Search found 50 matches

by thanh24mai
Sun Dec 01, 2019 2:44 pm
Forum: Lewis Acids & Bases
Topic: transition metal is acid?
Replies: 2
Views: 12

Re: transition metal is acid?

How do you determine this?
by thanh24mai
Sun Dec 01, 2019 2:42 pm
Forum: Conjugate Acids & Bases
Topic: Water as an Acid/Base
Replies: 20
Views: 361

Re: Water as an Acid/Base

water can be both; it's amphoteric
by thanh24mai
Sun Dec 01, 2019 2:40 pm
Forum: Hybridization
Topic: Writing the hydrization
Replies: 10
Views: 59

Re: Writing the hydrization

Can you explain how to find the hybridization? I've always struggled with it
by thanh24mai
Sun Dec 01, 2019 2:38 pm
Forum: Naming
Topic: Final Exam?
Replies: 20
Views: 85

Final Exam?

Does anyone happen to have a list of topics we will be covering for the exam or is it cumulative? If it is cumulative, can we just base off what we need to know using the outlines?
by thanh24mai
Sun Dec 01, 2019 2:36 pm
Forum: *Stereochemistry
Topic: Isomer
Replies: 1
Views: 10

Isomer

What is a stereoisomer?
by thanh24mai
Thu Nov 28, 2019 11:03 pm
Forum: Hybridization
Topic: Sigma and Pi bonds
Replies: 7
Views: 48

Sigma and Pi bonds

Can someone explain sigma and pi bonds in relation to single, double and triple bonds ?
by thanh24mai
Thu Nov 28, 2019 10:58 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Final Exam
Replies: 10
Views: 55

Re: Final Exam

yeah it's cumulative
by thanh24mai
Thu Nov 28, 2019 10:57 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Inorganic vs organic
Replies: 5
Views: 19

Re: Inorganic vs organic

If it contains carbon it is organic !
by thanh24mai
Thu Nov 28, 2019 10:57 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Lewis Acid/Base
Replies: 5
Views: 21

Lewis Acid/Base

What's a lewis acid/base?
by thanh24mai
Thu Nov 28, 2019 10:56 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Bronsted Acid/Base
Replies: 4
Views: 13

Bronsted Acid/Base

What's a bronsted acid/base?
by thanh24mai
Mon Nov 18, 2019 1:11 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 3
Views: 19

Molecular Shape

Molecular shape can only be affected by lone pairs on the central atom, right? lone pairs on other atoms surrounding the central atom don't affect the shape?
by thanh24mai
Mon Nov 18, 2019 1:08 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Repulsion strength
Replies: 5
Views: 23

Re: Repulsion strength

closer!
by thanh24mai
Mon Nov 18, 2019 1:08 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 2
Views: 23

Re: VSEPR

valence shell electron pair repulsion
by thanh24mai
Mon Nov 18, 2019 1:07 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 9
Views: 35

Re: Bond Angles

I think just memorize the basic ones, but also understanding it conceptually on whether it will be greater than or less than the basic ones will help as well!
by thanh24mai
Mon Nov 18, 2019 1:06 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Test 2
Replies: 1
Views: 26

Test 2

Is the molecular orbital theory going to be on test 2?
by thanh24mai
Sun Nov 17, 2019 8:24 pm
Forum: Sigma & Pi Bonds
Topic: sigma and pi bonds
Replies: 4
Views: 17

sigma and pi bonds

what's the significance and difference between sigma and pi bonds?
by thanh24mai
Sun Nov 17, 2019 8:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond angle
Replies: 3
Views: 17

Bond angle

do we need to calculate specific bond angles or just know if its less than/greater than?
by thanh24mai
Sun Nov 17, 2019 8:21 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular shape
Replies: 3
Views: 16

Molecular shape

Is seasaw and sawhorse the same shape?
by thanh24mai
Sun Nov 17, 2019 8:21 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 19
Views: 108

