Search found 63 matches

by Chinmayi Mutyala 3H
Sun Jan 17, 2021 2:42 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure Rule
Replies: 29
Views: 188

Re: Pressure Rule

You only look at molecules in the gas phase since those are the one's whose concentration is affected by a change in pressure. However, this change in pressure must cause a change in the volume of the container. If the pressure is changed by adding another gas, it won't affect the concentrations of ...
by Chinmayi Mutyala 3H
Sun Jan 17, 2021 2:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ka x Kb
Replies: 11
Views: 33

Re: Ka x Kb

Yes! This is because when you multiple the two, the other reactants and products will cancel out and you will be left with [H3O+][OH-] which is the equation for Kw.
by Chinmayi Mutyala 3H
Sun Jan 17, 2021 2:39 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: q vs k
Replies: 62
Views: 162

Re: q vs k

If Q = K, the reaction is at equilibrium.
by Chinmayi Mutyala 3H
Sun Jan 17, 2021 2:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Amphiprotic
Replies: 8
Views: 23

Re: Amphiprotic

Amphiprotic means it can act as both a proton donor or acceptor. Water is an example because it can donate an H+ and become OH- or it can accept an H+ and become H3O+.
by Chinmayi Mutyala 3H
Sun Jan 17, 2021 2:37 pm
Forum: Ideal Gases
Topic: Does temperature matter?
Replies: 19
Views: 69

Re: Does temperature matter?

When the temperature changes, K will change. These problems usually give us a temperature to let us know that the reaction is occurring at the same temperature as K is being reported at.
by Chinmayi Mutyala 3H
Sun Jan 10, 2021 10:47 pm
Forum: Ideal Gases
Topic: value of R
Replies: 24
Views: 74

Re: value of R

You look at the units of R. It depends on what units of pressure you're using.
by Chinmayi Mutyala 3H
Sun Jan 10, 2021 10:46 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure and Volume
Replies: 16
Views: 40

Re: Pressure and Volume

For me, it's easy to understand the relationship between the two when you look at a balloon. If you have a large balloon (high volume), the particles inside have a lot more area to move around in which is why there's lower pressure. If the balloon is smaller, the particles are moving around in a sma...
by Chinmayi Mutyala 3H
Sun Jan 10, 2021 10:44 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 72
Views: 438

Re: PV=nRT

P: pressure
V: volume
n: moles
R: R constant
T: temperature
by Chinmayi Mutyala 3H
Sun Jan 10, 2021 10:43 pm
Forum: Ideal Gases
Topic: reversing reactions
Replies: 80
Views: 386

Re: reversing reactions

K is products over reactants so if you use the reverse reaction, K would be the reactants over the products. That's why K (reverse) is 1/K (forward)
by Chinmayi Mutyala 3H
Sun Jan 10, 2021 10:42 pm
Forum: Ideal Gases
Topic: partial pressures
Replies: 14
Views: 62

Re: partial pressures

Partial pressures is the pressure of each individual gas. When all the partial pressures are added up, you get the total pressure. It can be convereted to concentration (which is measured in mol/L) using the ideal gas law: PV = nRT --> you solve to get n/V which would be mol/L.
by Chinmayi Mutyala 3H
Thu Dec 10, 2020 9:58 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Transition Metal Complexes
Replies: 5
Views: 38

Re: Transition Metal Complexes

Whether it is tetrahedral or octohedral depends on the number of ligands it is bonded two, 4 for tetrahedral/square planer and 6 for octohedral.
by Chinmayi Mutyala 3H
Thu Dec 10, 2020 9:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AX3E2
Replies: 7
Views: 60

Re: AX3E2

This is what I got from the lecture. If the lone pairs are on the top and bottom, they'll be 90 degrees away from all the other bonds which is not the best for them to be as far away as possible. You want them to be as far away are possible so the lone pairs are kind angled in the axis in three dime...
by Chinmayi Mutyala 3H
Thu Dec 10, 2020 9:48 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Chem Final
Replies: 7
Views: 62

