Search found 58 matches

by Mallika Chimpiri 3K
Sun Dec 08, 2019 7:33 pm
Forum: Naming
Topic: Cisplatin
Replies: 3
Views: 96

Re: Cisplatin

This is because Guanine has Nitrogens with lone pairs that bond with the Cl atoms in cisplatin.
by Mallika Chimpiri 3K
Sun Dec 08, 2019 7:32 pm
Forum: Bronsted Acids & Bases
Topic: NH3
Replies: 5
Views: 110

Re: NH3

NH3 is amphiprotic, meaning it can act as a base or an acid, so you have to look at the reaction!
by Mallika Chimpiri 3K
Sun Dec 08, 2019 7:30 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Ph and poH of weak acids
Replies: 8
Views: 81

Re: Ph and poH of weak acids

We learn to calculate this in 14B!
by Mallika Chimpiri 3K
Sun Dec 08, 2019 7:29 pm
Forum: Hybridization
Topic: 2sp2 and sp2
Replies: 10
Views: 145

Re: 2sp2 and sp2

You should specify 2sp2 only if the orbital is asked!
by Mallika Chimpiri 3K
Sun Dec 08, 2019 7:29 pm
Forum: Naming
Topic: -ate
Replies: 10
Views: 185

Re: -ate

No, ate is only added to an anion!
by Mallika Chimpiri 3K
Wed Dec 04, 2019 11:22 pm
Forum: Lewis Acids & Bases
Topic: Acid Names
Replies: 1
Views: 25

Acid Names

Are there any acids that we should memorize and be able to name if used in a question?
by Mallika Chimpiri 3K
Wed Dec 04, 2019 10:01 pm
Forum: Naming
Topic: Ligands
Replies: 2
Views: 35

Ligands

Do we have to memorize the common ligands chart in section 9C.1 of the textbook?
by Mallika Chimpiri 3K
Mon Dec 02, 2019 5:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Final tips
Replies: 19
Views: 213

Re: Final tips

I would definitely take advantage of the review material and session provided by the Undergraduate and Teaching assistants!
by Mallika Chimpiri 3K
Mon Dec 02, 2019 4:56 pm
Forum: Calculating the pH of Salt Solutions
Topic: Change in pH of a solution
Replies: 2
Views: 33

Re: Change in pH of a solution

This is because depending on the molecule, conjugates of it may affect the concentration of hydroxide and hydronium ions, which affects the pH.
by Mallika Chimpiri 3K
Mon Dec 02, 2019 4:34 pm
Forum: Hybridization
Topic: Lone Pairs
Replies: 2
Views: 37

Re: Lone Pairs

Yes it does work, you just have to account for lone pairs when determining hybridization.
by Mallika Chimpiri 3K
Mon Dec 02, 2019 4:33 pm
Forum: Bond Lengths & Energies
Topic: Boiling point
Replies: 11
Views: 257

Re: Boiling point

The greater the molar mass, the higher the boiling point.
by Mallika Chimpiri 3K
Mon Dec 02, 2019 4:33 pm
Forum: Electronegativity
Topic: Atom size
Replies: 16
Views: 401

Re: Atom size

Electronegativity and atomic size have opposite trends.
by Mallika Chimpiri 3K
Sat Nov 23, 2019 8:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPER shape for IF4-
Replies: 5
Views: 56

Re: VSEPER shape for IF4-

It would be square planar.
by Mallika Chimpiri 3K
Sat Nov 23, 2019 8:19 pm
Forum: Resonance Structures
Topic: Resonance and Naming
Replies: 11
Views: 217

Re: Resonance and Naming

No, resonance just refers to variations in writing the structures.
by Mallika Chimpiri 3K
Sat Nov 23, 2019 8:17 pm
Forum: Sigma & Pi Bonds
Topic: How to Find Sigma Bonds and Pi Bonds
Replies: 15
Views: 296

Re: How to Find Sigma Bonds and Pi Bonds

A single bond has a sigma bond, a double bond has one sigma bond and one pi bond, a triple bond has one sigma bond and two pi bonds.
by Mallika Chimpiri 3K
Sat Nov 23, 2019 8:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw
Replies: 23
Views: 197

