I just feel relieved :)
I feel proud of myself for finishing my first every chemistry course (14a and 14b) during such times
Search found 108 matches
- Sun Mar 14, 2021 10:48 pm
- Forum: General Science Questions
- Topic: Final thoughts
- Replies: 28
- Views: 4078
- Sat Mar 13, 2021 9:15 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: What was your favorite chem topic?
- Replies: 137
- Views: 7836
Re: What was your favorite chem topic?
Cindy Adiwidjaja 1B wrote:I liked chemical equilibrium because it was so easy. However, conceptually, I found galvanic cells to be really cool. Did I know how to solve them? No. But did I think they were interesting? Yes.
Haha definitely relatable
- Sat Mar 13, 2021 9:13 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam Time
- Replies: 47
- Views: 1953
Re: Final Exam Time
be careful with daylight saving time though!!
- Sat Mar 13, 2021 9:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Textbook Question 6L.3d
- Replies: 2
- Views: 174
Re: Textbook Question 6L.3d
thanks!
- Sat Mar 13, 2021 1:57 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: when to add Pt (s)
- Replies: 23
- Views: 882
when to add Pt (s)
What are the specific conditions to add Pt(s) at the end of a cell diagram?
- Fri Mar 12, 2021 6:03 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Textbook Question 6L.7
- Replies: 2
- Views: 139
Textbook Question 6L.7
why is the KOH added in the cell diagram?
- Wed Mar 10, 2021 11:11 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Textbook Question 6L.3d
- Replies: 2
- Views: 174
Textbook Question 6L.3d
How do I solve this question? When I compare my answers with the solutions manual it seems like I'm not reading the phase boundaries ( | , ||, etc. ) correctly and secondly since its just H+ and OH- and water, the procedure seems different compared to the other galvanic cell questions.
- Sun Mar 07, 2021 12:19 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: What was your favorite chem topic?
- Replies: 137
- Views: 7836
Re: What was your favorite chem topic?
I liked Acids and Bases
- Sun Mar 07, 2021 12:18 am
- Forum: General Science Questions
- Topic: Midterm 2 Reactions
- Replies: 79
- Views: 4772
Re: Midterm 2 Reactions
Did worse on MT2 than MT1 terrified for the final
- Sun Mar 07, 2021 12:17 am
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam Time
- Replies: 47
- Views: 1953
Re: Final Exam Time
Pretty sure we follow Dr. Lavelle's website and it says Sunday 3/14 at 0930-1100
- Sun Mar 07, 2021 12:14 am
- Forum: General Science Questions
- Topic: The Final Countdown
- Replies: 14
- Views: 879
Re: The Final Countdown
Definitely feeling a little burned out. Can't wait for the final to be over.
- Sat Mar 06, 2021 3:45 am
- Forum: General Rate Laws
- Topic: Factors Affecting k
- Replies: 83
- Views: 4449
Re: Factors Affecting k
rate changes with temperature change
- Thu Feb 25, 2021 5:13 am
- Forum: Student Social/Study Group
- Topic: Classes for next quarter?
- Replies: 165
- Views: 12165
Re: Classes for next quarter?
I'm taking orgchem (chem 30a), gender studies 10, eng comp 3, and lifesci 7b!
- Thu Feb 25, 2021 5:09 am
- Forum: Student Social/Study Group
- Topic: Chem 14B Final
- Replies: 86
- Views: 4978
Re: Chem 14B Final
For me, I try to do ALL of the textbook questions and read over my notes a couple of times. This prepares me for the calculations and the conceptual questions
- Thu Feb 25, 2021 5:07 am
- Forum: Student Social/Study Group
- Topic: How to Reduce Nervousness before getting results
- Replies: 63
- Views: 4578
Re: How to Reduce Nervousness before getting results
I just forget about it hope for the best. In the meantime, I catch up on some TV shows that I couldn't watch because of my cram sesh or do something fun!
