## Search found 87 matches

Sun Jan 17, 2021 6:40 pm
Forum: Ideal Gases
Topic: Sapling Question #4
Replies: 11
Views: 70

### Re: Sapling Question #4

If someone could help me with this one I would be so appreciative! I have tried so many times and can't figure out what I am doing wrong so if you could use my numbers that would be great!!
Mon Jan 11, 2021 1:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Le Chatelier's principle on Midterm
Replies: 9
Views: 44

### Re: Le Chatelier's principle on Midterm

I think Le CHatelier's principle would be one you would need to memorize for the midterm. Similar to how we had to remember Pauli Exclusion and Hund's rule ect.
Mon Jan 11, 2021 1:26 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sampling hw #2
Replies: 6
Views: 32

### Re: Sampling hw #2

As explained above, the chart with initial concentration, change in concentration, and equilibrium concentration is very helpful for this problem
Mon Jan 11, 2021 1:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling #4
Replies: 7
Views: 64

### Re: Sapling #4

Yes that would be the equation. It would be helpful for this question to set up the table to determine the values in terms of x and then can use the quadratic formula to solve for x
Mon Jan 04, 2021 2:10 pm
Forum: Ideal Gases
Topic: Converting concentration to partial pressure [ENDORSED]
Replies: 3
Views: 48

### Converting concentration to partial pressure[ENDORSED]

Can someone explain to me how you would be able to figure out the partial pressure of a gas if you are not given the temperature?
Sat Dec 12, 2020 10:16 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 3
Views: 42

### Re: Photoelectric Effect

To begin, you would need to use the wavelength given (converted to meters) to find the velocity of the ejected electron. The equation for this would be deBroglie's so wavelength=planks constant/(mass)(velocity) Once you have the velocity of the electron, you can use 1/2mv^2 to find the Kinetic energ...
Sun Dec 06, 2020 11:50 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number Question
Replies: 12
Views: 119

### Re: Coordination Number Question

Coordination number is the number of bonds but you must keep in mind that some ligands are bidentate/tridentate/tetradentate ect and would contribute 2 or more bonds. These additional bonds must be taken into account to find the correct coordination number.
Sun Dec 06, 2020 11:47 am
Forum: Naming
Topic: Naming H2O
Replies: 11
Views: 84

### Re: Naming H2O

It does not matter really how you write it. I remember in lecture that Lavelle wrote it as OH2 to show that the oxygen was what was donating the electrons rather than the Hydrogen
Sun Dec 06, 2020 11:45 am
Forum: Student Social/Study Group
Topic: Studying for Final Exam
Replies: 57
Views: 357

### Re: Studying for Final Exam

I am starting by doing 10 problems from each section on the outlines and then checking them and the sections where I struggled I will go back and re-read the textbook section and try more problems.
Sun Dec 06, 2020 11:43 am
Forum: Resonance Structures
Topic: Stability
Replies: 13
Views: 104

### Re: Stability

Resonance structures are determined to be more stable because they represent delocalized electrons and the fact that they can be found in multiple places. In general delocalized electrons are spread out over the molecule which makes it more stable than if it was fixed location.
Sun Dec 06, 2020 11:41 am
Forum: Hybridization
Topic: How to simply determine hybridization
Replies: 27
Views: 185

### Re: How to simply determine hybridization

I think of hybridization in terms of the electron configuration where the hybridization orbitals are the combination of the orbitals with electrons in them
Sun Dec 06, 2020 11:39 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Flashcards
Replies: 8
Views: 63

### Re: Flashcards

I find flashcards very helpful for this class in general. I have the name of a compound on one side and the lewis structure and properties on the other and write down what I think the answer is on a piece of paper and then check it with the back after.
Sun Dec 06, 2020 11:37 am
Forum: Lewis Acids & Bases
Topic: Lewis Acids & Bases
Replies: 12
Views: 88

### Re: Lewis Acids & Bases

I think the way that it is most similar to high school chemistry is in the fact that a lewis acid is electron-deficient and the lewis base is electron-rich and the electron-rich donates to the electron-deficient.
Sun Dec 06, 2020 11:35 am
Forum: Amphoteric Compounds
Topic: Amphoteric
Replies: 11
Views: 207

### Re: Amphoteric

An amphoteric substance is one that is able to react as both an acid and a base. Amphiprotic is a substance that could accept or donate H+ ions.
Sun Dec 06, 2020 11:32 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: ligands
Replies: 11
Views: 85