Re: Seesaw

Yes, it should be less than 90 and 120.
by Mallika Chimpiri 3K
Sat Nov 16, 2019 8:37 pm
Forum: Hybridization
Topic: test 2
Replies: 8
Views: 85

test 2

is hybridization and sigma/pi bonds going to be on test 2?
by Mallika Chimpiri 3K
Thu Nov 14, 2019 3:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW 2.63
Replies: 2
Views: 30

Re: HW 2.63

Ziyan Wang 3J wrote:In order to fulfill octet rule, there must be two lone pairs of electron around O (since bonding pairs only account for four electrons), thus O have 4 electron domains and its bonding angle is 109.5 (similar to tetrahedral).


that makes sense, thank u!
by Mallika Chimpiri 3K
Thu Nov 14, 2019 3:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: format of test
Replies: 5
Views: 60

format of test

Does anyone know what the format of Test 2 will be?
by Mallika Chimpiri 3K
Thu Nov 14, 2019 2:57 pm
Forum: Bond Lengths & Energies
Topic: Electron Density
Replies: 10
Views: 160

Re: Electron Density

Yes they are considered regions of electron density
by Mallika Chimpiri 3K
Thu Nov 14, 2019 2:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.11
Replies: 4
Views: 32

Re: 2E.11

This is because although IF4- has 6 areas of electron density, you only look at bonded electrons when determining molecular shape. It has 4 bonds with 2 lone pairs, which gives it an octahedral electron arrangement but a square planar molecular geometry.
by Mallika Chimpiri 3K
Thu Nov 14, 2019 2:45 pm
Forum: Hybridization
Topic: 2F.5
Replies: 4
Views: 51

Re: 2F.5

To find the hybridization, count up how many bonds and lone pairs the atom has. If it is 3, then the hybridization would be sp2. If it is 4, then the hybridization would be sp3, and so on. For BeCl2, Be is the central atom and has 2 bonds and no lone pairs, so its hybridization would be sp.
by Mallika Chimpiri 3K
Thu Nov 14, 2019 2:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW 2.63
Replies: 2
Views: 30

HW 2.63

For homework problem 2.63, why is the bond angle for arc b 109.5 degrees?
by Mallika Chimpiri 3K
Wed Nov 13, 2019 7:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar vs. Nonpolar
Replies: 12
Views: 135

Polar vs. Nonpolar

Can someone explain how to determine if a molecule is polar or non polar by looking at its molecular geometry/shape?
by Mallika Chimpiri 3K
Wed Nov 13, 2019 4:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Exam 2
Replies: 3
Views: 60

Exam 2

What are all the topics included on Exam 2?
by Mallika Chimpiri 3K
Sun Nov 10, 2019 3:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 7
Views: 71

Re: Test 2

Does anyone know which week Test 2 will be?
by Mallika Chimpiri 3K
Sun Nov 10, 2019 3:47 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Equation?
Replies: 12
Views: 75

Re: Formal Charge Equation?

In the first equation, B is counted as a bond, while in the second equations B is counted as each shared electron. That's why when counted as singular electrons, it has to be divided by 2 to account for the bonds.
by Mallika Chimpiri 3K
Sun Nov 10, 2019 3:44 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Magnetic Quantum numbers
Replies: 13
Views: 269

Re: Magnetic Quantum numbers

To determine magnetic quantum number (ml), you must look at the angular momentum number (l). ml can be any value from -l to +l. For example, if l=2, then ml=-2, -1, 0, 1, 2. If l=0, then ml has one possible value, = 0.
by Mallika Chimpiri 3K
Sun Nov 10, 2019 2:22 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability
Replies: 3
Views: 43

Polarizability

Can anyone explain the periodic trend for polarizability and the trend for polarizing power?
by Mallika Chimpiri 3K
Sun Nov 10, 2019 2:12 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability
Replies: 4
Views: 44

Polarizability

Can anyone explain the periodic trend for polarizability and the trend for polarizing power?
by Mallika Chimpiri 3K
Sun Nov 10, 2019 2:10 pm
Forum: Dipole Moments
Topic: Dipole moments
Replies: 6
Views: 51

