Search found 55 matches

by Nathaly Cruz 2D
Wed Dec 16, 2020 6:57 pm
Forum: Lewis Acids & Bases
Topic: Water
Replies: 62
Views: 467

Re: Water

water works as both an acid or a base depending on the conditions of the problem
by Nathaly Cruz 2D
Wed Dec 16, 2020 6:54 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 49
Views: 284

Re: Final Exam

Nancy Yao wrote:I barely finished the exam. I rushed on several questions and I am pretty sure they are wrong. Also, I did wrong on questions that I spent a lot of time on, which is quite disappointing.



Same. I submitted with one second left because I just ran out of time :( Hopefully, we did well enough though
by Nathaly Cruz 2D
Wed Dec 16, 2020 6:51 pm
Forum: General Science Questions
Topic: curve
Replies: 16
Views: 152

Re: curve

I doubt there will be any curve to our grades.
by Nathaly Cruz 2D
Wed Dec 16, 2020 6:49 pm
Forum: Student Social/Study Group
Topic: New Year Resolutions?
Replies: 50
Views: 137

Re: New Year Resolutions?

My new year's resolution is to grow and be like a bottle of water. I'm usually like a soda, everything around me causes a reaction, but water can be shaken and thrown and it is still calm. So it is my new year's resolution to stay calm even when the world around me seems chaotic.
by Nathaly Cruz 2D
Wed Dec 16, 2020 6:48 pm
Forum: General Science Questions
Topic: Passing Grade
Replies: 34
Views: 206

Re: Passing Grade

250 out of 500 points is a passing grade!
by Nathaly Cruz 2D
Wed Dec 16, 2020 6:46 pm
Forum: Hybridization
Topic: Pi Bonds Cannot Rotate
Replies: 23
Views: 149

Re: Pi Bonds Cannot Rotate

When rotating, would the pi bond break because it is no longer parallel? Correct! Pi bonds don't allow atoms to rotate, so if the atom is no longer parallel, there is no pi bond. This is because pi bonds have electron densities on each side of the internuclear axis, preventing the bond to exist if ...
by Nathaly Cruz 2D
Sun Dec 06, 2020 7:20 pm
Forum: Naming
Topic: -ate
Replies: 17
Views: 83

Re: -ate

Astha Patel 3D wrote:-ate is used when the complex ion has a negative charge. Usually, the coordination compound will contain some metal cation in front of the complex ion in the bracket.


Thanks for the explanation. It helped a lot :)
by Nathaly Cruz 2D
Sun Dec 06, 2020 5:53 pm
Forum: Hybridization
Topic: Pi Bonds Cannot Rotate
Replies: 23
Views: 149

Re: Pi Bonds Cannot Rotate

When rotating, would the pi bond break because it is no longer parallel?
by Nathaly Cruz 2D
Sun Dec 06, 2020 5:50 pm
Forum: Student Social/Study Group
Topic: Upcoming Finals
Replies: 7
Views: 90

Re: Upcoming Finals

Thank you for the encouragement! Good luck everyone on their finals and like Aliya said, "they're just grades." Don't forget to take care of yourself too. You can do it! We are almost done with the quarter just hang in there.
by Nathaly Cruz 2D
Sun Dec 06, 2020 5:46 pm
Forum: Amphoteric Compounds
Topic: Sapling HW #2 [ENDORSED]
Replies: 4
Views: 69

Re: Sapling HW #2 [ENDORSED]

A Bronsted acid can donate H+, so there should be a Hydrogen in the formula. This leaves H3PO4, HBrO2, H2PO4^- to be possible answers. A Bronsted base can accept H+, which can be indicated by a negative charge as it allows the substance to accept an H+. Out of the 3 possible answers, H2PO4^- has a ...
by Nathaly Cruz 2D
Sun Dec 06, 2020 5:44 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 35588

Re: Final Jitters

In order to reduce my nerves before a test, I tend to meditate. I've found that it helps me think more clearly and second guess myself less.
by Nathaly Cruz 2D
Sun Nov 29, 2020 9:17 pm
Forum: Student Social/Study Group
Topic: Studying for Final Exam
Replies: 57
Views: 347

Re: Studying for Final Exam

I think UA sessions help a lot!
by Nathaly Cruz 2D
Sun Nov 29, 2020 9:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling HW #17
Replies: 7
Views: 59

Re: Sapling HW #17

Hey! I was struggling too. Someone advised me to connect the three carbons in a triangle. The triangle should have only one double bond. Then attach the hydrogens accordingly.
by Nathaly Cruz 2D
Sun Nov 29, 2020 9:12 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 35588