### Re: ligands

NH3 is neutral because the N has a charge of -3 and each H has a charge of +1 creating an overall charge of 0 for the compound.
Sun Dec 06, 2020 11:30 am
Forum: General Science Questions
Topic: State of a molecule
Replies: 6
Views: 59

### Re: State of a molecule

I do not think any questions would be asked in this class about what state of matter an atom or molecule would be in. Other than knowing that metals are solid and the obvious gasses, you should be solid
Sun Dec 06, 2020 11:26 am
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 21
Views: 135

### Re: Final

Yes in Lavelle's reviews he should talk about the format and details for the final but it should be the same format and set up as the midterms.
Sun Dec 06, 2020 11:25 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Sapling Week 9 #4
Replies: 5
Views: 44

### Re: Sapling Week 9 #4

I believe it is the case that a ligand is a lewis base but all lewis bases are not ligands. A ligand is specifically the lewis base as part of a coordination compound.
Sun Dec 06, 2020 11:22 am
Forum: Biological Examples
Topic: Hemoglobin vs. Myoglobin
Replies: 29
Views: 221

### Re: Hemoglobin vs. Myoglobin

Myoglobin is found in the tissues of the body while hemoglobin is found in the blood. They both serve the same purpose of transporting oxygen around the body but hemoglobin carried 4 times the amount of oxygen as myoglobin
Sun Dec 06, 2020 11:21 am
Forum: Resonance Structures
Topic: Valence Electrons [ENDORSED]
Replies: 43
Views: 256

### Re: Valence Electrons[ENDORSED]

For the s and p orbitals, you can use the group number to tell you how many valence electrons an element has, and for the d block, you can think about writing the halogen electron configuration and see how many electrons are written
Sun Dec 06, 2020 11:18 am
Forum: Naming
Replies: 22
Views: 123

### Re: Helpful Videos for Naming

This is so helpful. I was struggling with naming a lot and these videos helped me out a ton.
Sun Dec 06, 2020 11:16 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordinate Covalent Bond
Replies: 6
Views: 59

### Re: Coordinate Covalent Bond

As stated, a coordination covalent bond connects a ligand to a transition metal ion. The ligand contributes both electrons to the transition metal which is why it is a coordination covalent bond.
Sun Dec 06, 2020 11:15 am
Forum: Determining Molecular Shape (VSEPR)
Topic: linear same atoms?
Replies: 6
Views: 48

### Re: linear same atoms?

I believe the fact that they are the same atom does not make a difference in this case. You have to take into account the bound atoms and lone pairs to determine the geometry
Sun Dec 06, 2020 11:13 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Structure Names
Replies: 5
Views: 56

### Re: Structure Names

The reason that a molecule with 6 electron regions has an octahedral geometry is that the shape that is made in which the atoms would be the most stable is called an octahedron. This shape has 6 vertices which would represent the positions of the 6 electron regions. As for trigonal bipyramidal, a mo...
Sun Dec 06, 2020 11:05 am
Forum: Amphoteric Compounds
Topic: Memorization?
Replies: 10
Views: 201

### Re: Memorization?

I think it is very helpful to know them and have them memorized.
Sun Dec 06, 2020 11:05 am
Forum: Student Social/Study Group
Topic: How are you?
Replies: 111
Views: 754

### Re: How are you?

I am doing pretty well. Finals feel more stressful this quarter than usual for some reason.
Sun Dec 06, 2020 11:03 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Memorizing the name of complex ligands
Replies: 6
Views: 48

### Re: Memorizing the name of complex ligands

Hi I was wondering if anyone could explain to me how you would go about naming [Co (NH3)3Cl3]
I thought it would be triamminetrichlorocobalt(II)
Tue Dec 01, 2020 7:07 pm
Forum: Hybridization
Topic: Textbook Q 2F #7
Replies: 4
Views: 53

### Re: Textbook Q 2F #7

Hey! So AsF3 has a tetrahedral arrangement but a pyramidal shape due to the fourth electron region being a lone pair rather than an atom. The tetrahedral arrangement means that there is a hybridization of the one S and three P orbitals which is why it is sp3. You can also think of it as s + p*p*p.
Tue Dec 01, 2020 6:58 pm
Forum: Lewis Acids & Bases
Topic: Lewis Acids and Bases
Replies: 3
Views: 42

