Search found 31 matches

by Kelly Zhang 1L
Thu Dec 06, 2018 7:12 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strongs Acids
Replies: 4
Views: 36

Re: Strongs Acids

you should probably memorize the 7 strong acids:

HS04
HNO3
HClO4
HClO3
HBr
HI
HCl
by Kelly Zhang 1L
Thu Dec 06, 2018 7:10 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: How to tell if something is a chelate
Replies: 6
Views: 47

Re: How to tell if something is a chelate

Do chelates have to be in ring structures or does it need to be bound by 2 elements?
by Kelly Zhang 1L
Thu Dec 06, 2018 7:07 pm
Forum: Naming
Topic: oxidation number
Replies: 4
Views: 28

Re: oxidation number

How do you find oxidation numbers of compounds? Should we just know oxidation numbers for all the elements in the periodic table?
by Kelly Zhang 1L
Fri Nov 30, 2018 11:07 am
Forum: Lewis Acids & Bases
Topic: Lewis acid and base
Replies: 5
Views: 41

Re: Lewis acid and base

Can comething be a lewis base but not a bronsted base?
by Kelly Zhang 1L
Fri Nov 30, 2018 11:05 am
Forum: Calculating the pH of Salt Solutions
Topic: Ka Constant
Replies: 4
Views: 38

Re: Ka Constant

Dr. Lavelle said no, calculating equilibrium constant is covered in 14b.
by Kelly Zhang 1L
Fri Nov 30, 2018 11:04 am
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Weak Bases with Nitrogen
Replies: 4
Views: 44

Re: Weak Bases with Nitrogen

I'm not sure how right I am, but I'll give this a shot. I think that nitrogen has the lone pair because the free electron pair in nitrogen shares those electrons with a proton to form a cation. So when NH3 is reacted with H20, it shares that electron pair with the hydrogen atom in H2O.
by Kelly Zhang 1L
Tue Nov 27, 2018 11:46 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Central atom
Replies: 5
Views: 47

Central atom

For the lewis structures, how do we determine which atom is the central atom?
by Kelly Zhang 1L
Mon Nov 19, 2018 2:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular geometry vs Electronicgeometry
Replies: 3
Views: 27

Re: Molecular geometry vs Electronicgeometry

What is the difference between molecular geometry vs electronicgeometry? Electronic geometry describes the shape of a molecule based on the number and arrangement of electron pairs around a central atom. Molecular geometry is describing the shape of the molecule in terms of bonds. So if a molecule ...
by Kelly Zhang 1L
Mon Nov 19, 2018 2:31 pm
Forum: Hybridization
Topic: breaking pi bonds
Replies: 1
Views: 28

Re: breaking pi bonds

Marsenne Cabral 1A wrote:What is an example of when pi bods break in the natural world if there are any?


An example could be the heating of ethylene (C2H4). The heat causes the pi bonds to break by rotating it back and forth, thus breaking that bond.
by Kelly Zhang 1L
Mon Nov 19, 2018 2:25 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: AXE
Replies: 7
Views: 91

Re: AXE

Can you always determine the molecular shape of a molecule just from the VSEPR notation?
by Kelly Zhang 1L
Wed Nov 14, 2018 9:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 8
Views: 82

Re: Bond Angles

What is the molecular geometry that gives bond angles of 106 degrees?
by Kelly Zhang 1L
Wed Nov 14, 2018 9:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 4
Views: 44

Re: Molecular Shape

If a structure has 2 single bonds and 2 lone pairs, is the molecular shape tetrahedral but the molecular geometry is bent?
by Kelly Zhang 1L
Wed Nov 14, 2018 9:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 6
Views: 46

Re: Molecular Shape

If a structure has two single bonds and two lone pairs, is the shape of this bent?
by Kelly Zhang 1L
Tue Nov 06, 2018 8:14 pm
Forum: Octet Exceptions
Topic: Octet rule vs. Formal charge
Replies: 7
Views: 66

Re: Octet rule vs. Formal charge

For elements with expanded octets, is there no maximum number of bonds it's allowed to have? Is it just the number of bonds that will satisfy the lowest formal charge rule?
by Kelly Zhang 1L
Tue Nov 06, 2018 8:12 pm
Forum: Sigma & Pi Bonds
Topic: Definition and distinguishing
Replies: 3
Views: 49

Re: Definition and distinguishing

Does the orientation or shape of molecules affect the length of its bonds?
by Kelly Zhang 1L
Tue Nov 06, 2018 8:09 pm
Forum: Dipole Moments
Topic: london forces
Replies: 7
Views: 191