Re: Final Jitters

I think being well rested and having eaten something before an exam improves your performance. I've noticed that when I am tired or hungry, I perform worse on my exams than when I have slept well and eaten.
by Nathaly Cruz 2D
Sun Nov 29, 2020 9:10 pm
Forum: Sigma & Pi Bonds
Topic: Delocalized pi bond
Replies: 7
Views: 60

Re: Delocalized pi bond

A delocalized pi bond correlates to resonance structures. A pi bond is a regular pi bond because the molecular structure that is drawn only has that one assemblage for it. Delocalization occurs because there are multiple possible resonance structures for that molecule that are affecting the true ov...
by Nathaly Cruz 2D
Sun Nov 29, 2020 9:08 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: 4.75 Part A
Replies: 5
Views: 550

Re: 4.75 Part A

I know this is an old post, but I was struggling and it really helped to look at how others have helped each other in the past. I'm super thankful for chemistry community!
by Nathaly Cruz 2D
Sun Nov 22, 2020 9:45 pm
Forum: Student Social/Study Group
Topic: Finals!
Replies: 43
Views: 323

Re: Finals!

Victoria_Sauceda_1B wrote:The final will be a cumulative if everything learned In class. He is going to use the midterm scores and questions to prepare us for the final.


How will he do this?
by Nathaly Cruz 2D
Sun Nov 22, 2020 9:43 pm
Forum: Student Social/Study Group
Topic: How to relax after midterms
Replies: 54
Views: 255

Re: How to relax after midterms

In order to relax after midterms, I am kind to myself. I take a nice shower and get cozy. Watch a movie with some snacks, maybe go for a walk and then go to sleep. But, everyone has their own needs and way of relaxing. I am currently taking a meditation class that emphasizes that you should take a m...
by Nathaly Cruz 2D
Sun Nov 22, 2020 9:34 pm
Forum: Bond Lengths & Energies
Topic: Melting Point
Replies: 12
Views: 78

Re: Melting Point

The stronger IMF = higher melting point because you require more energy to break the bonds apart.
by Nathaly Cruz 2D
Sun Nov 22, 2020 9:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 21
Views: 100

Re: Bond Angles

How do you calculate/approximate bond angles in a given molecule? Thanks! I believe what you are asking here is for your own individual problem solving, so the best advice I can give is to memorize the bond angles between "parent" shapes as well as memorize that adding lone pairs decrease...
by Nathaly Cruz 2D
Sun Nov 22, 2020 9:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Extra Credit
Replies: 11
Views: 92

Re: Extra Credit

I don't think extra credit would be offered even though it would be nice and help out a lot of students that are struggling because of zoom fatigue.
by Nathaly Cruz 2D
Sun Nov 15, 2020 9:36 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: polar vs nonpolar
Replies: 3
Views: 31

Re: polar vs nonpolar

If a molecule is polar, that means the charge distribution will be unequal. For example, in the molecule HF it would be polar because F is much more electronegative than H and therefore will have a stronger pull on the electrons. Making the F side of the molecule slightly more negative than the H s...
by Nathaly Cruz 2D
Sun Nov 15, 2020 9:33 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation Sapling 9
Replies: 6
Views: 80

Re: Oxidation Sapling 9

I had the same question. When I was doing the problem on sapling, I got it wrong then it told me that each oxygen atom had an oxidation number of -2. Since there are 4 oxygen atoms, the oxidation number was -8. However, all the oxidation numbers added together must equal the formal charge which in t...
by Nathaly Cruz 2D
Sun Nov 15, 2020 9:27 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Best Formal Charge Equations
Replies: 24
Views: 121

Re: Best Formal Charge Equations

Savana Maxfield 1G wrote:I calculate formal charge by: number of valence electrons - number of nonbonding electrons - (1/2) bonding electrons


I was struggling with formal charge and this equation really helped me understand it :)
by Nathaly Cruz 2D
Sun Nov 15, 2020 9:26 pm
Forum: Lewis Structures
Topic: Sapling 9
Replies: 8
Views: 75

Re: Sapling 9

For formal charge the most probable structures are the ones with the least amount of formal charges on the individual atoms (as long as it still adds up to the total charge), and for bond length, it says that experimentally it was found that the bond length was 144 which is close to 140, the bond l...
by Nathaly Cruz 2D
Sun Nov 15, 2020 9:23 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation numbers
Replies: 3
Views: 17

Re: Oxidation numbers

I think as long as you can do the problem on sapling without trouble, you should be fine for the midterm.
by Nathaly Cruz 2D
Sun Nov 15, 2020 9:21 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 176
Views: 823

Re: Favorite TV shows

Dude Criminal Minds is golden (fave character?). That is literally my comfort show, after every midterm or final, I would just binge watch it to get rid of the negative vibes lol. DEFINITELY 10/10 SHOW Spencer! All time favorite :) (who's yours?) it's my comfort show too! You can never go wrong wit...
by Nathaly Cruz 2D
Sun Nov 08, 2020 8:03 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin state
Replies: 25
Views: 170