### Lewis Acids and Bases

Hi can someone explain to me what it means that the acid donates protons to the base?
Tue Dec 01, 2020 6:54 pm
Forum: Student Social/Study Group
Topic: Final Exam Study Tips
Replies: 48
Views: 244

### Re: Final Exam Study Tips

I have also used organic chem tutor on youtube! I found that really helpful.
Tue Dec 01, 2020 6:52 pm
Forum: Administrative Questions and Class Announcements
Topic: fall 2020 final
Replies: 17
Views: 181

### Re: fall 2020 final

He has not said how the final will be proctored. I assume it will be similar to the earlier midterms and I believe it is in the same multiple-choice format as the midterms.
Tue Dec 01, 2020 6:50 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Sapling Number 3
Replies: 8
Views: 60

### Re: Sapling Number 3

As the person above said, you would be correct that seesaw geometry has four bonds and thus a coordination number of 4, it is not the most common geometry for molecules with four bonds.
Tue Dec 01, 2020 6:46 pm
Forum: Lewis Structures
Topic: Octet rule
Replies: 12
Views: 114

### Re: Octet rule

The exceptions for the octet rule include examples such as SF6 where Sulfur can accommodate more than 8 valence electrons and BCl3 where Boron has less than 8 electrons in its valence shell.
Tue Nov 24, 2020 6:39 pm
Forum: Administrative Questions and Class Announcements
Replies: 4
Views: 43

No an A+ and A have the same GPA
Tue Nov 24, 2020 4:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Scores
Replies: 9
Views: 95

### Re: Midterm 2 Scores

Does anyone know if there is any way to review the ones you missed on midterm 2?
Sun Nov 08, 2020 11:51 pm
Forum: Student Social/Study Group
Topic: Post Midterm Blues
Replies: 71
Views: 608

### Re: Post Midterm Blues

Don’t stress too much! The chemistry community points along with the homework make up a good portion of the grade and you can do better on the next tests!!
Sun Nov 08, 2020 11:48 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Importance of anions and cations
Replies: 15
Views: 87

### Re: Importance of anions and cations

Anions are just atoms that gain electrons or become more negative to be in a more stable state. cations are similar except for they lose electrons or become more positive to reach a more stable state.
Sun Nov 08, 2020 11:46 pm
Forum: Resonance Structures
Topic: Valence Electrons [ENDORSED]
Replies: 43
Views: 256

### Re: Valence Electrons[ENDORSED]

The number of valence electrons is found by going across the period of the element and counting how many. So carbon would be 4, oxygen 6 etc.
Sun Nov 08, 2020 11:45 pm
Forum: Student Social/Study Group
Topic: Midterm 2
Replies: 28
Views: 170

### Re: Midterm 2

I found the text book problems, step up sessions, and workshops so helpful because you get to see most of the types of questions that will be asked on the midterm.
Sun Nov 01, 2020 2:50 pm
Forum: Photoelectric Effect
Topic: Sapling Problem #6
Replies: 7
Views: 122

### Re: Sapling Problem #6

Yes, the number of spectral lines is equal to the number of possible transitions from n=7 to n=1. To find the wavelength range you just have to find the wavelength corresponding to the transition from n=7 to n=6 and the wavelength corresponding to the transition from n=7 to n=1. These would be the m...
Sun Nov 01, 2020 2:47 pm
Forum: Photoelectric Effect
Topic: Sapling HW #11
Replies: 5
Views: 55

### Re: Sapling HW #11

To solve this, make sure you remember to convert nanometers to m in order to do the proper calculations. To find the frequency from the wavelength you would first use c= frequency/wavelength. Once you have the frequency, you plug it into the equation f= (Rydberg's constant) (1/n(final) - 1/n(initial...
Sun Nov 01, 2020 2:40 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: The orbitals
Replies: 8
Views: 67

### Re: The orbitals

I think there is a lot of information we will need to know requiring the orbitals. Mainly, it is important to be able to identify an atom from its ground-state electron configuration, (which is where the 2s and 3s come from). The periodic table is separated into blocks, corresponding to the type of ...
Sun Nov 01, 2020 2:15 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Equations Coefficient Question
Replies: 15
Views: 108

