Search found 53 matches

by Ayush Ray 1I
Sun Dec 08, 2019 12:32 am
Forum: Polyprotic Acids & Bases
Topic: HCLO4 vs. H3PO4
Replies: 1
Views: 64

HCLO4 vs. H3PO4

Which is the stronger acid and why
by Ayush Ray 1I
Sat Dec 07, 2019 4:46 pm
Forum: Biological Examples
Topic: Marshmallow Review #22
Replies: 1
Views: 51

Marshmallow Review #22

The amino acid histidine binds to the heme complex iron to form myoglobin. How many O2 molecules can myoglobin bind? How many myoglobins form a hemoglobin
by Ayush Ray 1I
Sat Dec 07, 2019 1:11 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelating ligands
Replies: 1
Views: 42

Chelating ligands

Can someone explain what determines if a ligand is cheating or not. I’m still confused.
by Ayush Ray 1I
Wed Dec 04, 2019 11:51 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ice tables
Replies: 3
Views: 44

Ice tables

Did Dr. Lavelle mention that we don’t have to review ICE tables for the final exam?
by Ayush Ray 1I
Tue Dec 03, 2019 6:46 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6B.3 (b)
Replies: 3
Views: 71

6B.3 (b)

A careless laboratory technician wants to prepare 200.0 mL of a 0.025 m HCl(aq) solution but uses a volumetric flask of vol- ume 250.0 mL by mistake. (a) What would the pH of the desired solution have been? (b) What will be the actual pH of the solution as prepared?
by Ayush Ray 1I
Sat Nov 30, 2019 11:50 pm
Forum: Amphoteric Compounds
Topic: 6A.17
Replies: 3
Views: 42

6A.17

State whether the following oxides are acidic, basic, or amphoteric:
(a) BaO
(b) SO3
(c) As2O3
(d) Bi2O3
by Ayush Ray 1I
Sat Nov 30, 2019 11:45 pm
Forum: Bronsted Acids & Bases
Topic: 6A.11
Replies: 2
Views: 35

6A.11

Write the chemical equations of the two proton transfer equilibria that demonstrate the amphiprotic character of
(a) HCO3-
(b) HPO42-
Identify the conjugate acid-base pairs in each case
by Ayush Ray 1I
Sat Nov 30, 2019 5:46 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 3
Views: 65

Re: Final Exam

Also, how many questions is the final going to be?
by Ayush Ray 1I
Sat Nov 30, 2019 3:00 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 2
Views: 50

Final

When will we be done covering topics for the final in lecture?
by Ayush Ray 1I
Sat Nov 30, 2019 2:56 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 3
Views: 65

Final Exam

When is the final exam and how long is it supposed to be?
by Ayush Ray 1I
Sun Nov 24, 2019 6:39 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 9C.9
Replies: 1
Views: 22

9C.9

With the help of Table 9C.1, determine the coordination number of the metal ion in each of the following complexes:
(a) [NiCl4]2–
(b) [Ag(NH3)2]+
(c) [PtCl2(en)2]2+
(d) [Cr(edta)]-
by Ayush Ray 1I
Sun Nov 24, 2019 6:36 pm
Forum: Naming
Topic: 9C.1
Replies: 3
Views: 44

9C.1

Name each of the following complex ions and identify the oxidation number of the metal:
(a) [Fe(CN)6]4-; (b) [Co(NH3)6]3+;(c) [Co(CN)5(OH2)]2-; (d) [Co(NH3)5(SO4)]+.
by Ayush Ray 1I
Thu Nov 21, 2019 12:27 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: dipole-dipole vs induced dipole
Replies: 9
Views: 88

dipole-dipole vs induced dipole

What exactly is an induced dipole and what is the difference between an induced dipole and dipole-dipole?
by Ayush Ray 1I
Sun Nov 17, 2019 11:28 pm
Forum: Bond Lengths & Energies
Topic: Test 2 Topics
Replies: 40
Views: 708

Re: Test 2 Topics

All of 2E and 2F. Some concepts from 2D
by Ayush Ray 1I
Sun Nov 17, 2019 8:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Terminal Atom
Replies: 2
Views: 30

Terminal Atom

What is a terminal atom?
by Ayush Ray 1I
Sun Nov 17, 2019 5:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: (CH3)2Be
Replies: 1
Views: 30

(CH3)2Be

What is the bond angle for the central atom of (CH3)2Be?
by Ayush Ray 1I
Sun Nov 17, 2019 2:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.1
Replies: 1
Views: 34

2E.1

Below are ball-and-stick models of two molecules. In each case, indicate whether there must be, maybe, or cannot be one or more lone pairs of electrons on the central atom. Both molecules consist of 3 atoms. The first molecule has a bond angle of 120 degrees between the central atom and the other tw...
by Ayush Ray 1I
Tue Nov 12, 2019 1:28 pm
Forum: Student Social/Study Group
Topic: Test 2
Replies: 7
Views: 109

