Search found 51 matches

by Deana Moghaddas 3E
Sat Dec 07, 2019 4:59 pm
Forum: Lewis Acids & Bases
Topic: homework question 6A.17
Replies: 1
Views: 33

Re: homework question 6A.17

I know that As is an ion that makes a molecule amphoteric, I don't know about Bi though
by Deana Moghaddas 3E
Sat Dec 07, 2019 1:21 pm
Forum: Administrative Questions and Class Announcements
Topic: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
Replies: 111
Views: 4447

Re: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]

when will original marshmallow practice's answers be posted
by Deana Moghaddas 3E
Wed Dec 04, 2019 2:54 pm
Forum: Bronsted Acids & Bases
Topic: HOI vs HOCl
Replies: 3
Views: 29

Re: HOI vs HOCl

HOCl and HOI are both oxoacids and act quite differently, because of the oxygen involved in their structure. Since the electrons are withdrawn (or pulled due to the high electronegativity of oxygen and chlorine), they are delocalized and are more prone to get rid of the H+ proton than HOI. But when...
by Deana Moghaddas 3E
Wed Dec 04, 2019 2:51 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: CO3^2- Resonance and Polydentate
Replies: 2
Views: 23

Re: CO3^2- Resonance and Polydentate

The terms monodentate/bidentate don't apply to a molecule like this, they only apply to coordination compounds (transition metal bonded to atom)
by Deana Moghaddas 3E
Wed Dec 04, 2019 2:45 pm
Forum: Naming
Topic: Naming Acids/ Bases
Replies: 4
Views: 39

Re: Naming Acids/ Bases

Dont think so
by Deana Moghaddas 3E
Wed Dec 04, 2019 2:45 pm
Forum: Amphoteric Compounds
Topic: Amphoteric vs Amphiprotic
Replies: 9
Views: 69

Re: Amphoteric vs Amphiprotic

So are amphoteric and amphiprotic the same thing?
by Deana Moghaddas 3E
Wed Dec 04, 2019 2:43 pm
Forum: Biological Examples
Topic: Cisplatin
Replies: 6
Views: 71

Re: Cisplatin

Do we have to know that for the test?
by Deana Moghaddas 3E
Fri Nov 29, 2019 8:14 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pOH scale
Replies: 2
Views: 33

Re: pOH scale

Pretty sure its just traditional
by Deana Moghaddas 3E
Fri Nov 29, 2019 8:12 pm
Forum: Naming
Topic: Coordination Compounds on the Final
Replies: 4
Views: 38

Re: Coordination Compounds on the Final

What kinds of problems would these consist of? Just naming?
by Deana Moghaddas 3E
Fri Nov 29, 2019 8:11 pm
Forum: Lewis Acids & Bases
Topic: 6A.13
Replies: 7
Views: 52

Re: 6A.13

Since it has a positive charge, it is a cation and therefore lost electrons. Hence it will want to gain electrons/accept them
by Deana Moghaddas 3E
Fri Nov 29, 2019 8:09 pm
Forum: Lewis Acids & Bases
Topic: Strong Acids
Replies: 8
Views: 67

Re: Strong Acids

What are the ones that we're supposed to know?
by Deana Moghaddas 3E
Fri Nov 29, 2019 8:04 pm
Forum: Naming
Topic: charge of trnasition metal
Replies: 4
Views: 40

Re: charge of trnasition metal

it will always be given or you have to infer it based on the other charge within the molecule
by Deana Moghaddas 3E
Thu Nov 21, 2019 10:46 pm
Forum: Formal Charge and Oxidation Numbers
Topic: When to Use Formal Charge
Replies: 4
Views: 71

Re: When to Use Formal Charge

always use formal charge, and then try to create a structure that ends up with lowest formal charge/FC that matches the molecule. also try to arrange the molecule so that all the FC on each element is closest to 0
by Deana Moghaddas 3E
Thu Nov 21, 2019 10:44 pm
Forum: Dipole Moments
Topic: boiling point example
Replies: 3
Views: 50

Re: boiling point example

Cl is more electronegative than I so KCL has higher boiling point.
by Deana Moghaddas 3E
Thu Nov 21, 2019 10:36 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: 3F 15
Replies: 5
Views: 84

Re: 3F 15

AsF5 is non-polar while AsF3 is so it has more attractive dipole dipole forces, therefore requiring more energy to overcome IMFs
by Deana Moghaddas 3E
Tue Nov 19, 2019 3:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Linear Shape
Replies: 6
Views: 47