Dipole moments

How exactly does a dipole moment occur? and how is it induced?
by Mallika Chimpiri 3K
Sun Nov 03, 2019 11:07 pm
Forum: *Shrodinger Equation
Topic: effective nuclear charge
Replies: 6
Views: 263

effective nuclear charge

Can someone explain what effective nuclear charge means?
by Mallika Chimpiri 3K
Sun Nov 03, 2019 11:04 pm
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 393

Re: What are the units of hertz

1 cycle/second!
by Mallika Chimpiri 3K
Sun Nov 03, 2019 10:46 pm
Forum: General Science Questions
Topic: Step Up Sessions
Replies: 3
Views: 44

Re: Step Up Sessions

Does anyone know when/where the step up sessions are for this Monday and Tuesday?
by Mallika Chimpiri 3K
Sun Nov 03, 2019 10:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterms
Replies: 6
Views: 89

Re: Midterms

Yes! We have one more test and then our final.
by Mallika Chimpiri 3K
Sun Nov 03, 2019 10:34 pm
Forum: Lewis Structures
Topic: Octet Rule
Replies: 6
Views: 72

Re: Octet Rule

The octet rule basically means an atom must have 8 electrons in their valence shells and will bond in arrangements that allow for that. But there can be exceptions to the octet rule, such as CH3 and BF3 where the atom in the center doesn't have a full valence shell.
by Mallika Chimpiri 3K
Sun Nov 03, 2019 10:27 pm
Forum: Lewis Structures
Topic: Resonance
Replies: 5
Views: 47

Re: Resonance

You can figure out if resonance occurs when you draw out the Lewis structure. For example for a nitrate ion (NO3-), an NO double bond is required for all 4 atoms to have an octet. Because there are 3 oxygen atoms, the double bond can be drawn on any one of them, resulting in 3 possible structures.
by Mallika Chimpiri 3K
Sun Oct 27, 2019 10:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Format
Replies: 11
Views: 156

Re: Midterm Format

I know it's still weeks away but I was wondering, does anyone know about the format of the midterm? Is it comparable to Test 1 but just longer in length? What types of questions will be on it and which units does it cover? Where is the midterm located? Will that be announced closer to the midterm d...
by Mallika Chimpiri 3K
Sun Oct 27, 2019 10:42 pm
Forum: Resonance Structures
Topic: Midterm
Replies: 4
Views: 43

Midterm

Does anyone know what all the topics for the Midterm include?
by Mallika Chimpiri 3K
Sun Oct 27, 2019 10:37 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 58
Views: 1315

Re: Advice for studying

Aside from the textbook problems and online video modules, I would recommend doing to the Step-Up sessions and the upcoming midterm review sessions if you feel that you study well with others around; it would be a good way to clarify and reinforce concepts.
by Mallika Chimpiri 3K
Sun Oct 27, 2019 10:34 pm
Forum: *Particle in a Box
Topic: TEST 2
Replies: 13
Views: 365

Re: TEST 2

Test 2 is during week 8 on whichever day you have discussion! As for studying, I think the best is way to go over what the syllabus states in the textbook but go through the video modules and notes from lectures to reinforce all the material.
by Mallika Chimpiri 3K
Sun Oct 27, 2019 1:58 pm
Forum: Properties of Light
Topic: Value for C
Replies: 8
Views: 96

Value for C

What value is recommended we use for the c constant during calculations? 2.998e8 or 3.00e8?
by Mallika Chimpiri 3K
Sun Oct 20, 2019 9:52 pm
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 393

Re: What are the units of hertz

I cycle per second
by Mallika Chimpiri 3K
Sun Oct 20, 2019 9:50 pm
Forum: DeBroglie Equation
Topic: Unit Conversion
Replies: 5
Views: 73

Re: Unit Conversion

I MHz is equivalent to 10^6 Hz, so using that conversion you should be able to go from MHz to Hz and vice versa.
by Mallika Chimpiri 3K
Sun Oct 20, 2019 9:43 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Paired & Parallel Electrons
Replies: 4
Views: 32