### Re: Balancing Equations Coefficient Question

Yes, you have the right idea about it. since you do not want a coefficient to be 15/2 you have to multiply every coefficient by 2 so they are all in whole numbers and maintain the correct ratio
Sun Nov 01, 2020 2:08 pm
Forum: Properties of Electrons
Topic: Sapling HW #1
Replies: 6
Views: 51

### Re: Sapling HW #1

As they stated above, the wavelength and frequency do not change based on the number of photons. The value you get for energy is per photon so you must only multiply this value by 100 to get the total energy.
Sun Oct 18, 2020 6:22 pm
Forum: Student Social/Study Group
Topic: Midterm - extra review
Replies: 3
Views: 45

### Re: Midterm - extra review

hey again kendall!! still missing you! Wish we were back in class with sam and brandee! I would love to do some midterm review over zoom with you! Text me and let me know when works best!
Sun Oct 18, 2020 6:18 pm
Forum: Student Social/Study Group
Topic: Discussion 2D GroupMe
Replies: 4
Views: 32

### Re: Discussion 2D GroupMe

Hey Kendall! Miss you from last year's ls7b class! Do you know if the first midterm will cover weeks 1-3 only or if the beginning of week 4 is included?
Sun Oct 18, 2020 4:09 pm
Forum: Properties of Electrons
Topic: protons and electrons
Replies: 33
Views: 191

### Re: protons and electrons

Protons and neutrons have around the same mass of about 1.67 x 10^-24 grams while electrons are only 9.109 x 10^-28g. Protons and neutrons determine the mass of an atom, while electrons move from atom to atom without a significant change in mass
Sun Oct 18, 2020 4:03 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test Accuracy
Replies: 13
Views: 154

### Re: Test Accuracy

Although I believe for this quarter the exams are multiple-choice so it is not as important, usually, it is good to have your answers in 3 or 4 sig figs. Also, it does depend on the TA since they are grading but usually there is a range for the answers to account for rounding errors.
Sun Oct 18, 2020 3:58 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 8
Views: 46

### Re: Study Tips

I think the problems on the audiovisual topics are the most helpful for studying. It is helpful to see many different problems for each topic so you will be prepared for the kinds of questions being asked on the midterm. Also, of course, it is important to have a good background for what you are doi...
Sun Oct 18, 2020 3:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm monitoring
Replies: 4
Views: 20

### Re: Midterm monitoring

I am assuming we can be muted for the exam as I have two roommates who would be using the space I would be taking the exam. My TA said that they want to be monitoring your workspace rather than your face. He recommended getting a webcam that would attach to your computer.
Sun Oct 18, 2020 3:54 pm
Forum: Student Social/Study Group
Topic: Forming Virtual Study Group
Replies: 31
Views: 172

### Re: Forming Virtual Study Group

I would love to be part of the virtual study group my Instagram is _abbyhyman
Sun Oct 11, 2020 2:54 pm
Forum: Balancing Chemical Reactions
Topic: States of Molecules
Replies: 9
Views: 113

### Re: States of Molecules

The state of the molecule is not required for balancing equations right now. I believe Lavelle will discuss more of this later on in the quarter, but not something that is tested on I don't think.
Sun Oct 11, 2020 2:48 pm
Forum: SI Units, Unit Conversions
Topic: Conversion Factors
Replies: 6
Views: 35

### Re: Conversion Factors

Along with the conversion factor link on the website, I believe you are given some conversions on the formula sheet for tests.
Sun Oct 11, 2020 2:47 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 484

### Re: Periodic Table

I believe the periodic table is always provided to you if you need it for exams so memorizing would be unnecessary. It does save time to know the molar masses for some of the commonly used elements though, so you do not have to refer back every time.
Sun Oct 11, 2020 2:45 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular Formula
Replies: 3
Views: 37

### Re: Molecular Formula

Although the molecular formula is directly related to the molar mass of elements and the compound, there is not a common multiple that would take you from molar mass to molecular formula. If you meant how to get from empirical formula to molecular formula using the total molar mass, then you would a...
Sun Oct 11, 2020 2:39 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular Compound
Replies: 3
Views: 40

### Re: Molecular Compound

I believe for this class you just need to recognize the common ones but will not be asked to produce the name based on only the empirical formula.
Tue Nov 12, 2019 9:20 am
Forum: Lewis Structures
Topic: Center of a Lewis Structure
Replies: 7
Views: 117