- Thu Feb 25, 2021 5:05 am
- Forum: Student Social/Study Group
- Topic: Book Recommendations
- Replies: 135
- Views: 11601
Re: Book Recommendations
But for a more serious one I liked Never Let Me Go by Kazuo Ishiguro
- Thu Feb 25, 2021 5:04 am
- Forum: Student Social/Study Group
- Topic: Book Recommendations
- Replies: 135
- Views: 11601
Re: Book Recommendations
If you wanna see how bad the book to movie adaptation is for TATBILB you could read the series :D
- Thu Feb 25, 2021 5:03 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: E cell vs Ecell naught
- Replies: 25
- Views: 1509
Re: E cell vs Ecell naught
E cell naught is for under standard conditions
Ecell changes as the current flows
Ecell changes as the current flows
- Sun Feb 21, 2021 6:00 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: confusion on using Cp and Cv
- Replies: 24
- Views: 965
Re: confusion on using Cp and Cv
Cp is for when the pressure is constant and Cv is for when the volume is constant. They're usually given and if the question mentions that the gas is ideal, then the values can be found on the formula sheet
- Sun Feb 21, 2021 5:58 am
- Forum: Student Social/Study Group
- Topic: Post Midterm 2 De-stressing
- Replies: 92
- Views: 5749
Re: Post Midterm 2 De-stressing
George Kaleb Jimenez 1K wrote:I dont know about yall but after that midterm I am going to watch WandaVision and eat to my heart's content <3
How do yall plan on destressing this weekend?? :3
same! I just watched the newest episode and I was shocked.
- Sun Feb 21, 2021 5:56 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Free Energy
- Replies: 49
- Views: 1809
Re: Free Energy
I believe state functions depend on only final and initial states so free enrgy would match that definition. Whereas other functions like work and heat do depend on the process it took to get to the final state.
- Sun Feb 21, 2021 5:54 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: entropy positive value
- Replies: 30
- Views: 1678
Re: entropy positive value
The entropy of the universe is always positive. I think that's what you're talking about
- Sun Feb 21, 2021 5:53 am
- Forum: Student Social/Study Group
- Topic: Points needed to pass?
- Replies: 76
- Views: 6304
Re: Points needed to pass?
200 points is equal to a 50% which is said to be a C- (pass) for this class
- Sun Feb 14, 2021 11:34 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy definition
- Replies: 37
- Views: 2058
Re: Entropy definition
Entropy is the measure of disorder in the world. Depending on the letters next to the "S" it could mean for the system, world etc
- Sun Feb 14, 2021 11:33 am
- Forum: Student Social/Study Group
- Topic: Valentine's Day Long Weekend!
- Replies: 30
- Views: 1650
Re: Valentine's Day Long Weekend!
Although Valentines ended for me already (timezone), happy Valentines everybody!
- Sun Feb 14, 2021 11:31 am
- Forum: Ideal Gases
- Topic: R ideal gas constant
- Replies: 31
- Views: 1871
Re: R ideal gas constant
They are both on the formula sheet and you have to be careful with the different units you're dealing with in your equations. One has J*K^-1*mol^-1 while the other has L*atm*K^-1
- Sun Feb 14, 2021 11:30 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: delta G
- Replies: 9
- Views: 474
Re: delta G
Delta G is the change in free energy of a reaction while delta G ° is the change in free energy of a reaction under standard conditions!
- Sun Feb 14, 2021 11:27 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2764305
Re: Post All Chemistry Jokes Here
all these jokes make me enjoy chemistry a little bit more every week. just wanted to say thank you to everyone
- Sun Feb 07, 2021 7:03 am
- Forum: General Science Questions
- Topic: Careless Mistakes
- Replies: 54
- Views: 3115
Re: Careless Mistakes
I have this problem too. To try and fix this (at least during exams), I use the remaining time I have to redo every question again or even twice to make sure I am not making any careless mistakes. And when doing so, I do the whole problem on a new piece of paper so I don't get influenced by my previ...
