Search found 52 matches

by Jasmine Fendi 1A
Tue Dec 03, 2019 11:28 pm
Forum: Naming
Topic: Memorization
Replies: 6
Views: 24

Re: Memorization

I think we need to memorize it and also we should memorize the ligands list that Lavelle sent out in an email.
by Jasmine Fendi 1A
Tue Dec 03, 2019 11:25 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: sigma and pi bonds
Replies: 2
Views: 15

Re: sigma and pi bonds

Yes, I think that is all we need to know too. Also make sure that you know how to label each bond and know which hybrid/normal orbitals are used.
by Jasmine Fendi 1A
Tue Dec 03, 2019 8:37 am
Forum: Ionic & Covalent Bonds
Topic: bond lengths
Replies: 4
Views: 50

Re: bond lengths

I also do not think that we need to memorize the exact bond lengths. We should at least know the relative bond lengths between single, double and triple bonds and the 1.5 bonds in resonance structures
by Jasmine Fendi 1A
Tue Dec 03, 2019 8:35 am
Forum: Student Social/Study Group
Topic: Practice Final
Replies: 12
Views: 127

Re: Practice Final

I do not think there is a practice final, but there are a lot of past exam questions that will be helpful. Also, the 7:30 review session will be going over most things that were covered after the midterm so it would be helpful to go to other review sessions to go over the topics that were covered at...
by Jasmine Fendi 1A
Tue Dec 03, 2019 8:33 am
Forum: Bronsted Acids & Bases
Topic: Defining brosted and lewis
Replies: 5
Views: 30

Re: Defining brosted and lewis

Adding to the comments above,
bronsted base: proton acceptor
bronsted acid: proton donor
lewis base: electron pair donor
lewis acid: electron pair acceptor
I would identify them by focusing on what is being transferred or changed in the reaction.
by Jasmine Fendi 1A
Tue Dec 03, 2019 8:27 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Homework 6B.5
Replies: 1
Views: 22

Re: Homework 6B.5

The first step to solving this problem like this in general is finding the moles of hydrogen which is used through stoichiometry. After finding the moles of hydrogen, you can find the concentration of hydrogen, aka H30+, by using the formula molarity=moles/liter. [HNO3]=[H3O+] is just saying that th...
by Jasmine Fendi 1A
Tue Dec 03, 2019 8:16 am
Forum: Conjugate Acids & Bases
Topic: 6A.1
Replies: 6
Views: 44

Re: 6A.1

You add a hydrogen to the formula and add a +1 to the overall charge of the acid
by Jasmine Fendi 1A
Tue Nov 26, 2019 11:57 am
Forum: Coordinate Covalent Bonds
Topic: identification
Replies: 1
Views: 15

Re: identification

One way is to look for the neutral ligands that are bonded to a central metal atom!
by Jasmine Fendi 1A
Tue Nov 26, 2019 11:56 am
Forum: SI Units, Unit Conversions
Topic: midterm/final
Replies: 15
Views: 158

Re: midterm/final

I also think it would be calculations and concepts!
by Jasmine Fendi 1A
Mon Nov 25, 2019 9:44 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: complexes
Replies: 3
Views: 13

Re: complexes

Yes! I think we should memorize the chart that Lavelle sent out in an email a few days ago
by Jasmine Fendi 1A
Mon Nov 25, 2019 9:39 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: OH2 vs H2O
Replies: 4
Views: 24

Re: OH2 vs H2O

I don't think you would get marked down, but just make sure that you make it clear that you know that the O is the one being bonded to the central atom!
by Jasmine Fendi 1A
Mon Nov 25, 2019 9:38 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Transition Metals
Replies: 4
Views: 30

Re: Transition Metals

I think it is only transition metals, but I am not sure as well :0
by Jasmine Fendi 1A
Sun Nov 24, 2019 12:25 am
Forum: General Science Questions
Topic: Sig Figs
Replies: 7
Views: 40

Re: Sig Figs

Always make sure you have the right sig figs to be safe :)
by Jasmine Fendi 1A
Sun Nov 24, 2019 12:24 am
Forum: Naming
Topic: Greek Prefixes
Replies: 2
Views: 17