Test 2

What topics will test 2 cover? Also, will it cover topics before the midterm?
by Ayush Ray 1I
Tue Nov 12, 2019 12:57 pm
Forum: Bronsted Acids & Bases
Topic: Autoprotolysis
Replies: 1
Views: 51

Autoprotolysis

What exactly is autoprotolysis? Also, can someone please explain what the autoprotolysis constant represents.
by Ayush Ray 1I
Tue Nov 12, 2019 12:52 pm
Forum: Amphoteric Compounds
Topic: Amphiprotic
Replies: 11
Views: 115

Amphiprotic

What does it mean for something to be amphiprotic? Also, what is the difference between amphiprotic and amphoteric?
by Ayush Ray 1I
Tue Nov 12, 2019 12:49 pm
Forum: Amphoteric Compounds
Topic: Question 6A.11
Replies: 5
Views: 114

Question 6A.11

Write the chemical equations of the two proton transfer
equilibria that demonstrate the amphiprotic character of (a) HCO3-; (b) HPO4 2-
Identify the conjugate acid–base pairs in each case.
by Ayush Ray 1I
Thu Nov 07, 2019 10:16 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1355571

Re: Post All Chemistry Jokes Here

My midterm grade
by Ayush Ray 1I
Mon Nov 04, 2019 1:18 pm
Forum: General Science Questions
Topic: Concept Questions
Replies: 2
Views: 59

Concept Questions

Are there any resources we can use to practice concept questions for the midterm (not problems).
by Ayush Ray 1I
Sun Nov 03, 2019 5:31 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy Exceptions
Replies: 2
Views: 37

Ionization Energy Exceptions

What are the exceptions to the trend of ionization energy in the periodic table?
by Ayush Ray 1I
Sun Nov 03, 2019 5:25 pm
Forum: Bond Lengths & Energies
Topic: Next Lecture
Replies: 3
Views: 49

Next Lecture

For lecture tomorrow, are we going over review for the midterm or is Dr. Lavelle starting new material.
by Ayush Ray 1I
Sun Nov 03, 2019 5:22 pm
Forum: Student Social/Study Group
Topic: Lyndon Workshop
Replies: 1
Views: 65

Lyndon Workshop

Is Lyndon having another workshop or review session before the midterm?
by Ayush Ray 1I
Sun Nov 03, 2019 1:53 pm
Forum: Lewis Structures
Topic: Resonance Hybrid
Replies: 2
Views: 28

Resonance Hybrid

Will we have to have a grasp of resonance hybrids and be able to draw those lewis structures for the midterm? (Ex: Benzene)
by Ayush Ray 1I
Sat Nov 02, 2019 6:04 pm
Forum: Student Social/Study Group
Topic: Chemical Formulas
Replies: 3
Views: 60

Chemical Formulas

For the midterm, will we have to write chemical formulas from the name of the compound or will the formula be given already?
by Ayush Ray 1I
Sun Oct 27, 2019 5:59 pm
Forum: Student Social/Study Group
Topic: Midterm Length
Replies: 7
Views: 136

Midterm Length

Has Lavelle mentioned how long the midterm is supposed to be
by Ayush Ray 1I
Sun Oct 27, 2019 5:38 pm
Forum: Student Social/Study Group
Topic: Miderm Review
Replies: 10
Views: 206

Re: Miderm Review

Alright. Thank You so much. I'm debating whether I should spend the $64 or not.
by Ayush Ray 1I
Sun Oct 27, 2019 4:12 pm
Forum: Student Social/Study Group
Topic: Miderm Review
Replies: 10
Views: 206

Re: Miderm Review

Do I have to pay for Sapling? The website says I have to pay $64 to enroll in the "Homework Course"
by Ayush Ray 1I
Sun Oct 27, 2019 1:51 pm
Forum: Student Social/Study Group
Topic: Miderm Review
Replies: 10
Views: 206

Miderm Review

Outside of the review sessions, does Lavelle offer any study guides or practice tests prior to the midterm?
by Ayush Ray 1I
Sat Oct 26, 2019 12:19 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Valence Electrons in D-block
Replies: 1
Views: 23

Valence Electrons in D-block

Can somebody please explain how we're supposed to figure out how many valence electrons are in d-block elements
by Ayush Ray 1I
Sun Oct 20, 2019 2:44 pm
Forum: Quantum Numbers and The H-Atom
Topic: 1D.1
Replies: 5
Views: 77

Re: 1D.1

Why is that
by Ayush Ray 1I
Sun Oct 20, 2019 2:38 pm
Forum: Quantum Numbers and The H-Atom
Topic: 1D.1
Replies: 5
Views: 77