- Sun Feb 07, 2021 6:58 am
- Forum: Phase Changes & Related Calculations
- Topic: Boiling water
- Replies: 25
- Views: 2657
Re: Boiling water
during the phase change, as the particles start increasing in energy they move or vibrate and as they move into their vapor state, they need to move more freely and not be as close to each other. These bonds do not have the highest bond energies but also are not too weak either. Due to the breaking ...
- Sun Feb 07, 2021 6:54 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Cv and Cp
- Replies: 3
- Views: 118
Cv and Cp
I saw that Cp=Cv+R while trying to solve a sapling problem. How is this so?
- Sun Feb 07, 2021 6:51 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: How to know the sign for work
- Replies: 26
- Views: 856
Re: How to know the sign for work
It depends on where the work is being applied. For example, if work is done on a system, there will be a negative sign, while on the other hand, if work is done by the system it is positive
- Thu Feb 04, 2021 2:42 am
- Forum: Student Social/Study Group
- Topic: Students Who Have a Job
- Replies: 103
- Views: 8744
Re: Students Who Have a Job
Hey I work less hours than you do but I do admit it is still hard to manage the two and maintaining grades. I feel like I lose time for self-care and stress myself out a bit too much. I try to manage it by just taking a break and dropping everything when I need to. I'll spend a whole day watching Ne...
- Sat Jan 30, 2021 9:51 am
- Forum: Phase Changes & Related Calculations
- Topic: when to assume x is insignificant
- Replies: 86
- Views: 6272
Re: when to assume x is insignificant
I use 10^-4
- Sat Jan 30, 2021 9:45 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: percent protonation/deprotonation
- Replies: 15
- Views: 742
percent protonation/deprotonation
What are the differences between the two???
percent protonation/deprotonation
percent protonation/deprotonation
- Sat Jan 30, 2021 9:44 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding a gas
- Replies: 26
- Views: 949
Re: Adding a gas
Noble gasses have no effect on the equilibrium of the reaction!!!
- Sat Jan 30, 2021 4:53 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Textbook Question 6B.9 [ENDORSED]
- Replies: 1
- Views: 120
Textbook Question 6B.9 [ENDORSED]
For this chart, for row one, when I try to calculate the pOH from pH, the pOH value becomes negative. Am I supposed to calculate it another way?
- Sat Jan 30, 2021 4:49 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: q=mCdeltaT
- Replies: 3
- Views: 261
q=mCdeltaT
Hi guys,
What lecture did we learn how to calculate these types of questions? I found them pretty early on in sapling so
q=mCdeltaT
What lecture did we learn how to calculate these types of questions? I found them pretty early on in sapling so
q=mCdeltaT
- Sat Jan 23, 2021 1:36 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Salts (Acid/Base)
- Replies: 3
- Views: 281
Salts (Acid/Base)
How do I know if a salt is acidic or basic?
- Sat Jan 23, 2021 1:29 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Percentages
- Replies: 2
- Views: 159
Percentages
Just for clarification:
Percentage ionization is used for acids (with Ka) and percentage protonation is used for bases (Kb)?
Percentage ionization is used for acids (with Ka) and percentage protonation is used for bases (Kb)?
- Sat Jan 23, 2021 1:23 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: [B]formal
- Replies: 5
- Views: 320
[B]formal
On one of week 2's sapling questions, it said to calculate the value of percentage protonated, and when it gave me more hints on how to solve the question it said to use the value of Bformal. What is Bformal??
- Sat Jan 23, 2021 1:16 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Tables
- Replies: 36
- Views: 1518
ICE Tables
When filling the "C" row for ICE tables, the values of the X's etc are only determined by the stoichiometric coefficients? or does it have to do with the molarity?
