Search found 31 matches

by Chetas Holagunda 3H
Fri Nov 08, 2019 1:21 pm
Forum: Dipole Moments
Topic: Dipole moments
Replies: 5
Views: 36

Re: Dipole moments

Also, as the difference in electronegativity increases, the magnitude of the partial charges also increase, affecting the dipole moment.
by Chetas Holagunda 3H
Fri Nov 08, 2019 1:19 pm
Forum: Electronegativity
Topic: Electronegativity Chart
Replies: 5
Views: 37

Re: Electronegativity Chart

Adding on, I think it would also be helpful to just know which elements are generally a lot more electronegative and the electronegativity values of the most electronegative elements like F, N, O, and Cl.
by Chetas Holagunda 3H
Fri Nov 08, 2019 1:17 pm
Forum: Bond Lengths & Energies
Topic: Bond strengths
Replies: 9
Views: 31

Re: Bond strengths

Usually if a bond is shorter, it's because there are more electrons involved and the pull is greater, therefore decreasing the length of the bond. This makes the shorter bonds stronger.
by Chetas Holagunda 3H
Fri Nov 08, 2019 1:15 pm
Forum: Bond Lengths & Energies
Topic: dissociation energy
Replies: 6
Views: 25

Re: dissociation energy

As the number of bonds increases too, like from a single, to double, to triple, the dissociation energy increases as the strength of the bond is more.
by Chetas Holagunda 3H
Fri Nov 08, 2019 1:14 pm
Forum: Bond Lengths & Energies
Topic: Midterm
Replies: 9
Views: 82

Re: Midterm

The midterm will be graded by Wednesday of next week.
by Chetas Holagunda 3H
Sun Nov 03, 2019 1:28 pm
Forum: Resonance Structures
Topic: Drawing Resonance Structures
Replies: 4
Views: 25

Re: Drawing Resonance Structures

Unless they specify to draw all forms of the resonance structure, I don't think that we have to but yes I believe the only way for now is to just redraw the bonds in different locations.
by Chetas Holagunda 3H
Sun Nov 03, 2019 1:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011361

Re: Post All Chemistry Jokes Here

How often do I tell chemistry jokes?

Periodically.
by Chetas Holagunda 3H
Sun Nov 03, 2019 1:16 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Purpose
Replies: 4
Views: 26

Re: Formal Charge Purpose

Yes. The lower the magnitude of the total formal charge, the more stable that structure is for the compound. Also, allowing the more electronegative atoms to have the lower formal charge makes it more stable.
by Chetas Holagunda 3H
Sun Nov 03, 2019 1:15 pm
Forum: Ionic & Covalent Bonds
Topic: ionic bonds
Replies: 4
Views: 25

Re: ionic bonds

Compounds that have ionic bonds dissolve and dissociate in water. Also, one could look at the charges of each atom based on the periodic table and determine it that way if one atom is negative and the other is positively charged.
by Chetas Holagunda 3H
Sun Nov 03, 2019 1:10 pm
Forum: Lewis Structures
Topic: Bonds
Replies: 4
Views: 16

Re: Bonds

The type of bond depends on the formal charge of each of the elements in the compound. The goal is to get the least magnitude of formal charges.
by Chetas Holagunda 3H
Wed Oct 23, 2019 1:07 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Subshell vs. Orbital
Replies: 9
Views: 47

Re: Subshell vs. Orbital

An orbital is a subsection under a subshell. A subshell is recognized based off of the l value: 0=s, 1=p, etc. Then within these, each sub shell has certain orbitals with s having 1, p having 3, d having 5, and f having 7, where each orbital has 2 electrons paired based on their spin state.
by Chetas Holagunda 3H
Wed Oct 23, 2019 1:01 am
Forum: *Particle in a Box
Topic: Explaining Particle in a Box
Replies: 4
Views: 49

Re: Explaining Particle in a Box

The particle in a box is also used to help us visualize how the particle could move and what its limitations are.
by Chetas Holagunda 3H
Wed Oct 23, 2019 12:59 am
Forum: Photoelectric Effect
Topic: Work Function?
Replies: 7
Views: 36

Re: Work Function?

Work function, also symbolized as phi in equations, is the minimum amount of energy needed from a photon to remove an electron from a metal surface. Each metal has a different work function. If the energy of a photon is more, then the electron will have kinetic energy which can be calculated with .5...
by Chetas Holagunda 3H
Wed Oct 23, 2019 12:57 am
Forum: Einstein Equation
Topic: energy emitted by H electrons
Replies: 5
Views: 60

Re: energy emitted by H electrons

Adding on, this difference in energy of a transitioning hydrogen atom could be used to calculate the energy of the emitted photon by the release of energy in the excited hydrogen atom.
by Chetas Holagunda 3H
Wed Oct 23, 2019 12:48 am
Forum: DeBroglie Equation
Topic: When to combine equations
Replies: 10
Views: 53

Re: When to combine equations

If the question is asking for a value that isn't part of an equation, you can combine two of the equations with the help of a common factor to solve for the final variable. Like you said, this was done in the De Broglie's equation.
by Chetas Holagunda 3H
Wed Oct 16, 2019 11:39 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011361

Re: Post All Chemistry Jokes Here

What emotional disorder does a gas chromatograph suffer from?

