Search found 122 matches
- Thu Oct 17, 2019 8:05 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: quantum number topic
- Replies: 4
- Views: 251
Re: quantum number topic
n is the principal quantum number that shows the number of shells and indicates the size and energy. l is the angular momentum quantum number that indicates the shape. ml shows the orbitals. ml is not the same number as l because l is the subshells that consist of 0 (s orbital),1 (p orbital),2 (d or...
- Thu Oct 17, 2019 1:18 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D.25
- Replies: 2
- Views: 89
Re: 1D.25
A subshell notation is basically whether it will be s, p, d, etc. So if n=2 and l=1 then the subshell will be 2p because l=0 is "s," l=1 is "p", l=2 would have been "d", etc.
- Thu Oct 17, 2019 12:41 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Quantum Numbers
- Replies: 7
- Views: 225
Re: Quantum Numbers
I am still confused about how to calculate the magnetic quantum number (ml) based on the principal quantum number (n) and angular momentum number( l ). Could someone please explain to me the process of finding it? Like I know that (l) is dependent on (n) but the (ml) still confuses me. m l is the m...
- Wed Oct 16, 2019 2:35 pm
- Forum: Properties of Light
- Topic: Midterm- Electromagnetic spectrum
- Replies: 3
- Views: 163
Re: Midterm- Electromagnetic spectrum
I think it would be important if you at least get a general idea of where each electromagnetic radiation is like gamma rays being in the left side (before visible light) with the highest Energy and radios being in the right side (after the visible light spectrum which is usually in the middle) where...
- Wed Oct 16, 2019 2:14 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Quantum Numbers
- Replies: 7
- Views: 225
Re: Quantum Numbers
I am still confused about how to calculate the magnetic quantum number (ml) based on the principal quantum number (n) and angular momentum number( l ). Could someone please explain to me the process of finding it? Like I know that (l) is dependent on (n) but the (ml) still confuses me. For example, ...
- Wed Oct 16, 2019 1:44 pm
- Forum: Properties of Light
- Topic: Constant for Speed of Light
- Replies: 14
- Views: 556
Constant for Speed of Light
I am wondering what constant would Lavelle prefer/require us to use throughout our homework problems and next exam when it comes to speed of light because the Solution Manual used 2.998*10^8 m*s^-1 but in my PLF we used 3.0*10^8 m*s^-1. I am aware that each one can you give you a different answer so...
- Wed Oct 09, 2019 2:35 pm
- Forum: Empirical & Molecular Formulas
- Topic: Molecular formula
- Replies: 6
- Views: 2844
Re: Molecular formula
Everyone above is correct but I personally like to see actual examples to better understand a concept so I provided you with a step-by-step example I solved from a cool website that provides practice problems like this https://chem.libretexts.org : Determine the empirical and molecular formula for c...
- Wed Oct 09, 2019 2:22 pm
- Forum: Significant Figures
- Topic: Are we allowed to round when showing work?
- Replies: 7
- Views: 472
Re: Are we allowed to round when showing work?
I would personally say to write out your calculations exactly as you input them on your calculator ( unrounded) because if you do by any chance make a mistake with your sig figs in your final answer then your TA will look at your work (for partial credit) and by providing the unrounded values they w...
- Wed Oct 09, 2019 1:58 pm
- Forum: SI Units, Unit Conversions
- Topic: Homework Grading Clarification [ENDORSED]
- Replies: 8
- Views: 871
Re: Homework Grading Clarification [ENDORSED]
So say we complete every part of the question correctly, but right at the end we mess up on our sig figs, we'll still get no credit for any of our previous work? In my discussion, one of the students asked this to our TA and he said that you will be able to get partial credit if you show your work ...
- Wed Oct 09, 2019 1:38 pm
- Forum: Significant Figures
- Topic: Question About Significant Figures and Rounding
- Replies: 22
- Views: 3168
Re: Question About Significant Figures and Rounding
When we add molar masses of elements to get the total matter weight of compounds, should I use the entire number that the periodic table gives? or should I round certain numbers? I noticed that the periodic table Lavelle has shown us compared to one I had back home has different amount of numbers a...