- Sat Jan 23, 2021 1:03 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Studying for Midterm #1
- Replies: 63
- Views: 2346
Re: Studying for Midterm #1
I always complete all of the assigned textbook questions and go over the solutions manual to figure out what i got wrong or take notes on the correct way to solve the question!
- Sat Jan 16, 2021 6:58 am
- Forum: Ideal Gases
- Topic: Non-Ideal gases?
- Replies: 26
- Views: 855
Re: Non-Ideal gases?
Massimo_Capozza_1G wrote:So all we have to know this quarter is Ideal gases and their laws?
according to the syllabus for this unit yes.
- Sat Jan 16, 2021 6:57 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: H2O as a Gas
- Replies: 69
- Views: 6055
Re: H2O as a Gas
only included when water is in its gas state!
- Sat Jan 16, 2021 6:55 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 2320
Re: q vs k
they're both the same calculation method but the letter q usually means the solution isn't at equilibrium. but eventually q should reach k after a certain period of time
- Sat Jan 16, 2021 6:45 am
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 4274
Re: Kc vs Kp
Kp is used when partial pressures are given and Kc is used when concentrations are given but they both are equilibrium constants!
- Sat Jan 16, 2021 6:35 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Textbook Question 5I.11
- Replies: 4
- Views: 211
Textbook Question 5I.11
Why does the solutions manual not multiply the mol values by 2 when the vessel is said to be half of a liter? shouldn't they multiply the mol amounts by 2 to get them at a mol per liter concentration? Q: A reaction vessel of volume 0.500 L at 700. K contains 1.20 mmol SO2(g), 0.50 mmol O2(g), and 0....
- Sat Jan 09, 2021 9:41 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: pressure and concentration
- Replies: 3
- Views: 200
pressure and concentration
Why is it that a change in pressure causes an increase in concentration?
- Sat Jan 09, 2021 9:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc and Kp
- Replies: 3
- Views: 190
Kc and Kp
How do I convert from Kc to Kp?
- Sat Jan 09, 2021 9:07 pm
- Forum: Student Social/Study Group
- Topic: New Year Resolutions?
- Replies: 54
- Views: 2477
Re: New Year Resolutions?
to be more productive :)
- Fri Jan 08, 2021 7:23 am
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 74
- Views: 4133
Re: PV=nRT
P=pressure
V=volume of gas
n= number of moles
R= universal gas constant
T= temperature
V=volume of gas
n= number of moles
R= universal gas constant
T= temperature
- Fri Jan 08, 2021 7:21 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Water
- Replies: 28
- Views: 889
Water
Hey guys, I was just wondering when do we include H2O in the ice table???
- Wed Dec 16, 2020 5:07 am
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 329281
Re: Final Jitters
I take a long bath and drink some warm tea :)))
- Sun Dec 13, 2020 9:06 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Textbook Question 6B.3
- Replies: 2
- Views: 115
Textbook Question 6B.3
How do I solve this?
- Sun Dec 13, 2020 8:12 am
- Forum: Amphoteric Compounds
- Topic: How to figure amphoteric compounds
- Replies: 4
- Views: 329
How to figure amphoteric compounds
Do I have to draw the lewis structure to know if a compound is amphoteric or not?
"ferrate"
Is it just supposed to be known that Fe or Iron is spelled out as ferrate in coordination compounds or is there a condition for it??
- Sat Dec 12, 2020 9:00 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Week 10 Sapling Q10
- Replies: 5
- Views: 332
Week 10 Sapling Q10
From what I tried figuring out, I got this as my answer but its saying I'm incorrect. I thought I got all the strong acids and strong bases but if not, can someone explain whats wrong?
- Sat Dec 12, 2020 8:30 pm
- Forum: Naming
- Topic: Textbook Question 9C.1
- Replies: 5
- Views: 410
Textbook Question 9C.1
for question c, how do I name [CO(CN)5(OH2)]2-
- Sun Dec 06, 2020 10:53 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Textbook Question 2E.13 (I3-)
- Replies: 2
- Views: 120
Textbook Question 2E.13 (I3-)
Why is I3- linear?
