Search found 33 matches

by Endri Dis 1J
Tue Jun 05, 2018 11:49 pm
Forum: Hybridization
Topic: The number before the sp
Replies: 3
Views: 150

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.
by Endri Dis 1J
Tue Jun 05, 2018 11:35 pm
Forum: Lewis Acids & Bases
Topic: Conjugate Acids and Bases
Replies: 4
Views: 148

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?
by Endri Dis 1J
Tue Jun 05, 2018 11:27 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 5
Views: 170

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
by Endri Dis 1J
Thu May 31, 2018 4:29 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR and Polarity
Replies: 1
Views: 131

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 ...
by Endri Dis 1J
Thu May 31, 2018 4:06 am
Forum: Hybridization
Topic: How to identify pi and sigma bonds
Replies: 4
Views: 157

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.
by Endri Dis 1J
Thu May 24, 2018 10:24 pm
Forum: Ionic & Covalent Bonds
Topic: Polar Vs. Non-Polar
Replies: 7
Views: 254

Re: Polar Vs. Non-Polar

Can someone give an example of a polar covalent bond?
by Endri Dis 1J
Thu May 24, 2018 10:15 pm
Forum: Ionic & Covalent Bonds
Topic: Formal charge?
Replies: 12
Views: 461

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.
by Endri Dis 1J
Thu May 24, 2018 9:58 pm
Forum: Lewis Structures
Topic: Test 3 [ENDORSED]
Replies: 4
Views: 357

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.
by Endri Dis 1J
Fri May 18, 2018 2:43 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7578
Views: 1012312

Re: Post All Chemistry Jokes Here

What did the three hydrogens say to the nitrogen?
AM-MON-IA
by Endri Dis 1J
Fri May 18, 2018 2:36 am
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 3
Views: 226

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.
by Endri Dis 1J
Fri May 18, 2018 2:30 am
Forum: Quantum Numbers and The H-Atom
Topic: Midterm Question
Replies: 13
Views: 478

Re: Midterm Question

Wasn't the dilution/ concentration one part of the video module questions?
by Endri Dis 1J
Fri May 18, 2018 2:27 am
Forum: Octet Exceptions
Topic: Radicals/Octet Rule
Replies: 2
Views: 135

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...
by Endri Dis 1J
Fri May 18, 2018 2:12 am
Forum: Lewis Structures
Topic: Test #3
Replies: 11
Views: 377

Re: Test #3

Don't worry I'm pretty sure professor Lavelle will go over what is essential for us to know.
by Endri Dis 1J
Fri May 11, 2018 1:30 am
Forum: Quantum Numbers and The H-Atom
Topic: Midterm Question
Replies: 13
Views: 478

Re: Midterm Question

So to clarify, we didn't need include ms which is just the basic -1/2and +1/2?
by Endri Dis 1J
Fri May 11, 2018 1:23 am
Forum: Octet Exceptions
Topic: Octet exceptions and Formal charges.
Replies: 6
Views: 362

Re: Octet exceptions and Formal charges.

Oh and also for the formal charge calculation is there an easier way to calculate the charge?
by Endri Dis 1J
Fri May 11, 2018 1:19 am
Forum: Octet Exceptions
Topic: Octet exceptions and Formal charges.
Replies: 6
Views: 362

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?
by Endri Dis 1J
Thu May 10, 2018 10:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing Lewis Structures
Replies: 5
Views: 230

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?
by Endri Dis 1J
Fri May 04, 2018 1:57 am
Forum: Molarity, Solutions, Dilutions
Topic: Key for Test #1
Replies: 4
Views: 207

Re: Key for Test #1

Does this also apply to test #2?
by Endri Dis 1J
Fri May 04, 2018 1:54 am
Forum: Trends in The Periodic Table
Topic: Periodic Table Trends on the Midterm
Replies: 4
Views: 200

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.
by Endri Dis 1J
Fri May 04, 2018 1:46 am
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 4
Views: 169

Re: Ionization Energy

What's the difference between Ionization energies and electron affinities?
by Endri Dis 1J
Thu Apr 26, 2018 10:56 pm
Forum: Properties of Light
Topic: Rydberg Formula for Atomic Hydrogen [ENDORSED]
Replies: 4
Views: 271

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...
by Endri Dis 1J
Thu Apr 26, 2018 10:44 pm
Forum: DeBroglie Equation
Topic: When to use DeBroglie or Ek equation
Replies: 7
Views: 299

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?
by Endri Dis 1J
Thu Apr 26, 2018 10:39 pm
Forum: DeBroglie Equation
Topic: DeBroglie
Replies: 7
Views: 261

Re: DeBroglie

Can someone give an example of a practice problem that uses the DeBroglie Equation?
by Endri Dis 1J
Fri Apr 20, 2018 1:33 am
Forum: Properties of Light
Topic: still don't uderrsatnd what a photon is [ENDORSED]
Replies: 20
Views: 411

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.
by Endri Dis 1J
Fri Apr 20, 2018 1:22 am
Forum: Empirical & Molecular Formulas
Topic: Test #1 Question
Replies: 7
Views: 387

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.
by Endri Dis 1J
Fri Apr 20, 2018 1:10 am
Forum: Empirical & Molecular Formulas
Topic: empirical vs molecular
Replies: 5
Views: 282

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.
by Endri Dis 1J
Fri Apr 20, 2018 1:03 am
Forum: Student Social/Study Group
Topic: Study Group
Replies: 8
Views: 426

Re: Study Group

Count me in as well, I could use all the help I can get! endriedithgonzalez@gmail.com
by Endri Dis 1J
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: 121

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.
by Endri Dis 1J
Fri Apr 13, 2018 2:05 am
Forum: Limiting Reactant Calculations
Topic: actual vs. theoretical yield [ENDORSED]
Replies: 6
Views: 377

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.
by Endri Dis 1J
Fri Apr 13, 2018 1:56 am
Forum: Limiting Reactant Calculations
Topic: Two limiting reactants?
Replies: 10
Views: 776

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...
by Endri Dis 1J
Fri Apr 13, 2018 1:45 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Definition of moles [ENDORSED]
Replies: 5
Views: 232

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.
by Endri Dis 1J
Mon Apr 09, 2018 2:50 am
Forum: Balancing Chemical Reactions
Topic: Balancing the Equation
Replies: 9
Views: 411

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...
by Endri Dis 1J
Mon Apr 09, 2018 2:43 am
Forum: Balancing Chemical Reactions
Topic: Another Way to Balance
Replies: 7
Views: 264

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.

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