Re: Greek Prefixes

Adding on to the comment above, you use it so that it is not awkward saying didimethyl and it adds clarity
by Jasmine Fendi 1A
Tue Nov 19, 2019 10:18 am
Forum: Ionic & Covalent Bonds
Topic: bond lengths
Replies: 4
Views: 50

Re: bond lengths

I don't think we need to memorize bond lengths! Maybe just know that the order of increasing bond lengths is triple<double<single bonds
by Jasmine Fendi 1A
Tue Nov 19, 2019 10:15 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Atomic Size & LDF's
Replies: 2
Views: 14

Re: Atomic Size & LDF's

To add on to the previous comment, more electrons result in greater electron repulsion, which leads to greater polarizability and greater london dispersion forces
by Jasmine Fendi 1A
Thu Nov 14, 2019 11:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.3
Replies: 3
Views: 19

Re: 2E.3

To add on to the comment above, the name of the shape of the molecule only depends on the number of atoms attached to the central atoms and the number of lone pairs on the central atom. Single, double and triple bonds are considered the same as "one unit" and lone pairs on outside atoms do...
by Jasmine Fendi 1A
Thu Nov 14, 2019 11:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: "Less than" Degrees (HW)
Replies: 1
Views: 14

Re: "Less than" Degrees (HW)

I think this is because in order for the molecule to be in the most "stable" state, the lone pairs and attached atoms need to be as far apart as possible, and the lone pairs cause the angles to decrease.
by Jasmine Fendi 1A
Tue Nov 12, 2019 10:26 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework for Week 7
Replies: 5
Views: 36

Re: Homework for Week 7

As I mentioned in another post, I think we can still do some homework problems from the chemical bonds unit because as of now we have not really learned anything new and it is still good to review material for the final! However it is good to look ahead to see what we will be covering next
by Jasmine Fendi 1A
Tue Nov 12, 2019 10:23 am
Forum: Ionic & Covalent Bonds
Topic: Homework for week 7
Replies: 5
Views: 31

Re: Homework for week 7

I think so! As of now we haven't really learned anything new and it is still good to review past material for the final
by Jasmine Fendi 1A
Tue Nov 12, 2019 10:20 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Forces
Replies: 3
Views: 17

Re: Forces

I think this is because of electron repulsion!
by Jasmine Fendi 1A
Thu Nov 07, 2019 5:24 pm
Forum: Formal Charge and Oxidation Numbers
Topic: central atom
Replies: 21
Views: 89

Re: central atom

yes! I think that it is better to have the charge on the most electronegative atom, such as oxygen
by Jasmine Fendi 1A
Thu Nov 07, 2019 11:52 am
Forum: Trends in The Periodic Table
Topic: ionic radii
Replies: 4
Views: 29

Re: ionic radii

In addition to the comments above, the atomic radii decreases as you move towards the right of a period. This is because as you move right, the added electrons are added to the same n level but the number of protons in the nucleus increases. The protons have a much greater effect than the added elec...
by Jasmine Fendi 1A
Thu Nov 07, 2019 11:48 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Comparing forces of attraction
Replies: 4
Views: 17

Re: Comparing forces of attraction

Hydrogen bonds are strong intermolecular forces created when a hydrogen atom bonded to an electronegative atom approaches a nearby electronegative atom, and greater electronegativity of the hydrogen bond acceptor will lead to an increase in hydrogen-bond strength. I think it is because the charge of...
by Jasmine Fendi 1A
Thu Nov 07, 2019 11:18 am
Forum: Octet Exceptions
Topic: General principles of octet exception
Replies: 7
Views: 33

Re: General principles of octet exception

I think that everything in row 3+ can have an expanded octet, and elements such as Aluminum does not have to have an octet.
by Jasmine Fendi 1A
Thu Nov 07, 2019 11:15 am
Forum: Lewis Structures
Topic: Lewis acids and bases?
Replies: 7
Views: 32

Re: Lewis acids and bases?