Re: Chem Final

2F has to do with the Molecular Shape unit so it wasn't on Midterm 2. Midterm 2 had upto 2D which had to do with Chemical Bonds.
by Chinmayi Mutyala 3H
Thu Dec 10, 2020 9:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Kate's Molecular Shape and Hybridization Review
Replies: 2
Views: 77

Re: Kate's Molecular Shape and Hybridization Review

Thank you so much Kate! I learned a lot from you this quarter!!
by Chinmayi Mutyala 3H
Thu Dec 10, 2020 6:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Matthew's Workshop - Week 10
Replies: 2
Views: 802

Re: Matthew's Workshop - Week 10

Thank you so much Matthew! I learned a lot from you this quarter!!
by Chinmayi Mutyala 3H
Thu Dec 10, 2020 2:50 am
Forum: Biological Examples
Topic: Final Exam
Replies: 8
Views: 122

Re: Final Exam

During the workshop I attended, the UA said to know about cisplatin and the heme complex.
by Chinmayi Mutyala 3H
Thu Dec 03, 2020 10:47 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: d vs s orbitals
Replies: 7
Views: 93

Re: d vs s orbitals

They don't contradict each other because s orbitals have lower energy, so that's why electrons are added to 4s before 3d and since they have lower energy, they are easy to remove so when a cation is formed, they are removed from 4s orbitals.
by Chinmayi Mutyala 3H
Thu Dec 03, 2020 10:43 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi Bonds
Replies: 31
Views: 393

Re: Sigma and Pi Bonds

Based on the outline, I don't think we'll be asked this on the test.
by Chinmayi Mutyala 3H
Thu Dec 03, 2020 10:42 pm
Forum: Hybridization
Topic: Difference between hybrid orbitals and hybridization
Replies: 5
Views: 689

Re: Difference between hybrid orbitals and hybridization

The hybrid orbital specifies the principal quantum number (n) of the orbital.
by Chinmayi Mutyala 3H
Thu Dec 03, 2020 10:41 pm
Forum: Hybridization
Topic: Why do double bonds (and triple bonds) count as one region of electron density?
Replies: 8
Views: 80

Re: Why do double bonds (and triple bonds) count as one region of electron density?

Whether it's a double bond or a single bond, there is only one hybrid orbital that will participate in a sigma bond. The other bonds come from overlapping p-orbitals (pi bonds). This is why you only count it as one region of electron density.
by Chinmayi Mutyala 3H
Thu Dec 03, 2020 9:49 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Number
Replies: 14
Views: 97

Re: Finding Coordination Number

The coordination number is the number of bonds the transition metal forms.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:13 pm
Forum: Hybridization
Topic: Definition of Hybridization
Replies: 5
Views: 59

Re: Definition of Hybridization

Hybridization is the mixing of orbitals and it happens when an atom binds with other atoms so you can't tell what the hydridization will be from the electron configuration of the atom alone.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:12 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: delocalized pi bond
Replies: 8
Views: 75

Re: delocalized pi bond

A delocalized pi bond is present in a molecule that has resonance because the e- are delocalized.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: sigma vs pi bonds
Replies: 33
Views: 185

Re: sigma vs pi bonds

Single bonds are sigma bonds and double bonds have one sigma and one pi bond. The difference is that in sigma bonds, the ends of the orbitals overlap and in pi bonds, parallel orbitals overlap side to side.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:09 pm
Forum: Octet Exceptions
Topic: Expansion for 3s?
Replies: 4
Views: 47

Re: Expansion for 3s?

No, it would need to have a d-orbital and atoms in 3s don't use the d-orbital.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:07 pm
Forum: Electronegativity
Topic: Calculating elctronegativity
Replies: 3
Views: 44

Re: Calculating elctronegativity

You don't need to know the values, you should just know the periodic trends.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:07 pm
Forum: Dipole Moments
Topic: Polarity from Shape
Replies: 12
Views: 108

Re: Polarity from Shape

It doesn't need to be bent. You have to check whether the dipole moments cancel out on the sides of the molecule.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:05 pm
Forum: Bond Lengths & Energies
Topic: Hydrogen Bonds
Replies: 16
Views: 109

Re: Hydrogen Bonds

No, hydrogen bonds require hydrogen bonding with an electronegative atom.
by Chinmayi Mutyala 3H
Sun Nov 29, 2020 8:05 pm
Forum: Resonance Structures
Topic: Same formal charges, which resonance structure?
Replies: 4
Views: 25

Re: Same formal charges, which resonance structure?

