Search found 59 matches

by Akshay Chellappa 1H
Sun Dec 08, 2019 5:18 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Shortcut for Formal Charge
Replies: 14
Views: 483

Re: Shortcut for Formal Charge

Lyndon showed us that you can draw a circle around one of the atoms and count everything within the circle, any loan pair electrons and the bonded electrons (the circle breaks any bond in half so just count like 2 instead of 4 if there is a double bond), and subtract that from the number of valence ...
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:11 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH sig figs
Replies: 11
Views: 128

Re: pH sig figs

Yes
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:11 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: enthalpy?
Replies: 3
Views: 51

Re: enthalpy?

No, I do not believe so
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:09 pm
Forum: Naming
Topic: cobalt
Replies: 4
Views: 130

Re: cobalt

You only add -ate to the end when the complex is negatively charged.
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:06 pm
Forum: Lewis Acids & Bases
Topic: all acids and bases
Replies: 4
Views: 128

Re: all acids and bases

A lewis acid is an electron acceptor and a Bronsted acid is a proton donor. A Bronsted acid or base is always either a lewis acid or base, but some Lewis acids and bases are not considered to be Bronsted.
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:03 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8041
Views: 1411481

Re: Post All Chemistry Jokes Here

Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel.
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8041
Views: 1411481

Re: Post All Chemistry Jokes Here

Q: What did the scientist say when he found 2 isotopes of helium?
A: HeHe
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8041
Views: 1411481

Re: Post All Chemistry Jokes Here

Q: Anyone know any jokes about sodium?
A: Na
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8041
Views: 1411481

Re: Post All Chemistry Jokes Here

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
by Akshay Chellappa 1H
Sun Dec 08, 2019 5:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8041
Views: 1411481

Re: Post All Chemistry Jokes Here

Q: Why do chemists like nitrates so much?
A: They're cheaper than day rates.
by Akshay Chellappa 1H
Sun Dec 01, 2019 9:33 pm
Forum: Bronsted Acids & Bases
Topic: Definition Bronsted Acids
Replies: 3
Views: 47

Re: Definition Bronsted Acids

A Bronsted acid is a proton donor and the base is a proton acceptor
by Akshay Chellappa 1H
Sun Dec 01, 2019 9:27 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Transition metals
Replies: 4
Views: 122

Re: Transition metals

Transition metals also always have valence electrons in at least two shells instead of just one
by Akshay Chellappa 1H
Sun Dec 01, 2019 9:18 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 2
Views: 48

Re: Polydentate

A polydentate ligand can be recognized if it has more than 2 lewis base sites.
by Akshay Chellappa 1H
Sun Dec 01, 2019 6:59 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating pH of bases
Replies: 3
Views: 65

Re: Calculating pH of bases

I think you can just find the pOH, which just uses the same equation as finding the pH, and then subtract that value from 14.
by Akshay Chellappa 1H
Sun Dec 01, 2019 6:48 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating pH
Replies: 4
Views: 37

Re: Calculating pH

To find the pH you take the negative log of the hydrogen ion concentration of a solution.
by Akshay Chellappa 1H
Sun Nov 24, 2019 6:30 pm
Forum: Naming
Topic: polydentate?
Replies: 7
Views: 97

Re: polydentate?

A polydentate ligand can be recognized by having more than 2 lewis base sites, such as multiple lone pair donating sites used to bond to a central atom or ion.
by Akshay Chellappa 1H
Sun Nov 24, 2019 6:16 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: diamagnetism
Replies: 5
Views: 140

Re: diamagnetism

In addition, a compound is diamagnetic if it only contains paired electrons and is not attracted to a magnetic field.
by Akshay Chellappa 1H
Sun Nov 24, 2019 6:08 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: bond order
Replies: 4
Views: 120

Re: bond order

Bond order is the difference between the number of bonds and anti-bonds.
by Akshay Chellappa 1H
Sun Nov 24, 2019 5:32 pm
Forum: Biological Examples
Topic: TMs' biological functions
Replies: 3
Views: 46

Re: TMs' biological functions

I believe that this was a reference to Chromium(III) picolinate, which is a coordination compound.
by Akshay Chellappa 1H
Sun Nov 24, 2019 5:27 pm
Forum: Hybridization
Topic: Clarification
Replies: 2
Views: 39

Re: Clarification

Electron geometry describes the arrangement of electron groups whereas molecular geometry describes the arrangement of atoms, excluding lone pairs.
by Akshay Chellappa 1H
Sun Nov 17, 2019 10:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing molecules
Replies: 12
Views: 149