- Wed Oct 09, 2019 1:10 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Week 2 Homework Problems [ENDORSED]
- Replies: 67
- Views: 7177
Re: Week 2 Homework Problems [ENDORSED]
Are the TA's grading our homework based on completion or correctness?
- Wed Oct 02, 2019 7:29 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: How to access e textbook
- Replies: 4
- Views: 289
Re: How to access e textbook
The sapling came in my bundle but to be completely honest I am not sure what is it used for like is it to just access an online version of the textbook or is there other important information we can only access through the sapling code/booklet that came with the bundle?
- Wed Oct 02, 2019 7:16 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Solubility Rules Memorization ?
- Replies: 3
- Views: 264
Re: Solubility Rules Memorization ?
To build off of that question, if the question shows the solubility like (l) or (s) or (aq) would it matter if throughout our problem solving and the final answer it does not have the solubility or do we have to include it throughout and the final answer?
- Wed Oct 02, 2019 7:06 pm
- Forum: Empirical & Molecular Formulas
- Topic: Homework question M.17
- Replies: 2
- Views: 238
Homework question M.17
In my discussion, we were working on problem M.17 but did not get to finish it and I got stuck near the end of solving the problem so I went to the Solution Manual and for "finding the molar mass of XA" it set it up as (231-1.0) + (125-17) to equal 338 g/mol. However, I do not understand w...
- Tue Oct 01, 2019 11:43 pm
- Forum: Significant Figures
- Topic: Question About Significant Figures and Rounding
- Replies: 22
- Views: 3168
Re: Question About Significant Figures and Rounding
As a visual learner, I found the following images attached below that have helped me better understand the rules with sig figs. Hopefully, it can help some of you too. In sum, nonzero digits always count as a sig fig. For zero digits, if its inbetween nonzero digits it counts and if the zeros are af...
- Tue Oct 01, 2019 10:59 pm
- Forum: Empirical & Molecular Formulas
- Topic: Mass % Composition
- Replies: 7
- Views: 596
Re: Mass % Composition
I am still a bit confused about when to divide the mass percentage by 100g and when to just take the percentage and make it into grams. For example, in the homework problem E.11, we took the percentages like 7.42% from one of the isotopes and divided by 100 to get 0.0742. However, when looking at th...
- Thu Oct 11, 2018 5:52 pm
- Forum: General Science Questions
- Topic: Periodic Table
- Replies: 16
- Views: 1591
Re: Periodic Table
It is best and safer to just keep the number exactly as seen on the periodic table so that you do not round too much. Usually you do the rounding until the very end of your calculations.
- Thu Oct 11, 2018 4:57 pm
- Forum: Significant Figures
- Topic: Rounding Using Significant Figures
- Replies: 10
- Views: 1430
Re: Rounding Using Significant Figures
What is the rule with the zeros when counting sig figs because I know that there are times you do not count the zero as a sig fig but sometimes you do. When do you know to count the zero as a sig fig?
- Thu Oct 11, 2018 4:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Number of questions on test one [ENDORSED]
- Replies: 39
- Views: 21464
Re: Number of questions on test one [ENDORSED]
If we do not understand what a question on the test asks is it allowed to ask for clarity from our TA's?
- Wed Oct 03, 2018 8:36 pm
- Forum: SI Units, Unit Conversions
- Topic: Homework Grading Clarification [ENDORSED]
- Replies: 8
- Views: 871
Re: Homework Grading Clarification [ENDORSED]
Is it possible to get partial credit for homework problems?
- Wed Oct 03, 2018 8:31 pm
- Forum: SI Units, Unit Conversions
- Topic: Textbook Homework Assignment
- Replies: 11
- Views: 1343
Re: Textbook Homework Assignment
Is it possible to get credit if you do all the problems rather than just 7 problems?
- Wed Oct 03, 2018 7:45 pm
- Forum: General Science Questions
- Topic: Sig Figs
- Replies: 9
- Views: 1707
Re: Sig Figs
How can you check if your sig. figs. are too precise or not rounded off enough?