have (this probably sounds...
by Sid Panda 2A
Tue Oct 27, 2020 8:51 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Textbook problem Quantum World 1A 15
Replies: 2
Views: 24

Re: Textbook problem Quantum World 1A 15

For this equation it asks for the n's when given 102.6 I know that ni(initial) is one. lol, so i really need help with this problem. I keep doing it and i'm doing all the steps people are telling me but I keep getting the wrong answer. I used this equation to get energy E=hc/λ which is 1.937x10^-18...
by Sid Panda 2A
Tue Oct 27, 2020 7:21 am
Forum: Properties of Light
Topic: Sapling Question 22
Replies: 5
Views: 59

Re: Sapling Question 22

Heather Szeszulski 1I wrote:Do I need to convert the mass of the electron from kg to g?


No, mass should remain in kg because Plancks constant uses Joules, which is kg*m^2 / s^2.
by Sid Panda 2A
Tue Oct 27, 2020 7:19 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Limit on delta x?
Replies: 1
Views: 36

Re: Limit on delta x?

Hi, I hope all is well. I just watched the audio-visual focus module on the heisenberg indeterminacy equation and noticed that Dr. Lavelle said that the delta v (uncertainty in velocity) must be less than the speed of light. Thus, I was also wondering if there was a limit on the uncertainty in posi...
by Sid Panda 2A
Mon Oct 26, 2020 5:10 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Wave Function Quantum Numbers
Replies: 11
Views: 89

Re: Wave Function Quantum Numbers

Can anybody help explain the relationship the quantum numbers n, l, and m have with each other? • n= energy + size of orbital (ex. the "2" in 2s, or the "3" in 3d) • L (Angular momentum) = what type of orbital ○ Value can be from 0,1,2,3… n-1 ○ L=0 (s), l=1 (p), l=2 (d), l=3(f) ...
by Sid Panda 2A
Mon Oct 26, 2020 5:05 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Degenerate Orbitals
Replies: 2
Views: 24

Re: Degenerate Orbitals

Are degenerate orbitals just orbitals with the same energy? Is hydrogen the only atom that will have degenerate orbitals because its a one electron system? Yes, degenerate orbitals have the same energy in the subshell level. As in, 2s, 2p would be of the same level, but not orbitals in different en...
by Sid Panda 2A
Mon Oct 26, 2020 4:57 pm
Forum: Properties of Light
Topic: Sapling Question 22
Replies: 5
Views: 59

Re: Sapling Question 22

You use an electron microscope in which the matter wave associated with the electron beam has a wavelength of 0.0397 nm. What is the kinetic energy of an electron in the beam, expressed in electron volts? I have done this question so many times and keep getting it wrong. I am using the formula lamb...
by Sid Panda 2A
Mon Oct 26, 2020 4:50 pm
Forum: DeBroglie Equation
Topic: Diffraction Pattern
Replies: 9
Views: 59

Re: Diffraction Pattern

Can someone explain what a diffraction pattern is exactly? Hi Lily, A diffraction pattern is a pattern that is caused by a wave. It usually looks like a bunch of straight lines. These straight lines ocur because waves can interfere with each other and cause them to "cancel" out or amplify...
by Sid Panda 2A
Mon Oct 26, 2020 1:58 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Valence Electrons in the d-block?
Replies: 1
Views: 31

Valence Electrons in the d-block?

How do we figure out the valence electrons in the d-block? Let me give the example of Scandium. Why does Scandium have 3 valence electrons? Shouldn't it be just 1 because the 3d orbital has only one electron "filled" with it? Or, would the valence electrons be 2 because the outermost shell...
by Sid Panda 2A
Wed Oct 21, 2020 8:49 am
Forum: Photoelectric Effect
Topic: Absorption of a photon
Replies: 4
Views: 34

Re: Absorption of a photon

In the photoelectric effect, if the energy of the photon is less than the threshold energy (work function), no electrons are ejected. Does that mean the photon just passes through the metal or does it still get absorbed with no electron ejection? I think that it could excite an electron in the meta...
by Sid Panda 2A
Tue Oct 20, 2020 12:49 pm
Forum: Properties of Light
Topic: Tips to memorize wavelengths of the spectrum
Replies: 7
Views: 57

Re: Tips to memorize wavelengths of the spectrum

I know we have to memorize the order of the spectrum (microwave --> gamma rays), but we also have to know the wavelengths of each one. Any tips on how to memorize that? I don't think we need to know specific wavelengths except that visible light falls under 400(violet)-700 (red) nm. Anything above ...
by Sid Panda 2A
Tue Oct 20, 2020 12:44 pm
Forum: Properties of Electrons
Topic: Sapling Q 4 Part 2
Replies: 3
Views: 20