- Sun Dec 06, 2020 8:42 pm
- Forum: Hybridization
- Topic: Pi bonds Hybridization
- Replies: 2
- Views: 73
Pi bonds Hybridization
What is the hybridization of a pi bond?
- Sun Dec 06, 2020 8:37 pm
- Forum: Sigma & Pi Bonds
- Topic: Pi bonds
- Replies: 7
- Views: 364
Pi bonds
I know Pi bonds appear when there's a double or triple bond but is there a specific way to label which is which? or do we just need to know that pi bonds appear in certain conditions?
- Sun Dec 06, 2020 8:30 pm
- Forum: Naming
- Topic: Number after Metal
- Replies: 9
- Views: 445
Number after Metal
How do I determine the number that goes after the metal of a compound? Eg. cobalt(II)
- Sun Dec 06, 2020 8:28 pm
- Forum: Naming
- Topic: "(en)" Sapling
- Replies: 19
- Views: 825
"(en)" Sapling
Could someone explain what the (en) means in Cd(en)Br2] ? Found it on Sapling.
- Thu Dec 03, 2020 9:29 pm
- Forum: Naming
- Topic: Sapling 9 #1
- Replies: 7
- Views: 274
Sapling 9 #1
[Co(NH3)5Cl]Cl2 To name this compound, I took the ligand ammonia and there are 5 of them so I named this part as pentaammine, then saw that there are 3 chlorines so trichloro, and lastly the metal is cobalt, so I thought the systematic name would be Pentaamminetrichlorocobalt(III). But this seems to...
- Sun Nov 29, 2020 9:15 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Nonpolar bonds
- Replies: 7
- Views: 180
Nonpolar bonds
Hi,
On sapling I had a question about bond and molecule polarity but from this I was wondering, what would an example of a nonpolar bond be?
On sapling I had a question about bond and molecule polarity but from this I was wondering, what would an example of a nonpolar bond be?
- Sun Nov 29, 2020 9:08 pm
- Forum: Hybridization
- Topic: Determining Hybridization
- Replies: 3
- Views: 195
Determining Hybridization
Hi everyone,
# of regions of electron density=hybridization?
# of regions of electron density=hybridization?
- Sun Nov 29, 2020 8:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar
- Replies: 10
- Views: 527
Polar
What are factors that contribute to whether a molecule's polar or not? is it just the lone pairs?
- Sun Nov 29, 2020 8:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 238
Bond Angles
Are there any other factors used to determine bond angles other than geometrical shape and lone pairs? I'm having a hard time gettinh the sapling questions right.
- Sun Nov 29, 2020 8:59 am
- Forum: Student Social/Study Group
- Topic: How to study for class
- Replies: 30
- Views: 1127
How to study for class
Hi everyone,
I was wondering if anyone relies on the textbook more to learn content rather than the lectures. Since the lectures are recorded, it's sometimes really hard for me to get them going especially as an international student with time difference. If so, any tips?
I was wondering if anyone relies on the textbook more to learn content rather than the lectures. Since the lectures are recorded, it's sometimes really hard for me to get them going especially as an international student with time difference. If so, any tips?
- Wed Nov 25, 2020 9:32 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sapling Question #12
- Replies: 2
- Views: 92
Sapling Question #12
Hi everyone, I've been trying to figure this question out and with the molar masses and composition I've concluded that it's methanol and I drew the lewis structure as can be seen in the attached image. But sapling says it's incorrect. I was wondering what I am doing wrong. An organic compound that ...
- Mon Nov 23, 2020 11:17 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: isoelectronic
- Replies: 12
- Views: 1003
isoelectronic
Hi everyone,
What does isoelectronic mean?
What does isoelectronic mean?
