Search found 33 matches
- Tue Jun 05, 2018 11:49 pm
- Forum: Hybridization
- Topic: The number before the sp
- Replies: 3
- Views: 484
Re: The number before the sp
Yeah it should signify the orbital its taking place in so for 3sp2 I believe it would be the third row and the sp2 would have 3 attachments.
- Tue Jun 05, 2018 11:35 pm
- Forum: Lewis Acids & Bases
- Topic: Conjugate Acids and Bases
- Replies: 4
- Views: 514
Re: Conjugate Acids and Bases
Why does weak acid have a strong conjugate base and in relation a strong acid has a weak conjugate base?
- Tue Jun 05, 2018 11:27 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 5
- Views: 611
Re: Polydentate
Yeah to add on, a monodentate would be a ligand with a single bond so it would only be capable of either binding to the central atom or an ion
- Thu May 31, 2018 4:29 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR and Polarity
- Replies: 1
- Views: 823
Re: VSEPR and Polarity
You need the VSEPR to figure out the polarity of a molecule. For example, knowing the AXE notation of a molecule can help you determine the polarity so if a molecule doesn't have polar bonds its nonpolar but if it has polar bonds it can be nonpolar only if : a)All bonded atoms are identical b)It is ...
- Thu May 31, 2018 4:06 am
- Forum: Hybridization
- Topic: How to identify pi and sigma bonds
- Replies: 4
- Views: 759
Re: How to identify pi and sigma bonds
If an atom has a single bond this would suggest that there is 1 sigma bond, but now if there was a double bond there would be 1 sigma bond + 1 pi bond, and then if there was a triple bond there would be 1 sigma bond + 2 pi bonds present.
- Thu May 24, 2018 10:24 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polar Vs. Non-Polar
- Replies: 7
- Views: 1376
Re: Polar Vs. Non-Polar
Can someone give an example of a polar covalent bond?
- Thu May 24, 2018 10:15 pm
- Forum: Ionic & Covalent Bonds
- Topic: Formal charge?
- Replies: 12
- Views: 1446
Re: Formal charge?
Yeah there is a very easy way to calculate it, all you have to do is get the valence electrons from that atom and subtract both the lone pairs and the bond pairs.
- Thu May 24, 2018 9:58 pm
- Forum: Lewis Structures
- Topic: Test 3 [ENDORSED]
- Replies: 4
- Views: 775
Re: Test 3 [ENDORSED]
I also found it helpful to redo the worksheets that were given during discussion and definitely the homework problems that were assigned.
- Fri May 18, 2018 2:43 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3674213
Re: Post All Chemistry Jokes Here
What did the three hydrogens say to the nitrogen?
AM-MON-IA
AM-MON-IA
- Fri May 18, 2018 2:36 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 3
- Views: 601
Re: Formal Charge
Also, don't forget to express this when drawing the lewis dot structure by putting your answer in square brackets and depending on whether its an anion or cation putting the correct charge.
- Fri May 18, 2018 2:30 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Midterm Question
- Replies: 13
- Views: 1424
Re: Midterm Question
Wasn't the dilution/ concentration one part of the video module questions?
- Fri May 18, 2018 2:27 am
- Forum: Octet Exceptions
- Topic: Radicals/Octet Rule
- Replies: 2
- Views: 532
Re: Radicals/Octet Rule
No, not any element can break the octet rule as professor Lavelle discussed in lecture it's only the elements of either boron or smaller that can have an incomplete octet the key is to counting your valence electrons up and making the other elements "happy". Now there are also expanded oct...
- Fri May 18, 2018 2:12 am
- Forum: Lewis Structures
- Topic: Test #3
- Replies: 11
- Views: 1372
Re: Test #3
Don't worry I'm pretty sure professor Lavelle will go over what is essential for us to know.
- Fri May 11, 2018 1:30 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Midterm Question
- Replies: 13
- Views: 1424
Re: Midterm Question
So to clarify, we didn't need include ms which is just the basic -1/2and +1/2?
- Fri May 11, 2018 1:23 am
- Forum: Octet Exceptions
- Topic: Octet exceptions and Formal charges.
- Replies: 6
- Views: 969
Re: Octet exceptions and Formal charges.
Oh and also for the formal charge calculation is there an easier way to calculate the charge?
- Fri May 11, 2018 1:19 am
- Forum: Octet Exceptions
- Topic: Octet exceptions and Formal charges.
- Replies: 6
- Views: 969
Re: Octet exceptions and Formal charges.
When looking at octet exceptions there are two cases where the octet can be incomplete or expanded but I don't understand the characteristics of each one?
- Thu May 10, 2018 10:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Drawing Lewis Structures
- Replies: 5
- Views: 722
Re: Drawing Lewis Structures
When we draw Lewis structures and we have to use a double bond like in CH20 does the order or side where the double bond is drawn matter?
- Fri May 04, 2018 1:57 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Key for Test #1
- Replies: 4
- Views: 595
Re: Key for Test #1
Does this also apply to test #2?
- Fri May 04, 2018 1:54 am
- Forum: Trends in The Periodic Table
- Topic: Periodic Table Trends on the Midterm
- Replies: 4
- Views: 583
Re: Periodic Table Trends on the Midterm
As everyone else replied, I'm pretty sure understanding the overall concept will help on most probably the final but the midterm is only based on everything up to chapter 2.