Re: Spin state

Hi! The spin state (ms) is a fourth quantum number discovered after Schrodinger's wave function (which consists of 3 quantum numbers: n, l, ml). The spin state can either be (+1/2) or (-1/2). +1/2 means the electron is spinning upwards, and -1/2 means it is spinning downwards. And professor Lavelle...
by Nathaly Cruz 2D
Sun Nov 08, 2020 7:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Format
Replies: 7
Views: 41

Re: Midterm 2 Format

Midterm 2 will still be multiple choice :)
by Nathaly Cruz 2D
Sun Nov 08, 2020 7:48 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 178
Views: 106369

Re: Reading the textbook [ENDORSED]

I know it's pretty late to ask this. I completely bombed my first midterm and I was looking for ways to improve my second midterm. I keep seeing that the textbook is really good for extra practice and explanations. Could someone please explain where to find the textbook?
by Nathaly Cruz 2D
Sun Nov 08, 2020 7:40 pm
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 266

Re: Mid-quarter Check in

I’m definitely nottt doing well :) I hate school, and the online format makes it harder. I honestly just want this quarter to be over lol. SAME but at least we are getting through it. I found that it might help to study with others so if you're down to study together just let me know :) (send me a ...
by Nathaly Cruz 2D
Sun Nov 08, 2020 7:25 pm
Forum: Student Social/Study Group
Topic: sapling due date
Replies: 7
Views: 36

Re: sapling due date

Yes. It is due next Sunday (not today :) but Sunday of week 6).
by Nathaly Cruz 2D
Sun Nov 08, 2020 7:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Question Count
Replies: 17
Views: 106

Re: Midterm 2 Question Count

i heard from the TA's that midterm two will have more questions than midterm one.
by Nathaly Cruz 2D
Sat Nov 07, 2020 3:39 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 176
Views: 823

Re: Favorite TV shows

I'd recommend Money Heist, Criminal Minds, The Vampire Diaries, The Originals and Legacies. :) If you know a specific type of show that you like, I can come up with more ideas, those are just some recommendations. Dude Criminal Minds is golden (fave character?). That is literally my comfort show, a...
by Nathaly Cruz 2D
Sun Nov 01, 2020 6:48 pm
Forum: DeBroglie Equation
Topic: Sapling #4
Replies: 2
Views: 45

Re: Sapling #4

Hi, I was able to find the work function easily, but how do you find the maximum number of electrons ejected? The first part was "When a metal was exposed to photons at a frequency of 1.47×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.30×10−19 J." My work function ca...
by Nathaly Cruz 2D
Sun Nov 01, 2020 6:41 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 176
Views: 823

Re: Favorite TV shows

I'd recommend Money Heist, Criminal Minds, The Vampire Diaries, The Originals and Legacies. :) If you know a specific type of show that you like, I can come up with more ideas, those are just some recommendations.
by Nathaly Cruz 2D
Sun Nov 01, 2020 6:35 pm
Forum: Student Social/Study Group
Topic: Sappling week 2-4 #22
Replies: 6
Views: 49

Re: Sappling week 2-4 #22

I followed the steps, but it still says my answer is incorrect. I used the formulas you guys provided in order to get the answer. I converted my answer from J to eV by using the conversion on the constants and equations sheet, "1 eV= 1.602 x 10^-19J", but it still says incorrect.
by Nathaly Cruz 2D
Mon Oct 26, 2020 2:22 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals Material
Replies: 4
Views: 48

Re: Orbitals Material

I believe Dr. Lavelle said that everything covered up to the end of lecture #9 will be covered on the midterm. Lecture #9 included information on orbitals in the context of Schrodinger equation, so I assume it will be on the midterm. So just clarify, the midterm will only cover material until lectu...
by Nathaly Cruz 2D
Sun Oct 25, 2020 8:01 pm
Forum: Student Social/Study Group
Topic: Advice for Midterm Studying?
Replies: 7
Views: 60

Re: Advice for Midterm Studying?

Hey, maybe a group zoom study session before the midterm would help. I'm down to do one if anyone is willing.
by Nathaly Cruz 2D
Sun Oct 25, 2020 8:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Question
Replies: 5
Views: 46

Re: Midterm Question

Hey, no one really knows. So far, everyone is just saying that time will not be a problem :)
by Nathaly Cruz 2D
Sun Oct 25, 2020 7:58 pm
Forum: Administrative Questions and Class Announcements
Topic: midterm 1
Replies: 10
Views: 78

Re: midterm 1

Melanie Krahn 1C wrote:I have heard that the midterm is supposed to be multiple choice with a mixture of both worked and conceptual problems that need to be completed within the fifteen-minute time period. Hope this helps!