The more electronegative atom would have the negative formal charge.
by Chinmayi Mutyala 3H
Mon Nov 16, 2020 12:48 am
Forum: Dipole Moments
Topic: Which interactions are intermolecular?
Replies: 7
Views: 58

Re: Which interactions are intermolecular?

Yes they are. Intermolecular forces hold separate molecules together and intramolecular forces are forces that hold a single molecule together.
by Chinmayi Mutyala 3H
Mon Nov 16, 2020 12:46 am
Forum: Electronegativity
Topic: determining electronegativity
Replies: 31
Views: 253

Re: determining electronegativity

Electronegativity increases as you go to the right and it decreases as you go down on the periodic table.
by Chinmayi Mutyala 3H
Mon Nov 16, 2020 12:45 am
Forum: Formal Charge and Oxidation Numbers
Topic: Spin State
Replies: 8
Views: 92

Re: Spin State

I don't think we need to know about the specifics of how we got the value exactly; just that + means upward spin and - means downward spin.
by Chinmayi Mutyala 3H
Mon Nov 16, 2020 12:44 am
Forum: Bond Lengths & Energies
Topic: Valence electrons of nitrogen
Replies: 10
Views: 45

Re: Valence electrons of nitrogen

He was referring to the octet rule. It has 5 valence electrons but it wants 8.
by Chinmayi Mutyala 3H
Mon Nov 16, 2020 12:44 am
Forum: Dipole Moments
Topic: London Dispersion Forces
Replies: 4
Views: 15

Re: London Dispersion Forces

They happen for all: both nonpolar and polar molecules.
by Chinmayi Mutyala 3H
Mon Nov 16, 2020 12:43 am
Forum: Ionic & Covalent Bonds
Topic: Workshop Hydrogen Bonding Question
Replies: 4
Views: 34

Re: Workshop Hydrogen Bonding Question

There is not that great of an electronegativity different between C and H for it to be a polar bond.
by Chinmayi Mutyala 3H
Sun Nov 08, 2020 11:30 pm
Forum: Bond Lengths & Energies
Topic: Bond Lengths
Replies: 10
Views: 76

Re: Bond Lengths

I'm not sure what your question is asking exactly but just a trend to know is that double bonds are shorter than single bonds.
by Chinmayi Mutyala 3H
Sun Nov 08, 2020 11:28 pm
Forum: Quantum Numbers and The H-Atom
Topic: subshells and orbitals
Replies: 9
Views: 95

Re: subshells and orbitals

I think subshell is the combination of the shell and the which orbital it is (which would be represented by l). I'm not sure if this is the best way of explaining it.
by Chinmayi Mutyala 3H
Sun Nov 08, 2020 11:26 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charges and stability
Replies: 5
Views: 58

Re: Formal charges and stability

It probably depends on the situation but I would say it's probably more stable to have it spread out since you don't want a lot of electrons in one region since that leads to electron-electron repulsions.
by Chinmayi Mutyala 3H
Sun Nov 08, 2020 11:25 pm
Forum: Lewis Structures
Topic: octet rule
Replies: 7
Views: 56

Re: octet rule

There are certain times when it can be violated such as P and I which are exceptions because they have an expanded valence orbital. These are just exceptions we'll have to memorize.
by Chinmayi Mutyala 3H
Sun Nov 08, 2020 11:24 pm
Forum: Sigma & Pi Bonds
Topic: Hybridization for p
Replies: 4
Views: 139

Re: Hybridization for p

Pi bonds do not use hybridization. They are formed by overlapping p-orbitals.
by Chinmayi Mutyala 3H
Sun Nov 08, 2020 11:22 pm
Forum: Ionic & Covalent Bonds
Topic: Atomic Radii
Replies: 5
Views: 24