### Re: Center of a Lewis Structure

I figure out which atom is the least electronegative which is often the one with the lowest ionization energy. Nitrogen and Oxygen are exceptions to this though
Tue Nov 12, 2019 9:19 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing Power
Replies: 6
Views: 141

### Re: Polarizing Power

Polarizability is how easily an electron cloud is distorted by an electric field. Polarizing power is a cations ability to attract valence electrons from a nearby anion in ionic compounds
Tue Nov 12, 2019 9:16 am
Forum: Sigma & Pi Bonds
Topic: Sigma & Pi Bonds
Replies: 5
Views: 104

### Re: Sigma & Pi Bonds

Sigma bonds are formed by end to end overlapping atomic orbitals. Pi bonds are when the lobe of one atomic orbital overlaps with another.
Tue Nov 12, 2019 9:14 am
Forum: Dipole Moments
Topic: 3F.11
Replies: 3
Views: 52

### Re: 3F.11

I agree with this. hydrogen bonds form only when hydrogen bonds with nitrogen oxygen or florine so D would be the only one that forms a hydrogen bond.
Tue Nov 12, 2019 9:12 am
Forum: Administrative Questions and Class Announcements
Topic: Test #2
Replies: 22
Views: 2252

### Re: Test #2

I also am wondering. My TA said that they have not written yet so do not know...
Sun Nov 03, 2019 11:55 pm
Forum: Trends in The Periodic Table
Replies: 30
Views: 405

Atomic radius increases as you move from the top right corner of the periodic table to the bottom left. As you add more electrons the radius increases until a new shell is added when you move down to the next period
Sun Nov 03, 2019 11:50 pm
Forum: Properties of Electrons
Topic: Rydberg Constant
Replies: 2
Views: 142

### Re: Rydberg Constant

The Rydberg formula is a mathematical formula used to predict the wavelength of light resulting from an electron moving between energy levels of an atom.
Sun Nov 03, 2019 11:46 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent
Replies: 14
Views: 261

### Re: Ionic vs Covalent

The difference between ionic and covalent bonds are the type of element involved in the reaction. Ionic bonds are between a metal and a nonmetal while covalent bonds are between two non-metals.
Sun Nov 03, 2019 11:45 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 58
Views: 2341

### Re: Study Tips

The online modules and assessments are so helpful for this class you can really see if you understand the material. I have found youtube videos helpful as well for more knowledge on sections I do not understand.
Sun Nov 03, 2019 11:42 pm
Forum: Photoelectric Effect
Topic: Best way to study for this topic?
Replies: 8
Views: 278

### Re: Best way to study for this topic?

The pre and post assessments on the class website are very helpful for studying as well as the module videos.
Sun Oct 27, 2019 10:11 pm
Forum: Ionic & Covalent Bonds
Topic: Metals Vs. Nonmetals
Replies: 8
Views: 212

### Re: Metals Vs. Nonmetals

Nonmetals do not form cations because their ionization energy is too high, they share electrons to form covalent bonds
Sun Oct 27, 2019 10:10 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge purpose
Replies: 40
Views: 4486

### Re: Formal charge purpose

Formal charge indicates the gain or loss of electrons while forming covalent bonds. Used to find which is the most stable
Sun Oct 27, 2019 10:08 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic v. Covalent
Replies: 7
Views: 83

### Re: Ionic v. Covalent

ionic bonds are between a metal and a non-metal and covalent are between two non-metals
Sun Oct 27, 2019 10:04 pm
Forum: Ionic & Covalent Bonds
Topic: periodic table
Replies: 10
Views: 131

### Re: periodic table

electronegativity increases as you move left to right and decreases as you move down on the periodic table
Sun Oct 27, 2019 10:01 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 5440

### Re: Test 1[ENDORSED]

My TA said there will be material from test 1 on the midterm, but test 2 is from after the midterm to the test and then the final will be comprehensive from the first test on
Sun Oct 20, 2019 9:19 pm
Forum: Properties of Light
Topic: Midterm Exam
Replies: 21
Views: 268

### Re: Midterm Exam

Drake Choi_1I wrote:Is there going to be a curve for the midterm? Or is grade based on raw score?