Fifteen? I thought we had 50
by Nathaly Cruz 2D
Sun Oct 25, 2020 7:56 pm
Forum: Administrative Questions and Class Announcements
Topic: CCLE website
Replies: 12
Views: 79

Re: CCLE website

CCLE should be up and running now for everyone
by Nathaly Cruz 2D
Sun Oct 25, 2020 7:55 pm
Forum: Student Social/Study Group
Topic: Questions for Midterm 1
Replies: 5
Views: 75

Re: Questions for Midterm 1

Hey. I've heard mixed responses on how many questions will actually be on the midterm. It has been unclear how many questions will be on the midterm. I would expect maybe about 15-20 but I am not really sure since we only have 50 minutes to complete it. My TA said not to worry. Time is usually not a...
by Nathaly Cruz 2D
Sun Oct 18, 2020 8:32 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8483
Views: 1467392

Re: Post All Chemistry Jokes Here

Q: what do you call an acid with an attitude?
A: a-mean-oh acid
by Nathaly Cruz 2D
Sun Oct 18, 2020 8:22 pm
Forum: Significant Figures
Topic: How to use Scientific Notation
Replies: 9
Views: 102

Re: How to use Scientific Notation

Also, when multiplying and dividing numbers in scientific notation, make sure that your answer has the correct number of significant figures. Your answer should have the same number of sig figs as both values. However, if both values have a different number of sig figs, your answer should have the ...
by Nathaly Cruz 2D
Sun Oct 18, 2020 8:17 pm
Forum: SI Units, Unit Conversions
Topic: studying tactics
Replies: 8
Views: 33

Re: studying tactics

Hey. I would recommend going over your lecture notes, doing the textbook problems and maybe hosting your own zoom study sessions to go over/get clarification on the things that are a bit more confusing to you.
by Nathaly Cruz 2D
Sun Oct 18, 2020 8:15 pm
Forum: Student Social/Study Group
Topic: midterm review
Replies: 2
Views: 23

Re: midterm review

Hey I was wondering this too. I think something that would be beneficial for studying might be to host zoom study sessions with other people in the class and also do the recommended homework problems from the textbook.
by Nathaly Cruz 2D
Sun Oct 18, 2020 8:08 pm
Forum: Significant Figures
Topic: sig fig
Replies: 19
Views: 139

Re: sig fig

I would wait until the end to round your numbers. I would also stick to the number of sig figs that were given in the problem, just to be safe.
by Nathaly Cruz 2D
Sun Oct 18, 2020 8:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Respondus
Replies: 4
Views: 35

Re: Respondus

Hey. I think depending on your discussion, you may still go over it before the exam. We have another week before the midterm. :)
by Nathaly Cruz 2D
Mon Oct 12, 2020 12:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Respondus
Replies: 8
Views: 107

Midterms

Does anyone know the exact dates and times of the midterms? I couldn't find it :(
by Nathaly Cruz 2D
Sun Oct 11, 2020 6:27 pm
Forum: Empirical & Molecular Formulas
Topic: Sapling Question #10
Replies: 3
Views: 60

Re: Sapling Question #10

I looked them up on google.
by Nathaly Cruz 2D
Sun Oct 11, 2020 6:26 pm
Forum: Empirical & Molecular Formulas
Topic: Sampling #9
Replies: 7
Views: 66

Re: Sampling #9

Hi. I was really lost too until someone explained it to me. So looking at the problem, the given information is that we have 1.000g of caproic acid. We have 2.275g of CO2 and 0.929g of H2O. Step one would be to find the carbon in CO2. In order to do this, you must take the molar mass of carbon (12.0...
by Nathaly Cruz 2D
Sun Oct 11, 2020 4:12 pm
Forum: Student Social/Study Group
Topic: Discussion 2D GroupMe
Replies: 4
Views: 32

Re: Discussion 2D GroupMe

Hey, I haven't seen a Groupme for discussion 2D yet. Would you like for me to start one?
by Nathaly Cruz 2D
Sun Oct 11, 2020 4:10 pm
Forum: Empirical & Molecular Formulas
Topic: Sapling Homework 1 Q#9
Replies: 21
Views: 248

Re: Sapling Homework 1 Q#9

Aimee Alvarado 2K wrote:So this is how I solved the problem:


Thank you so much for listing it out step-by-step. I was really struggling and the detailed instructions helped.
by Nathaly Cruz 2D
Fri Oct 09, 2020 7:55 pm
Forum: Properties of Light
Topic: Why do salts with different cations burn different colors?
Replies: 2
Views: 45

Re: Why do salts with different cations burn different colors?

Although I am not well-versed in salt cations either, I have done some research. According to what I have found, when an atom is heated, some of the electrons become "excited". Once the electron drops from one energy level to a lower one, it emits a "quantum of energy." The combi...

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