Re: Linear Shape

the molecule will maintain its linear shape even when its polar because the dipole moments may not be that large/attractive enough to change the shape in any way
by Deana Moghaddas 3E
Tue Nov 19, 2019 3:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bent v. angular
Replies: 20
Views: 209

Re: bent v. angular

bent and angular are just synonyms for each other
by Deana Moghaddas 3E
Sun Nov 17, 2019 2:12 pm
Forum: Trends in The Periodic Table
Topic: Question
Replies: 17
Views: 231

Re: Question

think of ionization energy as the energy needed to make an ion (to remove an electron)
think of electronegativity as an atom's attraction to gain electrons
by Deana Moghaddas 3E
Sun Nov 17, 2019 2:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vapor pressure
Replies: 4
Views: 28

Re: vapor pressure

we haven't explicitly covered it so no
by Deana Moghaddas 3E
Sun Nov 17, 2019 2:03 pm
Forum: Hybridization
Topic: sp^3 orbital
Replies: 3
Views: 28

Re: sp^3 orbital

sp3 means that the s orbital is filled but the p orbital is only half filled (3 electrons hence the 3 out of 6)
by Deana Moghaddas 3E
Sun Nov 17, 2019 2:01 pm
Forum: Hybridization
Topic: Test?
Replies: 6
Views: 62

Re: Test?

We still have Monday lecture too so it might be in that lecture and therefore on the test
by Deana Moghaddas 3E
Thu Nov 07, 2019 11:42 am
Forum: Photoelectric Effect
Topic: Midterm 1
Replies: 9
Views: 195

Re: Midterm 1

Anyone know when we'll get the midterm grades back?
by Deana Moghaddas 3E
Tue Nov 05, 2019 8:52 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Lyman
Replies: 1
Views: 48

Re: Lyman

the final is n = 1 and this is for UV light
by Deana Moghaddas 3E
Tue Nov 05, 2019 8:50 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect vs. De Broglie
Replies: 8
Views: 170

Re: Photoelectric Effect vs. De Broglie

speed of light can only be used for light/photons while de bregolie can be used with other types of particles
by Deana Moghaddas 3E
Sun Nov 03, 2019 9:16 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent
Replies: 14
Views: 133

Re: Ionic vs Covalent

EN greater than 2.5 = ionic
EN less than 1.5 = covalent
in the middle is a blend of both
by Deana Moghaddas 3E
Sun Nov 03, 2019 9:14 pm
Forum: Quantum Numbers and The H-Atom
Topic: Rules for n, l,m
Replies: 11
Views: 109

Re: Rules for n, l,m

n = shell
l = subshell
ml = orientation of orbitals
ms = electron spin
by Deana Moghaddas 3E
Sun Nov 03, 2019 9:12 pm
Forum: Electronegativity
Topic: Trends of the Periodic Table
Replies: 3
Views: 53

Re: Trends of the Periodic Table

atomic radius, ionic radius (increase down group, decrease across period)
electron affinity, electronegativity, ionization energy (decrease down group, increase across period)
by Deana Moghaddas 3E
Sun Nov 03, 2019 9:06 pm
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 324

Re: What are the units of hertz

1 cycle/second
by Deana Moghaddas 3E
Sun Nov 03, 2019 9:06 pm
Forum: Octet Exceptions
Topic: Octet Rule exceptions
Replies: 14
Views: 168

Re: Octet Rule exceptions

Elements beyond the 3rd period can potentially break the octet rule
by Deana Moghaddas 3E
Mon Oct 28, 2019 10:34 am
Forum: Octet Exceptions
Topic: aufbau principle
Replies: 8
Views: 93

Re: aufbau principle

The electrons are in a lower energy level (3) as opposed to the higher energy level of 4.
by Deana Moghaddas 3E
Mon Oct 28, 2019 10:29 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Transition Metals
Replies: 2
Views: 60

Re: Transition Metals

You really don't have to know that bit of information for that class, a question will always tell you what type of cation/anion it is
by Deana Moghaddas 3E
Mon Oct 28, 2019 10:27 am
Forum: Lewis Structures
Topic: Lewis Structure of Ions
Replies: 6
Views: 59

Re: Lewis Structure of Ions

Yes you put the bracket
by Deana Moghaddas 3E
Sun Oct 20, 2019 8:01 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s-, p-, d- ,f- orbitals
Replies: 10
Views: 110

Re: s-, p-, d- ,f- orbitals

x y z shows the axis on the orbitals
by Deana Moghaddas 3E
Sun Oct 20, 2019 8:00 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atomic orbitals
Replies: 5
Views: 59