Re: Atomic Radii

The 2p orbital is on the second shell which means the radius is increasing. Since there are more electrons, there is more repulsion between them so the radius increases.
by Chinmayi Mutyala 3H
Mon Nov 02, 2020 12:01 am
Forum: *Shrodinger Equation
Topic: Sapling week 2/3
Replies: 12
Views: 148

Re: Sapling week 2/3

Hi! This question has to do with Heisenberg Uncertainty/Indeterminacy principle.
by Chinmayi Mutyala 3H
Mon Nov 02, 2020 12:00 am
Forum: Photoelectric Effect
Topic: Kinetic Energy
Replies: 10
Views: 106

Re: Kinetic Energy

I feel like that should be true since higher frequency means more energy but maybe it's because the frequency isn't enough to eject the electron. I'm not sure if there were any additional details given in the question.
by Chinmayi Mutyala 3H
Sun Nov 01, 2020 11:58 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation for ions?
Replies: 4
Views: 69

Re: Rydberg Equation for ions?

This works for hydrogen only. There are some "corrections" that need to be made when doing this for other elements. I'm pretty sure we're just focusing on hydrogen but there's some information on this in the textbook.
by Chinmayi Mutyala 3H
Sun Nov 01, 2020 11:57 pm
Forum: *Particle in a Box
Topic: Energy Equations
Replies: 9
Views: 103

Re: Energy Equations

This would be determined based on what information is given in the question.
by Chinmayi Mutyala 3H
Sun Nov 01, 2020 11:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation Points [ENDORSED]
Replies: 62
Views: 1013

Re: Participation Points [ENDORSED]

Any post or reply counts for participation points. You can click on your name to see how many posts you did and the day they were posted.
by Chinmayi Mutyala 3H
Sun Oct 25, 2020 11:47 pm
Forum: *Particle in a Box
Topic: Midterm 1
Replies: 16
Views: 258

Re: Midterm 1

Hi! We will not be tested on the particle in a box on the midterm. Dr Lavelle said in his lecture today that our midterm will only go up to the last slide he did which introduced the different atomic orbitals and did not discuss a particle in a box. In general, our midterm will only contain all the...
by Chinmayi Mutyala 3H
Sun Oct 25, 2020 11:45 pm
Forum: Balancing Chemical Reactions
Topic: States of matter in chem equations
Replies: 13
Views: 115

Re: States of matter in chem equations

Samin Kabir wrote:Hello,
When we have to balance chem equations do we have to include the states of matter in all components. Additionally how do we know what state of matter a reactant/product is in?


I would add it in just to be safe and it should be given in the question.
by Chinmayi Mutyala 3H
Sun Oct 25, 2020 11:44 pm
Forum: Molarity, Solutions, Dilutions
Topic: Solute vs Solvent
Replies: 6
Views: 89

Re: Solute vs Solvent

Hi! What makes something a solvent or a solute? How can we just know? I know that solutes are dissolved in solvents to create a solution such as salt and water, respectively. However, if given two items, how would I know? What makes something soluble I guess? I don't think his questions will go sup...
by Chinmayi Mutyala 3H
Sun Oct 25, 2020 11:43 pm
Forum: SI Units, Unit Conversions
Topic: units to know for midterm
Replies: 11
Views: 149

Re: units to know for midterm

905579227 wrote:Do you guys know what will be allowed on the midterm? Also do we have to memorize the conversions or will that be provided.


The conversions will be provided. I would say you should memorize the electromagnetic spectrum and the prefixes like giga- , mega- etc.
by Chinmayi Mutyala 3H
Sun Oct 25, 2020 11:40 pm
Forum: *Shrodinger Equation
Topic: Schrodinger on MT
Replies: 7
Views: 84

Re: Schrodinger on MT

I believe we just need to know the relationship between Schrodinger's and orbitals.
by Chinmayi Mutyala 3H
Sun Oct 18, 2020 4:05 pm
Forum: Photoelectric Effect
Topic: What happens to absorbed photons?
Replies: 6
Views: 60

Re: What happens to absorbed photons?