I believe so! I do know that we will be going over more acids and bases towards the end of the quarter
by Jasmine Fendi 1A
Thu Oct 31, 2019 2:57 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge equation
Replies: 9
Views: 38

Re: Formal Charge equation

hello! the equation for formal charge may be confusing, so my TA told us that you do not have to memorize it. I think you can calculate it using the number of valence electrons from the periodic table and the number of shared electrons in the lewis structure
by Jasmine Fendi 1A
Thu Oct 31, 2019 2:54 pm
Forum: Lewis Structures
Topic: lewis structures
Replies: 4
Views: 17

Re: lewis structures

I think that there would be one correct answers since some lewis structure could be drawn based on different orientations. However, there are some structures that are more stable than others due to formal charge so I think that there will be partial credit if you do not draw the most stable structure.
by Jasmine Fendi 1A
Thu Oct 31, 2019 2:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Posts
Replies: 3
Views: 33

Re: Posts

I believe the replies count as posts!
by Jasmine Fendi 1A
Thu Oct 31, 2019 2:50 pm
Forum: Administrative Questions and Class Announcements
Topic: DINO NUGGETS Review Session! Download Problems HERE [ENDORSED]
Replies: 52
Views: 3676

Re: DINO NUGGETS Review Session! Download Problems HERE [ENDORSED]

Do you think that the practice problems on the dino nuggets worksheet are about the same difficulty as the problems that would be on the midterm?
by Jasmine Fendi 1A
Mon Oct 28, 2019 8:37 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm
Replies: 28
Views: 162

Re: Midterm

I was wondering the same question. That is what I think also but I am not sure
by Jasmine Fendi 1A
Thu Oct 24, 2019 10:34 am
Forum: Trends in The Periodic Table
Topic: Location of elements
Replies: 12
Views: 74

Re: Location of elements

I think it would be helpful, but make sure to know where all of the common elements are so they are easier to find on the periodic table!
by Jasmine Fendi 1A
Thu Oct 24, 2019 10:27 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 13
Views: 96

Re: Electron Configurations

Hi, can someone please further explain the exception for the electron configuration for 3d and 4s? especially for the elements Cr and Cu?

Thank you!
by Jasmine Fendi 1A
Thu Oct 24, 2019 10:23 am
Forum: Trends in The Periodic Table
Topic: Summary of Periodic Trends
Replies: 7
Views: 68

Re: Summary of Periodic Trends

Can someone please explain why ionization energy increases as you move from left to right on the periodic table?
by Jasmine Fendi 1A
Thu Oct 24, 2019 10:17 am
Forum: Ionic & Covalent Bonds
Topic: Properties of Metals/Nonmetals/Metalloids
Replies: 3
Views: 21

Re: Properties of Metals/Nonmetals/Metalloids

In addition to the other responds, nonmetals have high ionization energies. They are generally poor conductors of heat and electricity. Solid nonmetals are generally brittle, with little or no metallic luster, and most nonmetals have the ability to gain electrons easily
by Jasmine Fendi 1A
Thu Oct 24, 2019 10:12 am
Forum: Properties of Light
Topic: Midterm
Replies: 4
Views: 39

Re: Midterm

Yes! Dr. Lavelle mentioned it and I believe sometime soon he will let us know when the review sessions are
by Jasmine Fendi 1A
Fri Oct 18, 2019 11:41 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 245

Re: Best Way To Study?

First, I like to go through practice problems and make a list of topics I am confused about. Sometimes I also rewrite my notes from lecture and try to explain it to others since it helps to talk through it out loud.
by Jasmine Fendi 1A
Fri Oct 18, 2019 11:22 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7708
Views: 1037112

Re: Post All Chemistry Jokes Here

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
by Jasmine Fendi 1A
Wed Oct 16, 2019 1:45 pm
Forum: Properties of Light
Topic: Constant for Speed of Light
Replies: 14
Views: 71

Re: Constant for Speed of Light

I would use 2.998*10^8 m*s-1 because it would give you a more exact answer, but maybe ask your TA!
by Jasmine Fendi 1A
Wed Oct 16, 2019 1:42 pm
Forum: Properties of Electrons
Topic: Orbitals and Lobes
Replies: 3
Views: 18