Separation Anxiety!
by Chetas Holagunda 3H
Wed Oct 16, 2019 11:30 am
Forum: Properties of Electrons
Topic: Photons
Replies: 9
Views: 57

Re: Photons

In response to Jorge's question, if a photon has enough energy within it, it can interact with an electron which is on its path and then displace its position. It can affect its velocity because if the electron is put on a different trajectory, its distance it travels is changed, causing the velocit...
by Chetas Holagunda 3H
Wed Oct 16, 2019 11:25 am
Forum: Properties of Electrons
Topic: Equations and confused of when to use what
Replies: 3
Views: 24

Re: Equations and confused of when to use what

If some equations have variables in similar, like frequency, they can be substituted into each other to solve for the problem if the other variables in a certain formula aren't provided.
by Chetas Holagunda 3H
Wed Oct 16, 2019 11:19 am
Forum: Properties of Electrons
Topic: electron mass
Replies: 8
Views: 48

Re: electron mass

Just to be safe, I would also memorize it as it saves time while doing calculations on the test.
by Chetas Holagunda 3H
Wed Oct 16, 2019 11:17 am
Forum: Properties of Electrons
Topic: electrons ejected [ENDORSED]
Replies: 3
Views: 20

Re: electrons ejected [ENDORSED]

Adding on, if the energy of the photon is more, that means the electron is ejected has more energy in the form of kinetic energy. This kinetic energy of the displaced electron can be calculated by E(photon) - E(threshold of electron) = kinetic energy.
by Chetas Holagunda 3H
Sun Oct 13, 2019 8:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011361

Re: Post All Chemistry Jokes Here

What's the dullest element?

Bohrium
by Chetas Holagunda 3H
Sat Oct 12, 2019 1:36 pm
Forum: Significant Figures
Topic: Significant Figures and Molar Masses
Replies: 5
Views: 40

Re: Significant Figures and Molar Masses

When calculating, the constant values given should not be considered in terms of rounding for significant figures. The given values of a substance in the question with the least significant figures is what should be taken into consideration for rounding. The rest of the calculation should be done wi...
by Chetas Holagunda 3H
Sat Oct 12, 2019 1:33 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 66
Views: 848

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

Showing your work in terms of dimensional analysis also makes it clearer in terms of what factor you need to divide or multiply by.
by Chetas Holagunda 3H
Wed Oct 09, 2019 11:15 am
Forum: Photoelectric Effect
Topic: Quantum
Replies: 5
Views: 46

Re: Quantum

They have to be in integer values like n=1,2,3 and it means that it is the smallest transferrable unit I think.
by Chetas Holagunda 3H
Wed Oct 09, 2019 11:09 am
Forum: Properties of Electrons
Topic: Kinetic Energy
Replies: 4
Views: 43

Re: Kinetic Energy

I would think that as you increase the intensity or frequency, more energy would be given off by the photon, surpassing the threshold energy. Since the energy needs to be conserved, the velocity of the electron would be greater as the energy given by the photon increases since kinetic energy's varia...
by Chetas Holagunda 3H
Wed Oct 09, 2019 10:49 am
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 61
Views: 18348

Re: Final Jitters

I would recommend going over problems that have gave you some difficulty and try to understand why those steps are being done. This will let yourself know that you not only know how to solve it, but also why. I would also recommend taking some time off from the books and trying to do something else ...
by Chetas Holagunda 3H
Mon Sep 30, 2019 10:34 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011361

Re: Post All Chemistry Jokes Here

Why do chemists find working with ammonia easy?

It's pretty basic stuff.
by Chetas Holagunda 3H
Mon Sep 30, 2019 10:26 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's Number
Replies: 4
Views: 42

Re: Avogadro's Number

I have even seen it as 6.023X10^23 in other books but I'd say to stick with what Dr. Lavelle is using since it has been working with the class examples and the homework.
by Chetas Holagunda 3H
Mon Sep 30, 2019 10:22 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: What does dilution mean in a chemistry problem?
Replies: 8
Views: 258

Re: What does dilution mean in a chemistry problem?

I would suggest don't think of dilution as adding or taking out liters in a solution, but rather as decreasing the concentration of a solution while keeping the amount of solute the same.
by Chetas Holagunda 3H
Mon Sep 30, 2019 10:16 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Formula Units
Replies: 4
Views: 37

Re: Formula Units

In terms of the problems we are solving, I think they are the same since they are considered the same in the textbook questions. One mole is 6.022X10^23 of anything, so in order to calculate, just use Avogadro's number to solve for either atoms or formula units.
by Chetas Holagunda 3H
Mon Sep 30, 2019 9:58 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy vs Precision
Replies: 10
Views: 89

Re: Accuracy vs Precision

Precision refers to how close your measurements are to each other while accuracy represents how close to the true value the measurements are. Adding on, although your measurements may be thrown off because of a systematic error (e.g. the weighing scale is not calibrated correctly), they can be accou...

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