- Mon Nov 23, 2020 11:17 pm
- Forum: Ionic & Covalent Bonds
- Topic: Textbook Question 1A.13
- Replies: 4
- Views: 322
Textbook Question 1A.13
For part c, how do I know which atoms bond with others? Do the parentheses help? Draw the complete Lewis structure for each of the following compounds: (a) formaldehyde, HCHO, which as its aqueous solution, “formalin,” is used to preserve biological specimens; (b) methanol, CH3OH, the toxic compound...
- Mon Nov 23, 2020 11:05 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Silver Electron Configuration
- Replies: 9
- Views: 2635
Silver Electron Configuration
Hi everyone,
quick question:
Why is silver's electron configuration [Kr] 5s1, 4d10? By the usual order it would be [Kr] 5s2, 4d9
quick question:
Why is silver's electron configuration [Kr] 5s1, 4d10? By the usual order it would be [Kr] 5s2, 4d9
- Mon Nov 23, 2020 10:58 pm
- Forum: Trends in The Periodic Table
- Topic: Textbook Question Focus 1.13
- Replies: 2
- Views: 137
Textbook Question Focus 1.13
1.13 Ionization energies usually increase on going from left to right across the periodic table. The ionization energy for oxygen, however, is lower than that of either nitrogen or fluorine. Explain this anomaly. I've read explanations online but I don't really understand what they mean. Can someone...
- Mon Nov 23, 2020 10:56 pm
- Forum: Trends in The Periodic Table
- Topic: Textbook Question 1F.3
- Replies: 4
- Views: 476
Textbook Question 1F.3
1F.3 Place the following ions in order of increasing ionic radius: S2-, Cl-, P3-.
How would I do this?
How would I do this?
- Sat Nov 14, 2020 7:52 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Clarification
- Replies: 8
- Views: 377
Clarification
Adding up all the formal charges on each atom in a lewis structure equals to the overall charge? the one that's on the [ ]*
(the asterisk)
(the asterisk)
- Sat Nov 14, 2020 7:20 am
- Forum: Electronegativity
- Topic: General Idea of Electronegativity [ENDORSED]
- Replies: 3
- Views: 257
General Idea of Electronegativity [ENDORSED]
Hi everyone. I heard from my TA that we won't be receiving periodic tables with values of electronegativity for the midterm. From the fact that whether a bond is ionic or covalent comes from the electronegativity difference, what exactly should I be able to understand or do for the midterm in terms ...
- Sat Nov 14, 2020 7:15 am
- Forum: Ionic & Covalent Bonds
- Topic: Midterm 2 DNA base pairs [ENDORSED]
- Replies: 1
- Views: 492
Midterm 2 DNA base pairs [ENDORSED]
Hi everyone.
Has it been confirmed whether we need to remember DNA base pairs for the midterm? It was brought up as an example in some lectures so I was wondering.
Has it been confirmed whether we need to remember DNA base pairs for the midterm? It was brought up as an example in some lectures so I was wondering.
- Sat Nov 14, 2020 6:58 am
- Forum: Ionic & Covalent Bonds
- Topic: Midterm 2 Content
- Replies: 1
- Views: 57
Midterm 2 Content
Hi everyone!
Is Friday's lecture included in the second midterm?
Is Friday's lecture included in the second midterm?
- Wed Nov 11, 2020 9:31 pm
- Forum: Resonance Structures
- Topic: Sapling Q4
- Replies: 1
- Views: 104
Sapling Q4
I'm trying to figure out the resonance structures for a carbamate ion. Can someone tell me what I am doing wrong??
- Sun Nov 08, 2020 9:54 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Pz Py Pz
- Replies: 5
- Views: 283
Pz Py Pz
What exactly do Px, Py, and Pz represent? I wrote them down from a lecture for the magnetic quantum number but I don't really know what they mean
- Sun Nov 08, 2020 9:43 pm
- Forum: Ionic & Covalent Bonds
- Topic: Sapling Question #3
- Replies: 6
- Views: 365
Re: Sapling Question #3
Also, what exactly does it mean when it says "Phosphorus is able to access 3d orbitals for bonding and, therefore, is not constrained by the octet rule."??
