Search found 30 matches

by Abby De La Merced 3F
Sun Dec 09, 2018 1:01 am
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E 7 7th edition
Replies: 1
Views: 144

2E 7 7th edition

Is the answer book wrong on this problem? I got the VSEPR shape to be AX2E but the book says it that is trigonal pyramidal. Shouldn't it be bent?
by Abby De La Merced 3F
Sat Dec 08, 2018 8:04 pm
Forum: Naming
Topic: metal ions
Replies: 1
Views: 74

Re: metal ions

Are you talking about the ligands? I think we need to know edta, en, and dien.
by Abby De La Merced 3F
Sat Dec 08, 2018 12:17 pm
Forum: Naming
Topic: Cation Naming
Replies: 2
Views: 113

Cation Naming

Just to clarify, you add -ate onto the end of a transition metal when the anion is the complex ion and not the cation?
by Abby De La Merced 3F
Fri Nov 30, 2018 7:59 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.33
Replies: 1
Views: 86

Re: 17.33

I believe that polydentate refers to ligands that are bonded with more than one atom.
by Abby De La Merced 3F
Fri Nov 30, 2018 7:56 pm
Forum: Naming
Topic: Naming
Replies: 1
Views: 72

Naming

When do we use Roman numerals when naming? Are there only certain elements that need to have them?
by Abby De La Merced 3F
Fri Nov 30, 2018 7:54 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 10
Views: 274

Re: Coordination Number

I remember the coordination number as the number of bonds to the central atom.
by Abby De La Merced 3F
Fri Nov 30, 2018 7:48 pm
Forum: Dipole Moments
Topic: Induced Dipole - Induced Dipole
Replies: 3
Views: 155

Induced Dipole - Induced Dipole

Are induced dipole - induced dipole the same as dipole - dipole? I have that term written down in my notes but I am not exactly sure what the difference between them is?
by Abby De La Merced 3F
Fri Nov 30, 2018 7:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw
Replies: 13
Views: 531

Seesaw

Are the bond angles for the seesaw shape <120 degrees and <180 or is it 90 and 120?
by Abby De La Merced 3F
Fri Nov 30, 2018 7:44 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.31
Replies: 2
Views: 96

Re: 17.31

Is this problem set from the 7th edition book?
by Abby De La Merced 3F
Wed Nov 14, 2018 7:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How are polarity and polarizability different?
Replies: 3
Views: 431

Re: How are polarity and polarizability different?

Polarity is the distribution of electric charge in a molecule, while I am pretty sure that every molecule, polar or not, has a polarizability. That polarizability is dependent the number of electrons and size of atom/molecule. I am kind of confused about this concept as well but I hope this somewhat...
by Abby De La Merced 3F
Wed Nov 14, 2018 7:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: H20
Replies: 3
Views: 170

Re: H20

Thank you! Can you explain what difference between electron geometry and molecular geometry is?
by Abby De La Merced 3F
Wed Nov 14, 2018 7:39 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: IMFs [ENDORSED]
Replies: 2
Views: 159

Re: IMFs [ENDORSED]

In the practice problems I've seen so far, it doesn't seem like we need to know how IMFs affect surface tension or viscosity. I think we mostly need to understand how IMFs work themselves and how to differentiate between all the different types of them.
by Abby De La Merced 3F
Wed Nov 14, 2018 7:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: H20
Replies: 3
Views: 170

H20

What kind of molecular shape would H20 take on? Is it tetrahedral or bent and why? I seemed to get confused about this example in section today.
by Abby De La Merced 3F
Sat Nov 10, 2018 11:59 pm
Forum: Dipole Moments
Topic: Induced-Dipole Induced-Dipole
Replies: 5
Views: 311

Induced-Dipole Induced-Dipole

Can someone explain what this concept is? And how it relates to electron distribution?
by Abby De La Merced 3F
Sat Nov 10, 2018 11:52 pm
Forum: Dipole Moments
Topic: Interaction Potential Energy
Replies: 4
Views: 122

Re: Interaction Potential Energy

Does anyone know what kind of conceptual question could be asked regarding this topic? I don't seem to know where in my notes this was discussed. Thank you!
by Abby De La Merced 3F
Sat Nov 10, 2018 11:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar and Nonpolar Molecules
Replies: 4
Views: 153

Re: Polar and Nonpolar Molecules

Polar molecules have two parts with opposite charges that attract to one another, but non polar molecules do not have dipole, therefore they do not have opposing charges.
by Abby De La Merced 3F
Sat Nov 10, 2018 11:44 pm
Forum: Electronegativity
Topic: Electronegativity and Electron Affinity
Replies: 4
Views: 209