1D.1

Which of the following increase when the electron in a hydrogen atom undergoes a transition from the 1s-orbital to a 2p-orbital?
(a) Energy of the electron.
(b) Value of n.
(c) Value of l.
(d) Radius of the atom.
by Ayush Ray 1I
Sat Oct 19, 2019 3:13 pm
Forum: DeBroglie Equation
Topic: 1B.15 a
Replies: 4
Views: 49

Re: 1B.15 a

Oh, alright. Thank you so much.
by Ayush Ray 1I
Sat Oct 19, 2019 3:10 pm
Forum: DeBroglie Equation
Topic: 1B.15 a
Replies: 4
Views: 49

1B.15 a

The velocity of an electron that is emitted from a
metallic surface by a photon is 3.63 x 10^3 km/s
(a) What is the wavelength of the ejected electron?

I'm confused because the solution manual says to use de Broglie's equation. However, there is no mass given in the question.
by Ayush Ray 1I
Sat Oct 19, 2019 3:04 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Question about last lecture
Replies: 4
Views: 43

Re: Question about last lecture

So for future tests and exams, should we use the second method only?
by Ayush Ray 1I
Sat Oct 19, 2019 2:08 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Question about last lecture
Replies: 4
Views: 43

Question about last lecture

When Dr. Lavelle was writing the electron configuration for Carbon, he changed it from 1s^2 2s^2 2p^2 to1s^2 2s^2 2px^1 2py^1. Why did he make the change? I missed when he talked about it.
by Ayush Ray 1I
Wed Oct 16, 2019 12:51 am
Forum: Properties of Light
Topic: The extent of the change in the electrical field
Replies: 2
Views: 55

The extent of the change in the electrical field

What does "The extent of the change in the electrical field" mean exactly?
by Ayush Ray 1I
Sun Oct 13, 2019 9:45 pm
Forum: *Shrodinger Equation
Topic: Schrodinger's Equation
Replies: 8
Views: 133

Schrodinger's Equation

Can someone please further explain what Schrodinger's Equation is used for exactly. I'm still unsure.
by Ayush Ray 1I
Sun Oct 13, 2019 2:58 pm
Forum: Properties of Light
Topic: Photon Model
Replies: 3
Views: 47

Re: Photon Model

Light behaves as both a wave and a particle. Those particles are represented as photons.
by Ayush Ray 1I
Sun Oct 13, 2019 1:46 pm
Forum: Photoelectric Effect
Topic: Video Modules
Replies: 7
Views: 61

Video Modules

Does Dr. Lavelle recommend we watch and take notes on the modules before going forward with the HW?
by Ayush Ray 1I
Sun Oct 13, 2019 1:42 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: First Test Result
Replies: 5
Views: 179

First Test Result

Does anybody know when we are supposed to get our first tests back and graded? Is it supposed to be in our discussion this week?
by Ayush Ray 1I
Wed Oct 09, 2019 8:49 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Wrong Textbook
Replies: 12
Views: 383

Re: Wrong Textbook

I have the 6th edition, and everything looks the same to me when compared to the 7th edition.
by Ayush Ray 1I
Sun Oct 06, 2019 9:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 158
Views: 112305

Re: Advice from a Medical Student [ENDORSED]

Thank You so much for posting this. I've been stressing a lot recently, and this really cleared things up for me.
by Ayush Ray 1I
Sun Oct 06, 2019 4:24 pm
Forum: Empirical & Molecular Formulas
Topic: Chemical Formulas
Replies: 2
Views: 58

Re: Chemical Formulas

Our TA said we should memorize diatomic ions.
by Ayush Ray 1I
Sun Oct 06, 2019 4:20 pm
Forum: Limiting Reactant Calculations
Topic: Reviewing High School Chem Tips
Replies: 10
Views: 101

Re: Reviewing High School Chem Tips

Tyler Dewitt posts some great videos on YouTube if you're struggling to grasp some specific concepts.
by Ayush Ray 1I
Sun Oct 06, 2019 1:24 pm
Forum: Balancing Chemical Reactions
Topic: Hydrates
Replies: 1
Views: 36

Re: Hydrates

Yes you include the molar mass of the hydrate. In this case you would include the 5 moles of H2O making the total molar mass to be 249.6 g/mol
by Ayush Ray 1I
Thu Oct 03, 2019 1:03 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Homework Problem E.15
Replies: 4
Views: 97

Re: Homework Problem E.15

Alright. I got it. Thank You.
by Ayush Ray 1I
Tue Oct 01, 2019 11:49 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Homework Problem E.15
Replies: 4
Views: 97

Homework Problem E.15

The molar mass of the metal hydroxide M(OH)2 is 74.10 g*mol^-1. What is the molar mass of the sulfide of this metal?

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