Search found 51 matches
- Sat Dec 07, 2019 4:25 pm
- Forum: General Science Questions
- Topic: Final exam
- Replies: 3
- Views: 282
Final exam
What are the past averages on Lavelle's final exams?? I am freaking out
- Wed Dec 04, 2019 1:41 am
- Forum: Lewis Acids & Bases
- Topic: Examples of acids
- Replies: 1
- Views: 43
Examples of acids
How is an orange a stronger acid than vinegar?
- Wed Dec 04, 2019 1:39 am
- Forum: General Science Questions
- Topic: Aqueous
- Replies: 3
- Views: 248
Aqueous
Why does aqueous matter and are we going to need to know it for the final exam?
- Wed Dec 04, 2019 1:36 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal charge for H20+HCl-->H30++Cl-(aq)
- Replies: 1
- Views: 124
Formal charge for H20+HCl-->H30++Cl-(aq)
How do we calculate the formal charge for cation and anion?
- Wed Dec 04, 2019 1:24 am
- Forum: Lewis Acids & Bases
- Topic: Strong Acids
- Replies: 6
- Views: 124
Strong Acids
What makes something a strong acid?
- Wed Dec 04, 2019 1:23 am
- Forum: General Science Questions
- Topic: Practice with pH calculations
- Replies: 1
- Views: 106
Practice with pH calculations
What's the pH of [H+]=10^-5? What are the steps to finding the pH?
- Mon Dec 02, 2019 1:08 am
- Forum: Administrative Questions and Class Announcements
- Topic: Curving in Chem 14A
- Replies: 7
- Views: 282
Curving in Chem 14A
Does Professor Lavelle curve any exams or the final grade?
- Mon Dec 02, 2019 1:06 am
- Forum: Administrative Questions and Class Announcements
- Topic: Retaking Chem 14A
- Replies: 2
- Views: 81
Retaking Chem 14A
I'm scared that my final grade won't be as high as I would like it to be so I was wondering if I should retake chem 14A next quarter?
- Mon Dec 02, 2019 1:04 am
- Forum: Administrative Questions and Class Announcements
- Topic: Calculators on Final
- Replies: 6
- Views: 125
Calculators on Final
Do any of you know if calculators will be allowed on the final exam? On test 2 we couldn't use calculators so that's why I'm asking.
- Mon Dec 02, 2019 1:03 am
- Forum: Administrative Questions and Class Announcements
- Topic: Lavelle review sessions
- Replies: 3
- Views: 85
Lavelle review sessions
Will professor Lavelle be hosting any study sessions? I know he has UA's who do some but will THE Laurence Lavelle be hosting any?
- Mon Dec 02, 2019 1:01 am
- Forum: Administrative Questions and Class Announcements
- Topic: Final tips
- Replies: 19
- Views: 389
Final tips
Hello I wanted to know if there will be any study tips you guys have that I could use for the final? Thank you very much.
- Sun Nov 24, 2019 11:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular shape and central atom
- Replies: 3
- Views: 75
Molecular shape and central atom
What is the molecular shape if the central atom is found in group 12?
- Sun Nov 24, 2019 11:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular shape of carbon Dioxide
- Replies: 10
- Views: 163
Molecular shape of carbon Dioxide
What is the molecular shape off carbon dioxide?
- Sun Nov 24, 2019 11:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: electron and molecular geometry of H20
- Replies: 3
- Views: 66
electron and molecular geometry of H20
Can you verify the electron and molecular geometry of H20?
- Sun Nov 24, 2019 11:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Methanol's shape
- Replies: 1
- Views: 69
Methanol's shape
what is methanol's shape?
- Sun Nov 24, 2019 11:46 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Electron pair geometry
- Replies: 1
- Views: 52
Electron pair geometry
what is the electron pair geometry of NCL2?
- Sun Nov 17, 2019 3:02 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR shape clarification
- Replies: 2
- Views: 35
VSEPR shape clarification
Why are VSEPR molecular geometries and bond angles based on the lone pairs and bonded atoms?
- Sun Nov 17, 2019 3:00 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Linear Molecular Shape
- Replies: 1
- Views: 26
Linear Molecular Shape
Can someone please give me an example of a Linear Molecular Shape and how did you find that example?