Re: Paired & Parallel Electrons

Parallel electrons have the same spin state, meaning they both go up or both go down. Paired electrons, on the other hand, have opposite spin states, meaning one goes up and one goes down.
by Mallika Chimpiri 3K
Sun Oct 20, 2019 9:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configurations of ions
Replies: 4
Views: 37

Re: Electron configurations of ions

A negative charge on an ion indicates that it gained electrons, while a positive charge indicates that the ion lost electrons.
by Mallika Chimpiri 3K
Sun Oct 20, 2019 9:35 pm
Forum: Properties of Light
Topic: N levels
Replies: 8
Views: 85

Re: N levels

The N value signifies the energy level of an electron, and is called the Principle Quantum Number. The n value increase basically when an electron is excited and increases in energy level.The n value decreases when an electron emits energy and decreases in energy level.
by Mallika Chimpiri 3K
Sun Oct 13, 2019 5:21 pm
Forum: Significant Figures
Topic: Sig Figs at the Beginning or End
Replies: 14
Views: 380

Re: Sig Figs at the Beginning or End

If the problem requires many calculations and steps, I would end each step with more significant figures than necessary just to avoid any error. At the very end, round your final answer to how many ever significant figures are necessary. I think this is crucial because even rounding slightly up or d...
by Mallika Chimpiri 3K
Sun Oct 13, 2019 5:12 pm
Forum: Significant Figures
Topic: When to apply Sig Figs
Replies: 6
Views: 180

Re: When to apply Sig Figs

I don't apply sig figs in between steps or calculations just to avoid error that could come from rounding prematurely.
by Mallika Chimpiri 3K
Sun Oct 13, 2019 5:10 pm
Forum: Significant Figures
Topic: How Many Sig Figs
Replies: 7
Views: 227

Re: How Many Sig Figs

If that is the case, I would use decimal places to figure out rounding. Or, if you need to use the periodic table, use the sig figs of the molar masses to figure out the final sig fig value.
by Mallika Chimpiri 3K
Sun Oct 13, 2019 5:02 pm
Forum: SI Units, Unit Conversions
Topic: Unit conversion
Replies: 15
Views: 471

Re: Unit conversion

The conversion for Angstroms is 1 A = 10^-10 meters. Using this base conversion, you can convert to whatever desired unit.
by Mallika Chimpiri 3K
Sun Oct 13, 2019 5:00 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 1038

Re: Best Way To Study?

For me, reading the textbook definitely helps clarify the concepts that Professor Lavelle goes over in class. The practice problems are also great review and pretty much solidify the material.
by Mallika Chimpiri 3K
Sun Oct 06, 2019 7:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1
Replies: 3
Views: 65

Re: Test 1

I believe Test 1 covers the Review of Chemical & Physical Principles. So that would be all the Fundamentals sections in the textbook.
by Mallika Chimpiri 3K
Sun Oct 06, 2019 7:35 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molar Mass
Replies: 4
Views: 54

Re: Molar Mass

You won't have to memorize the molar masses from the periodic table but if the molar mass of a compound or element isn't given in the problem, you should be able to use the periodic table in order to calculate its molar mass. Usually, the molar mass is given and calculated with 4 significant figures.
by Mallika Chimpiri 3K
Sun Oct 06, 2019 7:29 pm
Forum: Empirical & Molecular Formulas
Topic: Rounding vs. Multiplying
Replies: 4
Views: 77

Re: Rounding vs. Multiplying

I would multiply to find another ratio if the decimal is more than .2 away from a whole number. So if I you had 1.1, I would just round down to 1.
by Mallika Chimpiri 3K
Sun Oct 06, 2019 7:25 pm
Forum: Empirical & Molecular Formulas
Topic: E15 Homework Problem
Replies: 3
Views: 77

E15 Homework Problem

" The molar mass of the metal hydroxide M(OH)2 is 74.10 g*mol^-1. What is the molar mass of the chloride of this metal? "
How would you go about this problem?
by Mallika Chimpiri 3K
Sun Oct 06, 2019 7:19 pm
Forum: Properties of Light
Topic: c = fλ
Replies: 9
Views: 94

Re: c = fλ

Yes, the c is a constant and will always equal 3.00 X 10^8. The frequency and wavelength vary inversely so their product will always equal the constant c.

Go to advanced search