Re: Drawing molecules

I think we'll be asked to draw the lowest energy Lewis structure and then name the shape and what the bond angles are.
by Akshay Chellappa 1H
Sun Nov 17, 2019 10:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSPER
Replies: 7
Views: 180

Re: VSPER

VESPR is a model used to predict the geometry of molecules based on minimizing the electrostatic repulsion of a molecule's valence electrons around the central atom.
by Akshay Chellappa 1H
Sun Nov 17, 2019 9:59 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 8 HW
Replies: 4
Views: 81

Re: Week 8 HW

It'd probably be best to focus on problems from Outline 4 for this week, especially because the content from there will make up the majority of this weeks test.
by Akshay Chellappa 1H
Sun Nov 17, 2019 9:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vsepr angles
Replies: 10
Views: 75

Re: vsepr angles

Yes, I think that we are supposed to have the bond angles memorized for this test.
by Akshay Chellappa 1H
Sun Nov 17, 2019 9:45 pm
Forum: Student Social/Study Group
Topic: Test 2
Replies: 5
Views: 92

Re: Test 2

The test should be in your discussion section this week.
by Akshay Chellappa 1H
Mon Nov 11, 2019 11:03 am
Forum: Bond Lengths & Energies
Topic: Van Der Waals BP
Replies: 6
Views: 70

Re: Van Der Waals BP

Ionic forces have the greatest impact on boiling point.
by Akshay Chellappa 1H
Mon Nov 11, 2019 10:56 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: The Strength of Hydrogen Bonding
Replies: 4
Views: 41

Re: The Strength of Hydrogen Bonding

Although hydrogen bonds are one of the strongest intermolecular forces, ionic and covalent bonds are still stronger.
by Akshay Chellappa 1H
Mon Nov 11, 2019 10:53 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hydrogen Bonding in Biology
Replies: 2
Views: 24

Re: Hydrogen Bonding in Biology

This is because hydrogen bonding allow proteins to bend, fold, and fit into various shapes as necessary which determines the protein's biological activity.
by Akshay Chellappa 1H
Mon Nov 11, 2019 10:51 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: London Forces??
Replies: 3
Views: 35

Re: London Forces??

Dispersion forces are present between all molecules, whether they are polar or nonpolar. All molecules have dispersion forces because to have a dispersion force a molecule needs electrons, and since all molecules have electrons all molecules have dispersion forces.
by Akshay Chellappa 1H
Mon Nov 11, 2019 10:48 am
Forum: Resonance Structures
Topic: What is a Resonance "Structure"
Replies: 12
Views: 337

Re: What is a Resonance "Structure"

Resonance structures are two forms of a molecule where the chemical connectivity is the same but the electrons are distributed differently around the structure.
by Akshay Chellappa 1H
Sun Nov 03, 2019 11:25 pm
Forum: Trends in The Periodic Table
Topic: ionization energy vs electronegativity
Replies: 4
Views: 71

Re: ionization energy vs electronegativity

The main difference is that electron affinity gives the amount of energy released when an atom gains an electron while ionization energy is the amount of energy required to remove an electron from an atom.
by Akshay Chellappa 1H
Sun Nov 03, 2019 11:19 pm
Forum: Quantum Numbers and The H-Atom
Topic: magnetic quantum number
Replies: 5
Views: 58

Re: magnetic quantum number

The magnetic quantum number describes the orbitals available within a subshell.
by Akshay Chellappa 1H
Sun Nov 03, 2019 10:36 pm
Forum: Formal Charge and Oxidation Numbers
Topic: formal charge
Replies: 7
Views: 109

Re: formal charge

I believe that you only need to solve for formal charge if the question asks you to find the lowest energy lewis structure. I believe you wouldn't need to find the formal charge for compounds such as methane, ethane, and some of the other alkanes because they consist of single bonds and there aren't...
by Akshay Chellappa 1H
Sun Nov 03, 2019 10:27 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Shortcut for Formal Charge
Replies: 14
Views: 483

Re: Shortcut for Formal Charge

From the chemistry review session on Friday one of the UA's showed us that you can draw a circle around one of the atoms and count everything within the circle, any loan pair electrons and the bonded electrons (the circle breaks any bond in half so just count like 2 instead of 4 if there is a double...
by Akshay Chellappa 1H
Sun Nov 03, 2019 10:24 pm
Forum: Lewis Structures
Topic: Chloric acid
Replies: 1
Views: 34