No curve in the class so just your raw score from all assignments added up out of 500 I believe
Sun Oct 20, 2019 9:17 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 471

### Re: Unit for Wavelength

since wavelength is a measure of distance it is found in meters, pm, or nm
Sun Oct 20, 2019 9:15 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 1311

### Re: Best Way To Study?

When studying by doing practice problems from the textbook, how do you guys check if your answers are correct? For me many times I may think I got the correct answer when I really didn't. There is a solution manual for the textbook questions so you can check if you did the work correctly that way! ...
Sun Oct 20, 2019 9:13 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Incorrect atomic model example
Replies: 3
Views: 61

### Re: Incorrect atomic model example

The unrealistic answer tells us that the electrons cannot be located at the nucleus of the atom, because the value we used for the uncertainty in position for the calculation was the diameter of the hydrogen nucleus. This tells us that electrons cannot be located in the nucleus, and therefore are o...
Sun Oct 20, 2019 9:11 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Spin up and Spin down
Replies: 2
Views: 30

### Re: Spin up and Spin down

I am also very confused on this topic and how to tell if they are parallel or paired?
Sun Oct 13, 2019 12:39 pm
Forum: Photoelectric Effect
Topic: Proportional sign
Replies: 4
Views: 70

### Re: Proportional sign

Claire Grover 3G wrote:∝ is the sign! Basically instead of writing E = hv, you could write E ∝ v, which means that E is proportional to v (by a factor of h).

I agree with this. This shows that E and v are proportionate to each other.
Sun Oct 13, 2019 12:38 pm
Forum: Bond Lengths & Energies
Topic: Bond lengths
Replies: 15
Views: 232

### Re: Bond lengths

Wendy Perez 3A wrote:I believe that Dr. Lavelle mentioned this once in his lectures. A bond length between two molecules is about 10^-10m, which is equal to 1 Angstrom.

Yes, this is correct. A bond length is always equal to 1 angstrom
Sun Oct 13, 2019 12:34 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation
Replies: 9
Views: 141

### Re: DeBroglie Equation

Since you have to have a mass to find wavelength using DeBroglie's equation, it would be impossible for it to work for light because light has no mass.
Sun Oct 13, 2019 12:33 pm
Forum: Properties of Light
Topic: Large Objects
Replies: 7
Views: 107

### Re: Large Objects

I agree with the statements above. In De Broglie's formula, since you are dividing by mass to get wavelength, the inverse relationship would make the wavelength smaller as the object gets bigger in mass.
Sun Oct 13, 2019 12:26 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 68
Views: 4106

### Re: Showing Work for Limiting Reactant Calculations on Tests[ENDORSED]

My TA informed us on Monday that if we have the correct answer we get full credit, but if we don't have the correct answer we can get partial credit if the work we've shown is correct but a calculation was messed up
Thu Oct 03, 2019 5:25 pm
Forum: Significant Figures
Topic: sig figs in calculations
Replies: 4
Views: 87

### Re: sig figs in calculations

Thu Oct 03, 2019 5:22 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: States of Matter
Replies: 9
Views: 320

### Re: States of Matter

The states of matter do not matter when balancing a chemical equation
Thu Oct 03, 2019 5:20 pm
Forum: Empirical & Molecular Formulas
Topic: Calculating Empirical Formula with Given Amounts of Each Element
Replies: 7
Views: 91

### Re: Calculating Empirical Formula with Given Amounts of Each Element

Personally, I like using the 100 g method because if there is such a question that says " there is 40%C, 10%O, 20%H, and an unknown amount of a 4th element, it makes it way easier to go from there inorder to calculate the empirical formula. I agree with this, the 100 g method is the easiest be...
Thu Oct 03, 2019 5:07 pm
Forum: General Science Questions
Topic: Naming compounds
Replies: 6
Views: 122

### Re: Naming compounds

My TA said the same, the common ones that we've been using in class and such will be used but for the most part, we will be given them.
Thu Oct 03, 2019 5:05 pm
Forum: General Science Questions
Topic: Naming compounds
Replies: 6
Views: 122

### Re: Naming compounds

My TA said the same, the common ones that we've been using in class and such will be used but for the most part, we will be given them.
Thu Oct 03, 2019 5:00 pm
Forum: Limiting Reactant Calculations
Topic: Homework Week 1
Replies: 18
Views: 349

### Re: Homework Week 1

Johnathan Smith 1A wrote:Can someone clarify exactly what we are supposed to do for Homework? Are we doing five problems overall or five from each section?

For the homework, you only need to turn in five problems overall, the list of questions in the different sections is just the array of questions to choose from.