Re: Sapling Q 4 Part 2

What is the max. number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 4.25*10^-7 J? I understand that you have to divide the energy of one photon by the total energy to get the maximum number of electrons but how would i ge...
by Sid Panda 2A
Tue Oct 20, 2020 12:41 pm
Forum: Quantum Numbers and The H-Atom
Topic: Textbook Question 1B.15
Replies: 3
Views: 22

Re: Textbook Question 1B.15

Can someone please explain how to do this question? Thank you! To solve part a, I think you would have to use the DeBroigle Equation to solve for the wavelength of the electron, which is wavelength e- = h/(m e- * v e- ). For part b, you would have to use the equation E=h*v, and plug in 2.50*10^16 H...
by Sid Panda 2A
Tue Oct 20, 2020 12:33 pm
Forum: Properties of Electrons
Topic: Question about HW 1A.3 | "extent of change in the electrical field"
Replies: 1
Views: 25

Question about HW 1A.3 | "extent of change in the electrical field"

The question in the textbook is: Which of the following happens when the frequency of electromagnetic radiation decreases? Explain your reasoning. (a) The speed of the radiation decreases. (b) The wavelength of the radiation decreases. (c) The extent of the change in the electrical field at a given ...
by Sid Panda 2A
Mon Oct 19, 2020 10:20 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1A.15 Empirical Equation
Replies: 7
Views: 50

Re: 1A.15 Empirical Equation

Hello everyone! I was scrolling through this forum and I know that there are a LOT of different posts about this question. I was just wondering if anyone had tried solving it using the empirical formula, E_n = -hR/n^2, rather than Rydberg's equation, V = -R[1/n_1^2 - 1/n_2^2]. I'm trying to do it t...
by Sid Panda 2A
Thu Oct 15, 2020 8:02 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Energy gap
Replies: 4
Views: 38

Re: Energy gap

Dr Lavelle drew a diagram when he was explaining the energy levels in H-atoms. he said that all spectral lines showing up in the UV region involve the energy gap n=1 and n=2. Why is this? Is it because it has the highest energy difference? Yes you are correct. The highest energy difference is betwe...
by Sid Panda 2A
Thu Oct 15, 2020 7:56 am
Forum: Photoelectric Effect
Topic: Frequency vs. Intensity
Replies: 16
Views: 99

Re: Frequency vs. Intensity

Hi! In the lecture, Dr. Lavelle mentioned that high intensity light would not emit electrons, but higher frequency light would. What's the difference between frequency and intensity? If you are talking about light as particles (photons), increasing the intensity of light only increases the number o...
by Sid Panda 2A
Tue Oct 13, 2020 11:02 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenbery Indeterminacy Equation
Replies: 2
Views: 24

Re: Heisenbery Indeterminacy Equation

Sarah_Hoffman_2H wrote:What exactly does the Indeterminacy Equation represent? I was watching the module and I am still sort of confused.


Another very good conceptual explanation of this principle.


by Sid Panda 2A
Tue Oct 13, 2020 10:53 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenbery Indeterminacy Equation
Replies: 2
Views: 24

Re: Heisenbery Indeterminacy Equation

What exactly does the Indeterminacy Equation represent? I was watching the module and I am still sort of confused. It's basically an equation that tells us that it is almost impossible to determine exactly the position AND the momentum of a very small particle, such as an electron, in an atom at th...
by Sid Panda 2A
Tue Oct 13, 2020 10:28 am
Forum: Properties of Light
Topic: Increasing energy of photon
Replies: 6
Views: 55

Re: Increasing energy of photon

On Monday's lecture, I understood that you must increase the energy of each photon to remove one electron, and that intensity would not effect the energy. What does effect the energy? Is there an equation for the energy of a photon? Hi Arya, From what I saw in the lecture, the frequency of the ligh...
by Sid Panda 2A
Tue Oct 13, 2020 10:20 am
Forum: Quantum Numbers and The H-Atom
Topic: Orbital Hybridization and Quantum Numbers
Replies: 3
Views: 75

Re: Orbital Hybridization and Quantum Numbers

When an atom, say Carbon, hybridizes to sp3, sp2, or sp, does the original set of quantum numbers for an noncovalently bonded C atom still apply to the hybridized Carbon? Or, do we use a different method to depict/describe the electrons in hybridized orbitals of a certain atom in a molecule? Hi, He...
by Sid Panda 2A
Tue Oct 13, 2020 9:45 am
Forum: Balancing Chemical Reactions
Topic: Mixed Numbers
Replies: 7
Views: 83

