Search found 35 matches

by David Y
Sun Nov 22, 2020 4:05 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: sigma bond
Replies: 8
Views: 282

Re: sigma bond

A sigma bond is between two differing orbitals and can rotate
by David Y
Sun Nov 22, 2020 4:02 pm
Forum: Dipole Moments
Topic: Polarity
Replies: 14
Views: 49

Re: Polarity

The dipoles can cancel each other out in the compound
by David Y
Sun Nov 22, 2020 4:00 pm
Forum: Coordinate Covalent Bonds
Topic: What is a coordinate Covalent Bond
Replies: 11
Views: 35

Re: What is a coordinate Covalent Bond

Bond between Lewis acid and base
by David Y
Sun Nov 22, 2020 3:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair E-
Replies: 37
Views: 126

Re: Lone Pair E-

Yes a lone pair is considered a region of electron density
by David Y
Sun Nov 22, 2020 3:56 pm
Forum: Hybridization
Topic: Pi and Sigma Bonds
Replies: 10
Views: 54

Re: Pi and Sigma Bonds

It is sigma first and then for double bond would be sigma pi as covalent bonds
by David Y
Sun Nov 22, 2020 3:54 pm
Forum: Resonance in Organic Compounds
Topic: Resonance
Replies: 3
Views: 4329

Re: Resonance

Yes as long as you create a correct Lewis Structure for the compound that has the lowest possible formal charge
by David Y
Sun Nov 15, 2020 3:18 pm
Forum: Ionic & Covalent Bonds
Topic: orbitals vs subshells
Replies: 6
Views: 31

Re: orbitals vs subshells

s, p, d, and f are subshells that each have orbitals. s has 1 orbital, p has 3 orbitals, d has 5 orbitals, and f has 7 orbitals. Each orbital can hold up to two electrons with opposing spins.
by David Y
Sun Nov 15, 2020 3:16 pm
Forum: Ionic & Covalent Bonds
Topic: London Dispersion Forces
Replies: 11
Views: 43

Re: London Dispersion Forces

All molecules have them, but the bigger the atom's size, the stronger the force
by David Y
Sun Nov 15, 2020 3:14 pm
Forum: Ionic & Covalent Bonds
Topic: Electronegativity difference
Replies: 12
Views: 44

Re: Electronegativity difference

Between .4 and 2 are dipoles
by David Y
Sun Nov 08, 2020 5:25 pm
Forum: Trends in The Periodic Table
Topic: Nuclear Charge
Replies: 7
Views: 36

Re: Nuclear Charge

nuclear charge is the pull of the nucleus
by David Y
Sun Nov 08, 2020 5:24 pm
Forum: Trends in The Periodic Table
Topic: # of electrons
Replies: 23
Views: 81

Re: # of electrons

number of valence electrons is based on the columns starting with left side column 1 of Hydrogen and they hace 1 valence eletron and so on for the other columns. column #= valence electron #
by David Y
Sat Oct 31, 2020 5:45 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 30
Views: 330

Re: Atomic Radius

when you add electors the radius increases
by David Y
Sat Oct 31, 2020 5:44 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Sapling Question on number of electrons
Replies: 6
Views: 67

Re: Sapling Question on number of electrons

only one electron can have a certain amount of quantum numbers
by David Y
Sat Oct 31, 2020 5:43 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Clarification on ml quantum number
Replies: 7
Views: 60

Re: Clarification on ml quantum number

it refers to the angular momentum quantum number
by David Y
Sat Oct 31, 2020 5:42 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shape of Orbitals
Replies: 8
Views: 43

Re: Shape of Orbitals

l describes the shape
by David Y
Sat Oct 31, 2020 5:42 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d orbitals
Replies: 17
Views: 65

Re: d orbitals

5 orbitals can hold maximum 10 electrons
by David Y
Sat Oct 31, 2020 5:41 pm
Forum: Quantum Numbers and The H-Atom
Topic: Nodal Planes
Replies: 10
Views: 59