- Sun Nov 08, 2020 9:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Sapling Question #3
- Replies: 6
- Views: 365
Sapling Question #3
Hi everyone
How do I find the lewis structure for the phosphate ion?
How do I find the lewis structure for the phosphate ion?
- Sun Nov 08, 2020 9:27 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Affinity
- Replies: 8
- Views: 354
Electron Affinity
Can someone explain what electron affinity is? I'm still having a hard time understanding it...
- Fri Nov 06, 2020 6:14 am
- Forum: Lewis Structures
- Topic: Sapling Question #3
- Replies: 2
- Views: 131
Sapling Question #3
Hi everyone I havent taken chemistry since freshman year in high school and this sapling question asked for the Lewis structures for the nitrite ion and nitrate ion and it didn't give the chemical formula. Do I have to know the chemical formula for ions?? or any kind of compound?? or will they be gi...
- Fri Nov 06, 2020 6:10 am
- Forum: Ionic & Covalent Bonds
- Topic: Drawing Lewis structures (sapling)
- Replies: 3
- Views: 193
Drawing Lewis structures (sapling)
Hi everyone!
When I "draw" the structures on sapling and have to add charges (the plus and negative signs) to the atoms, does it matter which atoms I add them to?
For example
for CO3 2-, does it matter which O I put the negative charges on?
When I "draw" the structures on sapling and have to add charges (the plus and negative signs) to the atoms, does it matter which atoms I add them to?
For example
for CO3 2-, does it matter which O I put the negative charges on?
- Sun Nov 01, 2020 9:06 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Sapling Question (excited-state, ground-state)
- Replies: 4
- Views: 251
Sapling Question (excited-state, ground-state)
Hi everyone,
I'm confused about how to identify the element. How do I do this?
I'm confused about how to identify the element. How do I do this?
- Sun Nov 01, 2020 8:54 pm
- Forum: Trends in The Periodic Table
- Topic: Sapling Question (Radius)
- Replies: 10
- Views: 1781
Sapling Question (Radius)
Hi everyone
How do I order Cs, Cs-, Cs+ in order from largest to smallest radius?
How do I order Cs, Cs-, Cs+ in order from largest to smallest radius?
- Fri Oct 30, 2020 10:43 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Sapling Question on number of electrons
- Replies: 6
- Views: 344
Sapling Question on number of electrons
Hi everyone! So anytime that the quantum numbers are specified up to the ml number, can I assume that the number of electrons in the atom is 2? because according to pauli's exclusion principle, there can be no more than 2 electrons in the same orbital. the question on sapling: How many electrons in ...
- Wed Oct 28, 2020 10:27 pm
- Forum: Photoelectric Effect
- Topic: UA Session Question
- Replies: 2
- Views: 174
UA Session Question
Hi everyone! Could somebody help me with this question?
Q8. You have a metal, Rubidium, which has a work function of 2.3 eV. If the electrons being
ejected from the metal have a wavelength of 1.7 x 10^5 m, what is the wavelength of the incident
light?
Q8. You have a metal, Rubidium, which has a work function of 2.3 eV. If the electrons being
ejected from the metal have a wavelength of 1.7 x 10^5 m, what is the wavelength of the incident
light?
- Wed Oct 28, 2020 9:24 am
- Forum: Molarity, Solutions, Dilutions
- Topic: UA Session Question
- Replies: 2
- Views: 194
UA Session Question
Hi! Could someone teach me how to do part b of this question? Arsenic is a toxic substance that can sometimes be found in groundwater. Arsenic has a molar mass of 74.922 g/mol. a) Calculate the molarity if 1.125 grams of arsenic are added to 235 mL of water. b) What volume (mL) of concentrated arsen...