Re: london forces

Is there a specific way we can tell when london forces are acting in molecules?
by Kelly Zhang 1L
Wed Oct 31, 2018 8:04 pm
Forum: Resonance Structures
Topic: General guideline for drawing structures
Replies: 4
Views: 109

Re: General guideline for drawing structures

when we draw resonance structures, if it has a net overall charge of -2, do we have to bracket the drawing and write subscript -2?
by Kelly Zhang 1L
Wed Oct 31, 2018 8:01 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge purpose
Replies: 33
Views: 770

Re: Formal charge purpose

why is the element most stable when its formal charge is 0?
by Kelly Zhang 1L
Wed Oct 31, 2018 7:58 pm
Forum: Ionic & Covalent Bonds
Topic: Multi-Electron Atom
Replies: 3
Views: 60

Re: Multi-Electron Atom

Why can't q1q2/r^2 be applied to a hydrogen atom?
by Kelly Zhang 1L
Wed Oct 24, 2018 8:02 pm
Forum: *Shrodinger Equation
Topic: Shrodinger Equation on Outline
Replies: 2
Views: 120

Re: Shrodinger Equation on Outline

Will we have to answer questions using Schrodinger's equation?
by Kelly Zhang 1L
Wed Oct 24, 2018 8:01 pm
Forum: *Shrodinger Equation
Topic: Schrodinger's wave function
Replies: 2
Views: 143

Re: Schrodinger's wave function

A wave function is used to describe it because an electron has wave like properties. So because we cannot know both the momentum AND the position, we utilize a wave function.
by Kelly Zhang 1L
Wed Oct 24, 2018 7:55 pm
Forum: Properties of Light
Topic: Quantum Test
Replies: 11
Views: 219

Re: Quantum Test

Do we have to memorize all the formulas we'll have to use?
by Kelly Zhang 1L
Thu Oct 18, 2018 12:17 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbital Series question
Replies: 2
Views: 19

Re: Orbital Series question

how many suborbitals are in the s, p, d and f orbitals?
by Kelly Zhang 1L
Wed Oct 17, 2018 11:07 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Difference in orbitals
Replies: 3
Views: 37

Difference in orbitals

what does the orbital structure look like for f-orbitals?
by Kelly Zhang 1L
Tue Oct 16, 2018 9:12 am
Forum: Photoelectric Effect
Topic: Spectroscopic series
Replies: 2
Views: 51

Spectroscopic series

What are the different Spectroscopic series? Is it the lyman and Balmer series?
by Kelly Zhang 1L
Wed Oct 10, 2018 7:54 pm
Forum: SI Units, Unit Conversions
Topic: State of the molecules
Replies: 4
Views: 110

State of the molecules

On the test, if we are given a word problem to balance a chemical reaction, do we have to write the state the molecules are in?
by Kelly Zhang 1L
Tue Oct 09, 2018 8:22 pm
Forum: Properties of Electrons
Topic: Kinetic energy
Replies: 4
Views: 59

Kinetic energy

Are there any physical signs/properties that indicate how fast the kinetic energy of an ejected electron is?
by Kelly Zhang 1L
Tue Oct 09, 2018 9:14 am
Forum: Properties of Light
Topic: electron volts conversion
Replies: 1
Views: 31

electron volts conversion

Do we have to know what constant (1.602x10^-14 J/ 1eV) to multiple the given work function (in electron volts) by on tests and quizzes? And why is the value for the constant 1.602x10^-14? Thank you!
by Kelly Zhang 1L
Fri Oct 05, 2018 9:05 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: % Yield
Replies: 8
Views: 164

Re: % Yield

From what I learned in AP chem, there is no "acceptable" percent yield. When it asks for percent yield, its simply asking for you to calculate how much is produced vs the theoretical. The problems will typically ask what is the percent yield and will not ask you to interpret the percent yi...
by Kelly Zhang 1L
Fri Oct 05, 2018 8:59 am
Forum: SI Units, Unit Conversions
Topic: SI Units
Replies: 7
Views: 95

Re: SI Units

When we're doing problems, do we need to show units for our work to get credit?
by Kelly Zhang 1L
Tue Oct 02, 2018 10:14 am
Forum: SI Units, Unit Conversions
Topic: formula units [ENDORSED]
Replies: 68
Views: 20036

Re: formula units [ENDORSED]

Hello hello! I just had a quick question regarding formula units. What is the difference between number of atoms and formula units? For section E's homework 9b, the number of atoms and formula units came out to be different answers.

Go to advanced search