Re: Test 2

do we need to know hybridization for the test?
by thanh24mai
Sun Nov 17, 2019 8:20 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar vs non polar
Replies: 5
Views: 25

Re: Polar vs non polar

no, it won't always be the case
by thanh24mai
Wed Nov 06, 2019 2:14 pm
Forum: Lewis Structures
Topic: Expanded Octets
Replies: 6
Views: 31

Re: Expanded Octets

You may sometimes need to expand an octet if you want to ensure you have drawn the most stable lewis structure.
by thanh24mai
Wed Nov 06, 2019 2:13 pm
Forum: Lewis Structures
Topic: Lewis structure for Nitrate
Replies: 4
Views: 38

Re: Lewis structure for Nitrate

Why can't we put formal charges on atoms with low electron affinity?
by thanh24mai
Wed Nov 06, 2019 2:09 pm
Forum: Lewis Structures
Topic: Lewis Structure
Replies: 4
Views: 23

Lewis Structure

Can someone just briefly review on how to know you've drawn the most stable Lewis structure?
by thanh24mai
Wed Nov 06, 2019 2:08 pm
Forum: Lewis Structures
Topic: Lewis acids vs Lewis bases
Replies: 3
Views: 26

Re: Lewis acids vs Lewis bases

The acid accepts an electron (to help remember I just remember they both start with an 'a') and that the base donates an electron!
by thanh24mai
Wed Nov 06, 2019 2:07 pm
Forum: Lewis Structures
Topic: When to draw Resonance Structures
Replies: 14
Views: 73

Re: When to draw Resonance Structures

I think to just be safe, draw the resonance structures unless he specifies to not do draw them.
by thanh24mai
Thu Oct 31, 2019 9:38 am
Forum: Ionic & Covalent Bonds
Topic: Format of midterm?
Replies: 12
Views: 61

Re: Format of midterm?

Are the questions going to be verbatim from the homework or do they just mean a similar format?
by thanh24mai
Thu Oct 31, 2019 9:36 am
Forum: Ionic & Covalent Bonds
Topic: Homework for Week 5
Replies: 8
Views: 50

Re: Homework for Week 5

yeah, i think homework should be done on bonding since that's the most recent !
by thanh24mai
Thu Oct 31, 2019 9:33 am
Forum: Ionic & Covalent Bonds
Topic: What is the Octet Rule?
Replies: 5
Views: 27

Re: What is the Octet Rule?

the octet rule just refers to how atoms prefer having eight electrons in their valence shells, which means their shell is completely full, making them very stable.
by thanh24mai
Thu Oct 31, 2019 9:29 am
Forum: Electronegativity
Topic: Radius
Replies: 13
Views: 409

Re: Radius

when electronegativity increases, it means that the pull on the electrons is greater making the electrons close to the nucleus. If it's closer to the nucleus its radius is going to be smaller
by thanh24mai
Thu Oct 31, 2019 9:26 am
Forum: Octet Exceptions
Topic: Octet Exception
Replies: 3
Views: 23

Octet Exception

Are we just supposed to memorize all the octet exceptions or is there a certain strategy that can be used?
by thanh24mai
Sun Oct 27, 2019 3:18 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons
Replies: 16
Views: 101

Valence Electrons

How do you count valence electrons?
by thanh24mai
Sun Oct 27, 2019 3:17 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 11
Views: 70

Covalent Bonds

Just making sure, covalent bonds can only be formed by nonmetals?
by thanh24mai
Sun Oct 27, 2019 3:14 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Number
Replies: 3
Views: 31

Quantum Number

How do you identify the spin projection quantum number?
by thanh24mai
Sun Oct 27, 2019 3:12 pm
Forum: Trends in The Periodic Table
Topic: Central Atom
Replies: 13
Views: 50

Central Atom

How do you know which to use as the central atom?
by thanh24mai
Sun Oct 27, 2019 3:12 pm
Forum: Trends in The Periodic Table
Topic: Ionization and Electron Affinity
Replies: 5
Views: 20

