CHEMISTRY COMMUNITY

Endri Dis 1J

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.

Endri Dis 1J

Why does weak acid have a strong conjugate base and in relation a strong acid has a weak conjugate base?

Endri Dis 1J

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

Endri Dis 1J

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 ...

Endri Dis 1J

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.

Endri Dis 1J

Can someone give an example of a polar covalent bond?

Endri Dis 1J

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.

Endri Dis 1J

I also found it helpful to redo the worksheets that were given during discussion and definitely the homework problems that were assigned.

Endri Dis 1J

What did the three hydrogens say to the nitrogen?
AM-MON-IA

Endri Dis 1J

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.

Endri Dis 1J

Wasn't the dilution/ concentration one part of the video module questions?

Endri Dis 1J

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...

Endri Dis 1J

Don't worry I'm pretty sure professor Lavelle will go over what is essential for us to know.

Endri Dis 1J

So to clarify, we didn't need include ms which is just the basic -1/2and +1/2?

Endri Dis 1J

Oh and also for the formal charge calculation is there an easier way to calculate the charge?

Endri Dis 1J

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?

Endri Dis 1J

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?

Endri Dis 1J

Does this also apply to test #2?

Endri Dis 1J

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.

Endri Dis 1J

What's the difference between Ionization energies and electron affinities?

Endri Dis 1J

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...

Endri Dis 1J

If we have to use the DeBroglie is it certain that the mass will always be given for a problem?

Endri Dis 1J

Can someone give an example of a practice problem that uses the DeBroglie Equation?

Endri Dis 1J

A photon basically is a small amount of electromagnetic radiation or light which is a source of energy.

Endri Dis 1J

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.

Endri Dis 1J

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.

Endri Dis 1J

Count me in as well, I could use all the help I can get! endriedithgonzalez@gmail.com

Endri Dis 1J

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.

Endri Dis 1J

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.

Endri Dis 1J

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...

Endri Dis 1J

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.

Endri Dis 1J

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...

Endri Dis 1J

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.

CHEMISTRY COMMUNITY

Search found 33 matches

Re: The number before the sp

Re: Conjugate Acids and Bases

Re: Polydentate

Re: VSEPR and Polarity

Re: How to identify pi and sigma bonds

Re: Polar Vs. Non-Polar

Re: Formal charge?

Re: Test 3 [ENDORSED]

Re: Post All Chemistry Jokes Here

Re: Formal Charge

Re: Midterm Question

Re: Radicals/Octet Rule

Re: Test #3

Re: Midterm Question

Re: Octet exceptions and Formal charges.

Re: Octet exceptions and Formal charges.

Re: Drawing Lewis Structures

Re: Key for Test #1

Re: Periodic Table Trends on the Midterm

Re: Ionization Energy

Re: Rydberg Formula for Atomic Hydrogen [ENDORSED]

Re: When to use DeBroglie or Ek equation

Re: DeBroglie

Re: still don't uderrsatnd what a photon is [ENDORSED]

Re: Test #1 Question

Re: empirical vs molecular

Re: Study Group

Re: Finding the molarity concentration of one type of atom from a molecule

Re: actual vs. theoretical yield [ENDORSED]

Re: Two limiting reactants?

Re: Definition of moles [ENDORSED]

Re: Balancing the Equation

Re: Another Way to Balance