Re: Chloric acid

From the youtube video that I watched on this it seems that the hydrogen atom bonds with the outermost oxygen atom because H is bonding with the polyatomic ion ClO3 to form an acid.
by Akshay Chellappa 1H
Sun Nov 03, 2019 10:18 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Work on Test
Replies: 2
Views: 48

Re: Formal Charge Work on Test

I think that if the question specifically asks to find the Formal Charge it would be better to write out the full formula. If the question just asks to draw the lowest energy Lewis structure it'd probably fine to do Lyndon's method.
by Akshay Chellappa 1H
Sun Oct 27, 2019 11:19 pm
Forum: Trends in The Periodic Table
Topic: Ionizatiom Energy
Replies: 1
Views: 34

Re: Ionizatiom Energy

This is because as shells fill up, more shells are added and the outermost electron becomes even more distant from the nucleus, which lowers the ionization energy because it is easier to remove that electron.
by Akshay Chellappa 1H
Sun Oct 27, 2019 11:03 pm
Forum: Lewis Structures
Topic: Lewis symbols
Replies: 5
Views: 72

Re: Lewis symbols

I believe that each atom would have a maximum of 6 dots as the single bond that connects the atom to the central atom would make up for the other 2 valence electrons.
by Akshay Chellappa 1H
Sun Oct 27, 2019 10:32 pm
Forum: Lewis Structures
Topic: Formal Charge [ENDORSED]
Replies: 6
Views: 82

Re: Formal Charge [ENDORSED]

Formal charge is the charge which is assigned to an atom in a molecule. To calculate formal charge you add the number of lone pair electrons to half of the number of bound electrons, and subtract the sum from the number of valence electrons.
by Akshay Chellappa 1H
Sun Oct 27, 2019 10:28 pm
Forum: Resonance Structures
Topic: Kekule Structure
Replies: 2
Views: 37

Re: Kekule Structure

A kekule structure is a Lewis structure in which bonded electron pairs in covalent bonds are represented with lines.
by Akshay Chellappa 1H
Sun Oct 27, 2019 10:26 pm
Forum: Trends in The Periodic Table
Topic: Inert-Pair Effect
Replies: 1
Views: 45

Re: Inert-Pair Effect

The inert-pair effect is the tendency to form ions two units lower in charge than expected from the group number; it is most pronounced for heavy elements in the p-block. An example of the inert-pair effect is Helium.
by Akshay Chellappa 1H
Sun Oct 27, 2019 10:17 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy Unit
Replies: 6
Views: 68

Re: Ionization Energy Unit

The units for ionization energy are kilojoules per mole.
by Akshay Chellappa 1H
Sun Oct 27, 2019 10:11 pm
Forum: Ionic & Covalent Bonds
Topic: electron configuration order
Replies: 6
Views: 128

Re: electron configuration order

I believe that 5s is filled before 4f.
by Akshay Chellappa 1H
Sun Oct 20, 2019 10:24 pm
Forum: DeBroglie Equation
Topic: Conversion Units for 1B.21
Replies: 3
Views: 56

Re: Conversion Units for 1B.21

When converting from ounces to grams: 1). Convert into pounds (1 lbs = 16 oz) 2). Convert from pounds to kilograms (2.2 lbs = 1 kg) 3). Convert from kilograms to grams. When converting from miles per hour into meters per second: 1). Convert from miles to meters (1mi = 1609.34m) 2). Convert from hour...
by Akshay Chellappa 1H
Sun Oct 20, 2019 10:11 pm
Forum: Properties of Light
Topic: 1F.19
Replies: 5
Views: 63

Re: 1F.19

This is because s-block metals usually have lower ionization energies when compared to p-block metals. With this low ionization energy, s-block metals tend to form cations, because they are more willing to give their electrons away, are are thus more reactive.
by Akshay Chellappa 1H
Sun Oct 20, 2019 10:04 pm
Forum: Molarity, Solutions, Dilutions
Topic: Test 1- Q5b
Replies: 4
Views: 203

Re: Test 1- Q5b

I don't know how you get 2.99mL based off of the values that you provided, but I was able to get 3.06mL. I believe that your mistake was that you divided by 1000 instead of multiplying by 1000 when converting from L to mL.
by Akshay Chellappa 1H
Sun Oct 20, 2019 9:55 pm
Forum: Molarity, Solutions, Dilutions
Topic: Test 1- Q5a
Replies: 2
Views: 149