Ionization and Electron Affinity

What's the difference between ionization energy and electron affinity?
by thanh24mai
Tue Oct 15, 2019 4:20 pm
Forum: Properties of Light
Topic: Relationships
Replies: 2
Views: 21

Relationships

So just to clarify, wavelength and frequency are inversely proportional and energy and frequency are directly proportional? Is that right?
by thanh24mai
Tue Oct 15, 2019 4:17 pm
Forum: *Black Body Radiation
Topic: What is Black Body?
Replies: 6
Views: 53

Re: What is Black Body?

So I'm not super sure, but I remember in lecture he was saying that a black body is something that absorbs radiation at all wavelengths.
by thanh24mai
Tue Oct 15, 2019 4:15 pm
Forum: Photoelectric Effect
Topic: Speed of Light
Replies: 29
Views: 132

Speed of Light

Is the speed of light always going to be 2.998 x 10^8 m/s? Is this a constant?
by thanh24mai
Tue Oct 15, 2019 4:10 pm
Forum: Properties of Light
Topic: Question 1A.5
Replies: 4
Views: 35

Re: Question 1A.5

Yup! Just least amount of energy to greatest amount of energy!
by thanh24mai
Tue Oct 15, 2019 4:09 pm
Forum: Properties of Light
Topic: Wave Frequency
Replies: 9
Views: 58

Re: Wave Frequency

Frequency is the amount of energy per photon according to the wave model.
by thanh24mai
Wed Oct 09, 2019 11:25 pm
Forum: Photoelectric Effect
Topic: Difference between Photoelectric effect and the atomic spectra
Replies: 3
Views: 39

Re: Difference between Photoelectric effect and the atomic spectra

Thanks for asking/answering! I had the same question!
by thanh24mai
Wed Oct 09, 2019 11:24 pm
Forum: Photoelectric Effect
Topic: Work Function
Replies: 4
Views: 44

Work Function

Can someone explain what work function is? And is work function and the term threshold energy used interchangeably?
by thanh24mai
Wed Oct 09, 2019 11:17 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Formula Unit
Replies: 3
Views: 47

Re: Formula Unit

No, it just essentially means to use Avogadro's number in your calculations.
by thanh24mai
Wed Oct 09, 2019 11:16 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass
Replies: 7
Views: 73

Re: Molar Mass

the word molecule hints that you need to use Avogadro's number !
by thanh24mai
Wed Oct 09, 2019 11:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1418

Re: Week 2 Homework Problems [ENDORSED]

You can do problems from both the fundamentals or quantum section!
by thanh24mai
Sat Oct 05, 2019 8:27 pm
Forum: Balancing Chemical Reactions
Topic: When are atoms lost or created?
Replies: 14
Views: 149

Re: When are atoms lost or created?

the law of conservation of mass states that atoms actually cannot be lost or created in a reaction!
by thanh24mai
Sat Oct 05, 2019 8:26 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Theoretical vs. Actual Yield
Replies: 38
Views: 308

Re: Theoretical vs. Actual Yield

the actual yield will have to be less than the theoretical yield due to impurities and more that will occur in an actual reaction!
by thanh24mai
Fri Oct 04, 2019 2:17 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy v Precision
Replies: 11
Views: 84

Accuracy v Precision

Can someone please explain the difference between accuracy and precision? Thanks!
by thanh24mai
Fri Oct 04, 2019 2:05 pm
Forum: Limiting Reactant Calculations
Topic: Percent Yield
Replies: 6
Views: 31

Percent Yield

When calculating the percent yield, does the actual and theoretical yield have to be in grams or moles? Or can it be either?
by thanh24mai
Tue Oct 01, 2019 10:57 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical and Molecular Formulas [ENDORSED]
Replies: 5
Views: 63

Empirical and Molecular Formulas [ENDORSED]

Just to confirm, can the empirical formula and molecular formula be the same?

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