Re: Atomic orbitals

the probability that this area is dense with electrons
by Deana Moghaddas 3E
Sun Oct 20, 2019 7:58 pm
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 324

Re: What are the units of hertz

1/s. For example, 13 Hz = 13/second would be 13 cycles per second
by Deana Moghaddas 3E
Sun Oct 20, 2019 7:57 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 8
Views: 89

Re: Orbitals

Can someone explain to me the specialty case of Chromium? With it having 4s1 instead of 4s2? For chromium, there are 4 levels (1,2,3,4). For chromium, the configuration at first glance would be 1s2,2s2,2p6,3s2,3p6,4s2,3d4. As you can see, the 3rd energy level seems to be filled after the 4th. Howev...
by Deana Moghaddas 3E
Sun Oct 20, 2019 7:51 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Spin up and spin down
Replies: 13
Views: 160

Re: Spin up and spin down

Just assume the electrons are oriented differently
by Deana Moghaddas 3E
Sun Oct 13, 2019 7:12 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 8
Views: 95

Re: E=hv

plancks constant
by Deana Moghaddas 3E
Sun Oct 13, 2019 7:05 pm
Forum: Properties of Light
Topic: Amplitude
Replies: 6
Views: 107

Re: Amplitude

Amplitude is indépendant of wavelength and frequency
by Deana Moghaddas 3E
Sun Oct 13, 2019 7:03 pm
Forum: Significant Figures
Topic: Significant Figures on Test 1
Replies: 3
Views: 121

Re: Significant Figures on Test 1

Im pretty sure Dr. Lavelle or my TA (don't remember) said we won't be using sig fig rules
by Deana Moghaddas 3E
Sun Oct 13, 2019 7:01 pm
Forum: Properties of Light
Topic: Visualizing wave-particle duality
Replies: 3
Views: 64

Re: Visualizing wave-particle duality

^^ "The wavelength of light is different from the wavelength of a photon/electron."

A wavelength of light is different from the wavelength of an electron, but not a photon. A photon is essentially light
by Deana Moghaddas 3E
Thu Oct 10, 2019 11:47 am
Forum: Limiting Reactant Calculations
Topic: Actual Yield
Replies: 6
Views: 180

Re: Actual Yield

actual yield will always be based on what the experiment produces when its executed in real life so yeah you won't have to calculate it
by Deana Moghaddas 3E
Fri Oct 04, 2019 3:25 pm
Forum: Balancing Chemical Reactions
Topic: Strategies for Balancing Chemical Equations
Replies: 12
Views: 123

Re: Strategies for Balancing Chemical Equations

start with the element that exists only once on either side of the equation. For example: CO2 + CNO3 -->> N2 + CO2 + CO3 I know that's a weird equation that probably wouldn't exist in real life, but the element that exists only once will be easiest to track at the start and will make it easier to ba...
by Deana Moghaddas 3E
Fri Oct 04, 2019 3:22 pm
Forum: Empirical & Molecular Formulas
Topic: Difference between empirical and molecular formulas
Replies: 6
Views: 109

Re: Difference between empirical and molecular formulas

E (empirical) comes before M (molecular) in the alphabet. Empirical formulas are the basis of molecular formulas and come before molecular formulas, just as E comes before M.
by Deana Moghaddas 3E
Fri Oct 04, 2019 3:20 pm
Forum: Molarity, Solutions, Dilutions
Topic: G 7 problem
Replies: 2
Views: 75

Re: G 7 problem

As a start for reference, remember that 1ml of water = 1g. Because this is an aqueous solution, you'll be using that conversion. 1) 5.24% of 510g will give you the amount of KNO3 you need. Answer is 26.724 g. 2) Subtract 26.724 from 510g to get the # grams of water you need to reach 510g. 3) Convert...
by Deana Moghaddas 3E
Fri Oct 04, 2019 3:13 pm
Forum: Properties of Light
Topic: c = fλ
Replies: 9
Views: 92

Re: c = fλ

the speed of light is always constant. light moves at the same speed no matter what
by Deana Moghaddas 3E
Fri Oct 04, 2019 3:12 pm
Forum: Properties of Light
Topic: unit change
Replies: 4
Views: 69

Re: unit change

Hz is essentially just a label for /s. When saying 25 Hz, we mean 25 cycles per second. They mean the same thing
by Deana Moghaddas 3E
Fri Oct 04, 2019 3:07 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy v Precision
Replies: 11
Views: 149

Re: Accuracy v Precision

accuracy = how close you are
precision = how consistent you are with your technique

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