- Fri May 04, 2018 1:46 am
- Forum: Trends in The Periodic Table
- Topic: Ionization Energy
- Replies: 4
- Views: 577
Re: Ionization Energy
What's the difference between Ionization energies and electron affinities?
- Thu Apr 26, 2018 10:56 pm
- Forum: Properties of Light
- Topic: Rydberg Formula for Atomic Hydrogen [ENDORSED]
- Replies: 4
- Views: 958
Re: Rydberg Formula for Atomic Hydrogen [ENDORSED]
There are actually many forms of Rydberg formula given but the one that I use is DeltaE = -R*((1/nf^2)-(1/ni^2))*Z^2 Where DeltaE= diff in energy between the final and initial energy level(J) R= Rydberg"s compound(2.178X10^-18J) nf= final energy level ni= initial energy level Z=atomic# (# of pr...
- Thu Apr 26, 2018 10:44 pm
- Forum: DeBroglie Equation
- Topic: When to use DeBroglie or Ek equation
- Replies: 7
- Views: 850
Re: When to use DeBroglie or Ek equation
If we have to use the DeBroglie is it certain that the mass will always be given for a problem?
- Thu Apr 26, 2018 10:39 pm
- Forum: DeBroglie Equation
- Topic: DeBroglie
- Replies: 7
- Views: 782
Re: DeBroglie
Can someone give an example of a practice problem that uses the DeBroglie Equation?
- Fri Apr 20, 2018 1:33 am
- Forum: Properties of Light
- Topic: still don't uderrsatnd what a photon is [ENDORSED]
- Replies: 20
- Views: 1452
Re: still don't uderrsatnd what a photon is [ENDORSED]
A photon basically is a small amount of electromagnetic radiation or light which is a source of energy.
- Fri Apr 20, 2018 1:22 am
- Forum: Empirical & Molecular Formulas
- Topic: Test #1 Question
- Replies: 7
- Views: 855
Re: Test #1 Question
Yeah, I found it easy to count the number of atoms there were for the molecular formula and then divide by a common whole number to get the empirical formula of the model.
- Fri Apr 20, 2018 1:10 am
- Forum: Empirical & Molecular Formulas
- Topic: empirical vs molecular
- Replies: 5
- Views: 711
Re: empirical vs molecular
If this helps another example would be the formula for ethylene glycol which has a molecular formula of C2H602 which would give you the empirical formula when simplified by 2 ( a whole number) CH3O.
- Fri Apr 20, 2018 1:03 am
- Forum: Student Social/Study Group
- Topic: Study Group
- Replies: 8
- Views: 1014
Re: Study Group
Count me in as well, I could use all the help I can get! endriedithgonzalez@gmail.com
- Fri Apr 13, 2018 2:20 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Finding the molarity concentration of one type of atom from a molecule
- Replies: 3
- Views: 256
Re: Finding the molarity concentration of one type of atom from a molecule
To add on, if the molar ratio where different you would have to pair the ratio of the atoms in order to cross out similar units to find the concentration of Na ions.
- Fri Apr 13, 2018 2:05 am
- Forum: Limiting Reactant Calculations
- Topic: actual vs. theoretical yield [ENDORSED]
- Replies: 6
- Views: 1583
Re: actual vs. theoretical yield [ENDORSED]
Theoretical yield is the calculated amount of product based on factors for the reaction to occur.
While the actual yield is the measured amount from the actual experiment which is often less than the theoretical yield because of factors that affect the reaction.
While the actual yield is the measured amount from the actual experiment which is often less than the theoretical yield because of factors that affect the reaction.
- Fri Apr 13, 2018 1:56 am
- Forum: Limiting Reactant Calculations
- Topic: Two limiting reactants?
- Replies: 10
- Views: 2498
Re: Two limiting reactants?
I feel like there should always be an excess of one reactant which in return will cause the other reactant to become limited, so no I don't think its possible. A real-life example would be eating a bowl of cereal where you might put more milk than cereal and in the end, the bowl would be left with m...
- Fri Apr 13, 2018 1:45 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Definition of moles [ENDORSED]
- Replies: 5
- Views: 708
Re: Definition of moles [ENDORSED]
You can also think of it for example as having a mole of oxygen means that you have 6.02 x 10^23 atoms of oxygen which weighs 16grams, so how much a mole weighs is dependent on the atom.
- Mon Apr 09, 2018 2:50 am
- Forum: Balancing Chemical Reactions
- Topic: Balancing the Equation
- Replies: 9
- Views: 1227
Re: Balancing the Equation
I use to have the same problem but to add onto one of the comments I feel like simply guessing and checking to see if your reactants and products are balanced is the best method to take. Simply having your work neatly written out with the multiple attempts you have taken would lead you to the correc...
- Mon Apr 09, 2018 2:43 am
- Forum: Balancing Chemical Reactions
- Topic: Another Way to Balance
- Replies: 7
- Views: 1074
Re: Another Way to Balance
When balancing equations I tend to use my intuition than any systematic method but there is a long mathematical method that includes setting up and solving a system of linear equations, so guess and check would be the quickest way to balance the equations.