- Sun Nov 17, 2019 2:58 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR shape question
- Replies: 2
- Views: 20
VSEPR shape question
What VSEPR shape has 2 bonding pairs and 0 lone pairs?
- Sun Nov 17, 2019 2:56 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Different type of Molecular Shapes
- Replies: 2
- Views: 27
Different type of Molecular Shapes
What is the difference between Linear, Trigonal Planar, and bent?
- Sun Nov 17, 2019 2:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSERP Theory
- Replies: 1
- Views: 19
VSERP Theory
How do you find the bond present in Sulfur Dioxide?
- Mon Nov 11, 2019 12:06 am
- Forum: Electronegativity
- Topic: Electronegativity between Oxygen and nitrogen
- Replies: 2
- Views: 54
Electronegativity between Oxygen and nitrogen
Why is oxygen more electronegative than nitrogen?
- Mon Nov 11, 2019 12:02 am
- Forum: Dipole Moments
- Topic: Dipole moment of ground state
- Replies: 1
- Views: 58
Dipole moment of ground state
How would we find the dipole moment of a ground state?
- Mon Nov 11, 2019 12:00 am
- Forum: Lewis Structures
- Topic: Polar and Non polar covalent bonds in lewis structures
- Replies: 5
- Views: 88
Polar and Non polar covalent bonds in lewis structures
Do we need to identify polar and non polar covalent bonds in lewis structures?
- Sun Nov 10, 2019 11:53 pm
- Forum: Ionic & Covalent Bonds
- Topic: Water molecules and ionic substances
- Replies: 5
- Views: 126
Water molecules and ionic substances
what is the feature of water molecules that enables ionic substances to dissolve in water?
- Sun Nov 10, 2019 11:47 pm
- Forum: Sigma & Pi Bonds
- Topic: Chemical Bonds in chemistry
- Replies: 3
- Views: 73
Chemical Bonds in chemistry
What are the 3 major chemical bonds in chemistry and what do they do?
- Mon Nov 04, 2019 12:04 am
- Forum: Ionic & Covalent Bonds
- Topic: Melting points of ionic substances
- Replies: 1
- Views: 100
Melting points of ionic substances
What are the two factors that affect the melting points of ionic substances?
- Sun Nov 03, 2019 11:57 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Solids
- Replies: 2
- Views: 104
Ionic Solids
In an Ionic solid what is each electron localized around?
- Sun Nov 03, 2019 11:44 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic bonds being held together
- Replies: 3
- Views: 51
Ionic bonds being held together
What are two ions in an ionic bonds held together by?
- Sun Nov 03, 2019 11:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent Bonds and unpaired electrons
- Replies: 2
- Views: 51
Covalent Bonds and unpaired electrons
Why is it that the number of covalent bonds anatomical can form is the same as the number unpaired electrons in its valence shells?
- Sun Oct 27, 2019 11:05 pm
- Forum: Ionic & Covalent Bonds
- Topic: using the octet rule
- Replies: 2
- Views: 51
using the octet rule
Is there a specific rule to when to apply the octet rule? I know it can be applied to covalent bonds but my question here is if we can also apply them to ionic bonds.
- Sun Oct 27, 2019 11:03 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent bonds and cations
- Replies: 3
- Views: 50
Covalent bonds and cations
How does the fact that a non-metals. ionization energy level being too high affect its ability to form cations?
- Sun Oct 27, 2019 11:01 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Bonds confusion
- Replies: 7
- Views: 111
Ionic Bonds confusion
Can Ionic compounds transfer Dots (e-) from nonmetal to metal or can it only transfer it from metal to nonmetal?
- Sun Oct 27, 2019 11:00 pm
- Forum: Lewis Structures
- Topic: Lewis symbols
- Replies: 5
- Views: 101
Lewis symbols
I know one dot represents a single e- in orbital and two dots represents 2 paired e- in the same orbital but how many other dots are there?
- Sun Oct 27, 2019 10:55 pm
- Forum: Bond Lengths & Energies
- Topic: Chemical Bonds
- Replies: 4
- Views: 70
Chemical Bonds
What is the reason behind why chemical bonds form? I know it's because bond atoms have lower energy that separate atoms but that doesn't make sense to me.