Re: Orbitals and Lobes

I think that an orbital is the probability description of where an electron can be found, and the four basic types of orbitals are designated as s, p, d, and f. To my understanding, lobes are more specific areas within the orbitals in which there is a high probability of finding an electron.
by Jasmine Fendi 1A
Wed Oct 16, 2019 1:36 pm
Forum: General Science Questions
Topic: Salt Water: Mixture or Compound?
Replies: 4
Views: 19

Re: Salt Water: Mixture or Compound?

I think salt water is a mixture because it is made up of different compounds/elements (salt and water).
by Jasmine Fendi 1A
Fri Oct 11, 2019 4:06 pm
Forum: Significant Figures
Topic: for test 1
Replies: 3
Views: 70

Re: for test 1

There might be some points marked off, but I believe there is still partial credit! And as long as you are aware of it for the next test, you should be fine
by Jasmine Fendi 1A
Fri Oct 11, 2019 3:58 pm
Forum: Student Social/Study Group
Topic: Best Sessions
Replies: 12
Views: 58

Re: Best Sessions

In addition to the sessions in covel, I recommend going over the lecture videos and trying to reexplain the lecture to someone else in your own words
by Jasmine Fendi 1A
Fri Oct 11, 2019 3:50 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Reactions
Replies: 20
Views: 145

Re: Balancing Chemical Reactions

I know that some suggested to start balancing the least complex molecule first, but personally I've been starting with whichever element comes first and then going back when needed
by Jasmine Fendi 1A
Fri Oct 11, 2019 3:43 pm
Forum: Properties of Light
Topic: Homework Question 1A.7
Replies: 2
Views: 17

Re: Homework Question 1A.7

I also got that and i think it is a typo because the book does ask for the answer to be in picometers
by Jasmine Fendi 1A
Fri Oct 11, 2019 3:35 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 56
Views: 411

Re: Study Tips

Besides reviewing my notes and going over practice problems, I like to talk through problems and explain the solution to others.
by Jasmine Fendi 1A
Thu Oct 03, 2019 1:13 am
Forum: SI Units, Unit Conversions
Topic: Easy method to memorize prefixes?
Replies: 2
Views: 37

Re: Easy method to memorize prefixes?

Hi! I don't know if this helps but I memorized the intervals and the prefixes separately and eventually put them together over repetition. I memorized the name of the prefixes with an acronym my friends made: Gee, My Kite Dropped Cuz My Underwear Not Present
by Jasmine Fendi 1A
Thu Oct 03, 2019 1:02 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: F.13 homework problem
Replies: 4
Views: 53

Re: F.13 homework problem

I was also not sure about that. I looked up the name of the compound.
by Jasmine Fendi 1A
Thu Oct 03, 2019 12:58 am
Forum: Empirical & Molecular Formulas
Topic: Homework Problem F1
Replies: 2
Views: 39

Re: Homework Problem F1

At the very end, you multiply your anger by 100% to get the mass percentage composition. When you get all of your percentages, make sure to add up all of the percentages to make sure they add up to 100!
by Jasmine Fendi 1A
Thu Oct 03, 2019 12:52 am
Forum: Molarity, Solutions, Dilutions
Topic: M1V1=M2V2 [ENDORSED]
Replies: 3
Views: 41

Re: M1V1=M2V2 [ENDORSED]

Yes! Technically the equation would cancel out and become n1=n2, which is what M1V1=M2V2 originally derived from. Sometimes the problem would only give you molarity and volume so you wouldn't use moles.
by Jasmine Fendi 1A
Thu Oct 03, 2019 12:13 am
Forum: Significant Figures
Topic: General Rules to Help with Sig Figs
Replies: 18
Views: 163

Re: General Rules to Help with Sig Figs

Thank you! This was very helpful. When I am doing a problem, I would keep as many digits as possible and round off at the end. At the end of a problem, how do you know how many sig figs to use? In high school I used how every many there were in the given values in the problem.

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