Electronegativity and Electron Affinity

In my notes from section for periodic trends, it says that electronegativity and electronegativity have the same trends. Can someone explain what the difference between the two are in simple terms? I seem to be getting this concept confused.
by Abby De La Merced 3F
Sat Nov 10, 2018 11:37 pm
Forum: Dipole Moments
Topic: Bond Lengths
Replies: 5
Views: 255

Re: Bond Lengths

Yes, like said above, single bonds are the longest and weakest bonds, while triple bonds are the shortest but the strongest types of bonds with double bonds in the middle of the two. The shorter bonds are more likely involved in a reaction, and shorter bonds tend to be less reactive.
by Abby De La Merced 3F
Fri Nov 02, 2018 10:08 pm
Forum: Lewis Structures
Topic: Formal Charges
Replies: 2
Views: 104

Formal Charges

Im sorry this might be a dumb question, but when we are writing out the Lewis structures, I know that we write the least electronegative atom in the center, but when we write the atoms on the outside does it matter where they go when we are trying to find their formal charges?
by Abby De La Merced 3F
Fri Nov 02, 2018 9:34 pm
Forum: Resonance Structures
Topic: 2B.19 (7th ed)
Replies: 2
Views: 112

Re: 2B.19 (7th ed)

I am kind of confused about this too. Does having two lone pairs instead of one make the structure more stable?
by Abby De La Merced 3F
Fri Nov 02, 2018 9:14 pm
Forum: Electronegativity
Topic: ionic vs. covalent bonding
Replies: 2
Views: 152

ionic vs. covalent bonding

I know that in lecture we learned that if the electronegativity difference is greater than two than there is an ionic bond and if the different is less than 1.5 then there is a covalent bond but what if the electronegativity difference is in the .5 between 1.5 and 2?
by Abby De La Merced 3F
Tue Oct 23, 2018 7:24 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Test 2 and Homework Problems
Replies: 6
Views: 264

Re: Test 2 and Homework Problems

Does anyone know if the test is strictly problem based or will there be conceptual questions as well?
by Abby De La Merced 3F
Tue Oct 23, 2018 7:21 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1A 15 7th edition help
Replies: 1
Views: 120

1A 15 7th edition help

How would you begin to solve this question? In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line. I know it has to do with the R...
by Abby De La Merced 3F
Tue Oct 23, 2018 6:41 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: HW Question Regarding 1B.27
Replies: 6
Views: 204

Re: HW Question Regarding 1B.27

Wait, can someone actually explain why the change in velocity would be 10 and not 5 like it says in the solutions manual?
by Abby De La Merced 3F
Thu Oct 18, 2018 7:24 pm
Forum: Einstein Equation
Topic: wave vs particle behavior equations
Replies: 2
Views: 128

Re: wave vs particle behavior equations

Yes to all three parts of your question. The equation you mentioned should be used to find either waves or particles but you need one to find the other.
by Abby De La Merced 3F
Thu Oct 18, 2018 7:05 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Homework Problem 2.13
Replies: 1
Views: 60

Re: Homework Problem 2.13

I believe that the orbital of the lobe refers to where it borders the axises.
by Abby De La Merced 3F
Tue Oct 16, 2018 8:56 pm
Forum: Einstein Equation
Topic: 1B 9 7th edition
Replies: 2
Views: 137

1B 9 7th edition

Quick question - when finding the number of photons of violet light that can be generated in 2.0 s, why do you divide 64 J by 4.7 x 10^-19 instead of multiplying the two values?
by Abby De La Merced 3F
Fri Oct 05, 2018 11:48 am
Forum: Balancing Chemical Reactions
Topic: Balancing reactions tips
Replies: 29
Views: 1113

Re: Balancing reactions tips

My TA advised that your best bet with balancing equations properly and efficiently was to alway balance the single element last as its the easiest to manipulate when all the other parts of the balancing are done. And start with the least occurring element too.
by Abby De La Merced 3F
Fri Oct 05, 2018 11:31 am
Forum: SI Units, Unit Conversions
Topic: units during dimensional analysis
Replies: 4
Views: 145

Re: units during dimensional analysis

I feel that writing out my units makes it a little easier for me to understand where the problem is headed and what final units I need to end up with are. It does take up space and more time, but in the end it's better for understanding as a whole.
by Abby De La Merced 3F
Wed Oct 03, 2018 9:28 pm
Forum: SI Units, Unit Conversions
Topic: Homework Question Edition 6 E1
Replies: 4
Views: 187

Re: Homework Question Edition 6 E1

I am also struggling with trying to figure out why the conversion works out like that as well. I am also confused about why 144pm is multiplied by 2 when doing the dimensional analysis method on the problem too.

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