- Sat Oct 24, 2020 8:43 pm
- Forum: Properties of Light
- Topic: Textbook Question 1A.5
- Replies: 5
- Views: 185
Textbook Question 1A.5
1A.5 Arrange the following types of photons of electromagnetic radiation in order of increasing energy: γ-rays, visible light, ultraviolet radiation, microwaves, x-rays.
Does this question mean we need to remember the whole EM spectrum? Just the order? or wavelengths, frequencies too
Does this question mean we need to remember the whole EM spectrum? Just the order? or wavelengths, frequencies too
- Sat Oct 24, 2020 8:41 pm
- Forum: DeBroglie Equation
- Topic: Textbook Question 1B.15
- Replies: 6
- Views: 279
Textbook Question 1B.15
Hi everyone! Can somebody explain part b for me? The velocity of an electron that is emitted from a metallic surface by a photon is 3.6×10^3km⋅s−1. (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radiation reac...
- Sat Oct 24, 2020 8:25 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Textbook Question 1A.13
- Replies: 2
- Views: 254
Textbook Question 1A.13
Hi everyone! How do I solve this question? 1A.13 Use the Rydberg formula for atomic hydrogen to calculate the wavelength of radiation generated by the transition from n=2 to n=1. (b) What is the name given to the spectroscopic series to which this transition belongs? (c) Use Table 1A.1 to determine ...
- Sat Oct 24, 2020 8:15 pm
- Forum: DeBroglie Equation
- Topic: Textbook Question 1B.21
- Replies: 2
- Views: 180
Textbook Question 1B.21
Hi everyone! Can someone go through this question step by step for me?
A baseball must weigh between 5.00 and 5.25 ounces (1 ounce=28.3 g). What is the wavelength of a 5.15-ounce baseball thrown at 92 mph?
A baseball must weigh between 5.00 and 5.25 ounces (1 ounce=28.3 g). What is the wavelength of a 5.15-ounce baseball thrown at 92 mph?
- Sat Oct 24, 2020 7:56 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Textbook Question 1B.25
- Replies: 4
- Views: 239
Textbook Question 1B.25
Hi everyone! In the solutions manual, I see a constant that looks like the Plancks constant with a bar through it. What does the h bar constant mean??
- Sun Oct 18, 2020 5:53 pm
- Forum: DeBroglie Equation
- Topic: Textbook Question 1B.19
- Replies: 2
- Views: 88
Textbook Question 1B.19
Hi! After I figure out the wavelengths, how do I calculate the percentage of the wavelength of the neutron?? The solutions manual didn't explain this part and I was wondering if I did it correctly. Protons and neutrons have nearly the same mass. How different are their wavelengths? Calculate the wav...
- Sun Oct 18, 2020 5:49 pm
- Forum: DeBroglie Equation
- Topic: Textbook Question 1B.9
- Replies: 1
- Views: 149
Textbook Question 1B.9
Hi! How do I solve this question?
A lamp rated at 32 W (1 W=1 J⋅s−1) emits violet light of wavelength 420 nm. How many photons of violet light can the lamp generate in 2.0 s? How many moles of photons are emitted in that time interval?
A lamp rated at 32 W (1 W=1 J⋅s−1) emits violet light of wavelength 420 nm. How many photons of violet light can the lamp generate in 2.0 s? How many moles of photons are emitted in that time interval?
- Sun Oct 18, 2020 5:40 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Textbook Question 1A.13
- Replies: 2
- Views: 99
Textbook Question 1A.13
Hi! How do I do the first part of the question? Use the Rydberg formula for atomic hydrogen to calculate the wavelength of radiation generated by the transition from n=2 to n=1. (b) What is the name given to the spectroscopic series to which this transition belongs? (c) Use Table 1A.1 to determine t...