Re: Mixed Numbers

Can someone explain how to balance equations when there is an odd number of elements? Do we use a mixed number? No, you usually use integers as stoichiometric coefficients. This kind of an issue usually comes up with combustion problems, so I'll use a combustion problem as an example. But, you can ...
by Sid Panda 2A
Tue Oct 13, 2020 9:37 am
Forum: Significant Figures
Topic: SI UNITS
Replies: 12
Views: 79

Re: SI UNITS

Specifically for Dr. Lavelle's class, how many sig figs should we be using? To the right of the deciemal point, how high should we go up? Agree with the person above me. Here is the link (https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14A/EVERYTHING_YOU_WANTED_TO_KNOW_ABOUT_SF.pdf) t...
by Sid Panda 2A
Sat Oct 10, 2020 11:44 am
Forum: Molarity, Solutions, Dilutions
Topic: Textbook Question G.15
Replies: 2
Views: 35

Re: Textbook Question G.15

(b) An experiment requires the use of 60.0 mL of 0.50 M NaOH(aq). The stockroom assistant can only find a reagent bottle of 2.5 M NaOH(aq). How can the 0.50 M NaOH(aq) be prepared? For question B I got to the point where I solved v2 using m1v1=m2v2, which was 12mL. From there how to I get to 60mL? ...
by Sid Panda 2A
Mon Oct 05, 2020 6:03 pm
Forum: Molarity, Solutions, Dilutions
Topic: Question About HW G17 Pt. b
Replies: 2
Views: 46

Re: Question About HW G17 Pt. b

I tried doing the problem and I think that we should need 12.5g of CuSO4 ⋅ 5H2O to prepare 250 mL of 0.20 M CuSO4. Below are my steps: 1. Figure out how many moles of CuSO4 are needed to prepare 250 mL of 0.20 M CuSO4. 0.250 * 0.20 = 0.05 mol of CuSO4. 2. Determine mass of 0.05 mol of of CuSO4. 0.05...
by Sid Panda 2A
Mon Oct 05, 2020 5:21 pm
Forum: Molarity, Solutions, Dilutions
Topic: Question About HW G17 Pt. b
Replies: 2
Views: 46

Question About HW G17 Pt. b

(a) Determine the mass of anhydrous copper(II) sulfate that must be used to prepare 250 mL of 0.20 M CuSO4 (aq). (b) Determine the mass of CuSO4 ⋅ 5H2O that must be used to prepare 250 mL of 0.20 M CuSO4 (aq). How do we do part b? The solution manual says that there should be 12g of CuSO4 ⋅ 5H2O to ...
by Sid Panda 2A
Mon Oct 05, 2020 4:28 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity Equations
Replies: 3
Views: 39

Re: Molarity Equations

Since we have the equation of MV = MV, will we need to also know/use the other equations derived from M=n/v such as n/v = n/v or n/M = n/M? I'm not sure if we will use all these derivations, but I would suggest remembering M = n/V. All of the derivations come from this equation, including MV (initi...
by Sid Panda 2A
Mon Oct 05, 2020 4:23 pm
Forum: Molarity, Solutions, Dilutions
Topic: Calculating Molarity
Replies: 3
Views: 39

Re: Calculating Molarity

Yes, if you are thinking about the volume of the solute being included with the volume of the liquid in the solution. In the equation, M = \frac{n}{V} , the "V" is the volume of the solution. By definition, a solution is a combination of a solute and a solvent. So, if you are measuring the...
by Sid Panda 2A
Mon Oct 05, 2020 4:16 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Determining Molar Mass
Replies: 19
Views: 205

Re: Determining Molar Mass

When using the atomic weight to calculate molar mass, does it matter if we round the atomic weight. For instance, would there be a difference in my answer if I used 15.999 or 16 for oxygen? I think it depends on the number of sigfigs you need to use. 16 often works when I'm doing the HW problems, u...
by Sid Panda 2A
Mon Oct 05, 2020 4:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4395

Re: Step Up Sessions

Hello! I am an incoming Freshman in the Chem 14A class. I took Honors Chem in 11th grade and AP Chem in 12th grade. Any recommendations on taking a step-up session? I know I'm not as rusty since I took the course recently, but I feel that having my second semester of Chem last year being very rushe...
by Sid Panda 2A
Mon Oct 05, 2020 10:31 am
Forum: Molarity, Solutions, Dilutions
Topic: Diluting a Solution
Replies: 9
Views: 97

Re: Diluting a Solution

TLDR; To figure out how many moles are in your new solution, you need to multiply the molarity with the volume, in Liters, of the new solution ( Molarity * Volume = Moles of soulte ). I think it is assumed that the molarity of a solution is consistent throughout the solution (i.e the solute is not c...

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