Re: Test 1- Q5a

The steps for solving 5a were: 1). Convert the grams of aspirin provided, in my case it was 12.0g but I think the tests were different for each discussion, to moles by dividing by the molar mass. 2). Convert the mL of of ethanol provided to L by dividing by 1000. 3). Finding the molarity by diving t...
by Akshay Chellappa 1H
Sun Oct 20, 2019 9:48 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 7
Views: 122

Re: Atomic Radius

The atomic radius of an atom is found by measuring the distance between the nuclei of two touching atoms. I believe that the atomic radius increases from right to left and from top to bottom on the periodic table.
by Akshay Chellappa 1H
Sun Oct 20, 2019 9:38 pm
Forum: Molarity, Solutions, Dilutions
Topic: Test 1- Q5b
Replies: 4
Views: 203

Re: Test 1- Q5b

Did you remember to convert your final answer from Liters to Milliliters?
by Akshay Chellappa 1H
Fri Oct 11, 2019 10:15 pm
Forum: DeBroglie Equation
Topic: Crossing out units
Replies: 3
Views: 51

Re: Crossing out units

Because you are multiplying s^-2 by s in the numerator you need to add their exponents, in this case -2 and 1, which leaves you with s^-1. This is also canceled out because you are dividing by s^-1, which means you need to subtract -1 from -1, which ultimately leaves you with 0 and cancels out secon...
by Akshay Chellappa 1H
Fri Oct 11, 2019 9:43 pm
Forum: DeBroglie Equation
Topic: The Constant, h
Replies: 2
Views: 47

Re: The Constant, h

The constant h is Planck's constant. Planck's constant is equal to 6.626*10^-34 J*s, and it is also used when finding the energy of light in the equation E=hv.
by Akshay Chellappa 1H
Fri Oct 11, 2019 9:15 pm
Forum: DeBroglie Equation
Topic: P
Replies: 3
Views: 82

Re: P

P is the variable assigned to Momentum. To find P, you need to multiply mass and velocity together. The units for P are kilogram meter per second, kg*m/s.
by Akshay Chellappa 1H
Fri Oct 11, 2019 9:09 pm
Forum: Properties of Light
Topic: Adding formulas
Replies: 5
Views: 64

Re: Adding formulas

I believe that E=(hc)/lambda is the equation used to find the energy of a Photon. Dr. Lavelle probably added the equations to show us how the final equation was initially derived.
by Akshay Chellappa 1H
Fri Oct 11, 2019 9:06 pm
Forum: Einstein Equation
Topic: Variables in equations
Replies: 4
Views: 89

Re: Variables in equations

I think the easiest way to differentiate between nu and velocity would to just memorize all of the ways that one of the two can be applied in chemistry. So far, I think we've only seen velocity used to calculate momentum for De Broglie's Wave Equation. As we move through the quarter it might be a go...
by Akshay Chellappa 1H
Sat Oct 05, 2019 12:01 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configuration order
Replies: 4
Views: 71

Re: Electron configuration order

Notation is written by increasing energy, so maybe because the d-orbital is not completely filled it actually has a lower energy level than the s-orbital.
by Akshay Chellappa 1H
Fri Oct 04, 2019 11:53 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical and Molecular Formulas
Replies: 2
Views: 83

Re: M. 19

I believe that Nitrogen is found in caffeine so when burned it is released as a gas.
by Akshay Chellappa 1H
Fri Oct 04, 2019 11:24 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Showing work in detail
Replies: 7
Views: 305

Re: Showing work in detail

I don't think they have to be too detailed as long as your work is clear and easy to follow. However, I feel like it's better to have a more detailed dimensional analysis so that you can check your own work.
by Akshay Chellappa 1H
Fri Oct 04, 2019 11:16 pm
Forum: Limiting Reactant Calculations
Topic: Textbook M15-Calculation?
Replies: 3
Views: 61

Re: Textbook M15-Calculation?

What did you calculate as the mass of AlCl3 produced based on the 535 grams of Cl2? For percent yield you would need to divide the actual yield, 300grams of AlCl3, by the theoretical yield, your calculation, and multiply that by 100.
by Akshay Chellappa 1H
Fri Oct 04, 2019 6:16 pm
Forum: Einstein Equation
Topic: Planack's constant
Replies: 8
Views: 197

Re: Planack's constant

I believe that Planck's constant is used when calculating the energy of a photon. It is represented by the variable h in the equation E=hv.

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