I'm not entirely sure but since they've given up all their energy to the electron, I think they just get destroyed in the process.
by Chinmayi Mutyala 3H
Sun Oct 18, 2020 4:02 pm
Forum: SI Units, Unit Conversions
Topic: Metric Conversions
Replies: 9
Views: 117

Re: Metric Conversions

hi! Mine is kind of weird. I do: the G reat M aster K night D id C ommit M urder U nder N o P retenses. G - giga M - mega K - kilo D - deci C - centi M - milli u - micro n - nano p -pico It is so weird that I have no trouble remembering it. I don't remember where it is from, but it works. :) Whoa! ...
by Chinmayi Mutyala 3H
Sun Oct 18, 2020 4:00 pm
Forum: Balancing Chemical Reactions
Topic: Mixed Numbers
Replies: 7
Views: 90

Re: Mixed Numbers

Your final answer should have whole number coefficients.
by Chinmayi Mutyala 3H
Sun Oct 18, 2020 3:59 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test Accuracy
Replies: 13
Views: 154

Re: Test Accuracy

I believe this depends on how strict your TA is on sig figs but I would round to the correct number of sig figs on your final answer based on the numbers given to you in the problem just to be safe.
by Chinmayi Mutyala 3H
Sun Oct 18, 2020 3:57 pm
Forum: Properties of Electrons
Topic: protons and electrons
Replies: 33
Views: 191

Re: protons and electrons

Protons and neutrons have similar masses and electrons have a much lower mass than protons and neutrons.
by Chinmayi Mutyala 3H
Sun Oct 18, 2020 3:55 pm
Forum: Limiting Reactant Calculations
Topic: Exam Material
Replies: 2
Views: 36

Re: Exam Material

Also, for the external camera, I believe it's okay to use a phone.
by Chinmayi Mutyala 3H
Thu Oct 08, 2020 1:35 pm
Forum: Limiting Reactant Calculations
Topic: How do we find the amount of oxygen in combustion?
Replies: 10
Views: 525

Re: How do we find the amount of oxygen in combustion?

I'm not sure if this is what you're asking but once you find the mass of carbon and hydrogen, you can subtract that from the mass of the original compound to find the mass of oxygen.
by Chinmayi Mutyala 3H
Thu Oct 08, 2020 1:29 pm
Forum: General Science Questions
Topic: Nomenclature
Replies: 7
Views: 98

Re: Nomenclature

Hi! I think it's good to know some information but I think it'll be given on the test. You should look at Fundamentals D in the textbook.
by Chinmayi Mutyala 3H
Thu Oct 08, 2020 1:17 pm
Forum: Balancing Chemical Reactions
Topic: Reaction Terminology "In excess"
Replies: 11
Views: 129

Re: Reaction Terminology "In excess"

Yes! When a reactant is in excess, it means the other reactant is limiting.
by Chinmayi Mutyala 3H
Thu Oct 08, 2020 1:16 pm
Forum: Limiting Reactant Calculations
Topic: Sapling HW Week 1 Question #10
Replies: 8
Views: 120

Re: Sapling HW Week 1 Question #10

Hi! I was a little stressed when I saw this question. I see a lot of people already answered it but I went to a workshop and the UA said that we wouldn't be expected to figure out the molar masses from just those diagrams on a test.
by Chinmayi Mutyala 3H
Thu Oct 08, 2020 1:14 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Review of Chemical and Physical Principles Fundamentals E.15
Replies: 7
Views: 44

Re: Review of Chemical and Physical Principles Fundamentals E.15

I was confused by this at first too. It's basically asking what the molar mass would be if that metal were a sulfide, so if it was combined with sulfur. So you would first find out what the metal is and then figure out what the molar mass would be if it were a sulfide.
by Chinmayi Mutyala 3H
Thu Oct 08, 2020 1:12 pm
Forum: Significant Figures
Topic: Sig Figs for Molar Mass
Replies: 14
Views: 115

Re: Sig Figs for Molar Mass

I would use as many as there is available in the beginning and then at the end, I would round to the number with the least significant figures which is probably going to be whatever number was given in the problem itself.

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