- Sun Oct 20, 2019 4:53 pm
- Forum: Properties of Electrons
- Topic: Quantum numbers
- Replies: 4
- Views: 82
Quantum numbers
Why is it that no two electrons in the same atom have the same four quantum numbers?
- Sun Oct 20, 2019 4:51 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Wave functions
- Replies: 2
- Views: 43
Wave functions
Do we always have to use a wave function to describe an e- in an atom?
- Sun Oct 20, 2019 4:50 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Light photons
- Replies: 1
- Views: 44
Light photons
When light photons are scattered from e- why does the momentum and position of e- get affected?
- Sun Oct 20, 2019 4:44 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Matter and wavelike properties
- Replies: 3
- Views: 58
Matter and wavelike properties
Since all matter has wavelike properties why is it that it can only be noticed for moving objects with extremely small mass.
- Sun Oct 20, 2019 4:42 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Diffraction patterns
- Replies: 1
- Views: 51
Diffraction patterns
Where do diffraction patterns result from? Please explain in depth.
- Thu Oct 10, 2019 10:34 pm
- Forum: Properties of Light
- Topic: Quantum mechanics description of light
- Replies: 2
- Views: 50
Quantum mechanics description of light
Why does a shorter lambda light eject e- from the metal surface while a longer lambda light doesn't?
- Thu Oct 10, 2019 10:31 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect diagram
- Replies: 3
- Views: 125
Photoelectric Effect diagram
Why would the detector be the one to figure the speed of the electron? Why would it even want to find out the speed?
- Thu Oct 10, 2019 10:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Extra help
- Replies: 8
- Views: 200
Extra help
Hello I was wondering if there are any online resources that some of you can recommend to me that will help me with chemistry? thank you!
- Thu Oct 10, 2019 10:22 pm
- Forum: Properties of Light
- Topic: Direct and Indirect relationships
- Replies: 2
- Views: 47
Direct and Indirect relationships
How would we able to identify if two variables have a direct or indirect relationship? I'm very confused on this.
- Thu Oct 10, 2019 10:19 pm
- Forum: Properties of Light
- Topic: Relationship between lambda and nu
- Replies: 5
- Views: 131
Relationship between lambda and nu
What would the relationship be between Lambda and Nu? How would one affect the other? thank you so much!
- Thu Oct 10, 2019 10:17 pm
- Forum: Properties of Light
- Topic: Wavelength help
- Replies: 3
- Views: 48
Wavelength help
If the wavelength of a proton increases what would happen to the photons energy?
- Thu Oct 03, 2019 11:51 pm
- Forum: Limiting Reactant Calculations
- Topic: Percent or theoretical yield
- Replies: 14
- Views: 801
Percent or theoretical yield
Hello everyone. I had a quick question on whether or not there is a difference between percent yield and theoretical yield. I have seen both be used in chemistry problems and I was confused as to whether they are two completely different things. Thank you very much for the help!
- Thu Oct 03, 2019 11:46 pm
- Forum: Balancing Chemical Reactions
- Topic: homework question M15
- Replies: 4
- Views: 118
homework question M15
When we balance chemical equations how do we know when we are supposed to convert it to grams? If I don't do that what will happen, do you think I would get the question entirely wrong or would I get partial points? thank you very much!!
- Thu Oct 03, 2019 11:33 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: HW question G15a
- Replies: 1
- Views: 61
HW question G15a
Hello in part A it's asking to calculate Vi of NA2CO3 but the thing is how do we know which one is Vi or which one is Mi? Thank you!
- Thu Oct 03, 2019 11:31 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: HW question G11
- Replies: 3
- Views: 44
HW question G11
I don't understand why we need to isolate the liters of the solution. What would that accomplish?
- Thu Oct 03, 2019 8:55 pm
- Forum: Balancing Chemical Reactions
- Topic: HW question M15
- Replies: 2
- Views: 82
HW question M15
For part B of the problem it is asking "What mass of aluminum chloride can be produced by these reactants" and my chemistry tutor said we must use the limiting reactant to find the theoretical yield but I don't know why we can't use the excess reactant to find the yield.