Re: Nodal Planes

the s-orbital is an exception in this case I am pretty sure
by David Y
Sat Oct 31, 2020 5:40 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 9
Views: 30

Re: Ionization Energy

This helped a lot thank you! Is this always the case?
by David Y
Sat Oct 31, 2020 5:39 pm
Forum: Trends in The Periodic Table
Topic: Periodic Table & Electron Affinity
Replies: 11
Views: 39

Re: Periodic Table & Electron Affinity

increases across a period and decreased down a group
by David Y
Sat Oct 31, 2020 5:38 pm
Forum: Octet Exceptions
Topic: Octet Exceptions
Replies: 10
Views: 36

Re: Octet Exceptions

The exceptions are due to the valence electrons and orbitals that they occupy
by David Y
Sat Oct 31, 2020 5:36 pm
Forum: Ionic & Covalent Bonds
Topic: Is ionic or covalent stronger?
Replies: 31
Views: 327

Re: Is ionic or covalent stronger?

I think it depends on the situation, but I have heard ionic are stronger
by David Y
Thu Oct 22, 2020 5:49 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 402

Re: Periodic Table

We will be given constants, periodic table, and the equations accordingly for the test.
by David Y
Thu Oct 22, 2020 5:48 pm
Forum: Balancing Chemical Reactions
Topic: Writing Equations
Replies: 8
Views: 60

Re: Writing Equations

This clarification helped a lot thank you very much!
by David Y
Thu Oct 22, 2020 5:47 pm
Forum: Limiting Reactant Calculations
Topic: Double Check my Understanding
Replies: 10
Views: 105

Re: Double Check my Understanding

You are correct, you do not want to multiply the molar masses by the coefficients.
by David Y
Thu Oct 22, 2020 5:46 pm
Forum: Limiting Reactant Calculations
Topic: General Limiting Question
Replies: 6
Views: 39

Re: General Limiting Question

Yes the limiting reactant determines the most of the reactants that can be used to form product before running out. So, the product will be determined by the limiting reactant.
by David Y
Thu Oct 22, 2020 5:45 pm
Forum: Limiting Reactant Calculations
Topic: Theoretical Yield
Replies: 12
Views: 54

Re: Theoretical Yield

I think it would want a mass, so in grams for the final answer.
by David Y
Thu Oct 22, 2020 5:44 pm
Forum: DeBroglie Equation
Topic: DeBroglie Importance
Replies: 8
Views: 72

Re: DeBroglie Importance

I found it very interesting how it was proven that electrons have wave-like properties and how this sets up the atomic model.
by David Y
Thu Oct 22, 2020 5:41 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 196
Views: 815

Re: How are you studying?

I have been doing all of the practice textbook problems that Professor Lavelle has posted as they are a good review of each topic and section that will be on the midterm.
by David Y
Fri Oct 09, 2020 4:02 pm
Forum: Empirical & Molecular Formulas
Topic: Writing Formula Order
Replies: 6
Views: 43

Re: Writing Formula Order

I think it is Carbon first, the Hydrogen and the rest after.
by David Y
Fri Oct 09, 2020 4:01 pm
Forum: Significant Figures
Topic: Sig Fig usage on exams
Replies: 11
Views: 101

Re: Sig Fig usage on exams

To be safe, I think it is smart to ensure you put the correct sig figs in your answer.
by David Y
Fri Oct 09, 2020 4:00 pm
Forum: Balancing Chemical Reactions
Topic: How moles should be balanced on each side
Replies: 11
Views: 61

Re: How moles should be balanced on each side

The coefficients determine the molar ratio on each side of the equation for both reactants and products.
by David Y
Fri Oct 09, 2020 3:58 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Rounding with basic calculator
Replies: 16
Views: 412

Re: Rounding with basic calculator

Yes I would like to add to always make sue you check to ensure you put correct amount of significant figures.
by David Y
Fri Oct 09, 2020 3:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 75
Views: 72406

Re: Tutoring? [ENDORSED]

Thank you for these resources and extra help. I very much appreciate it and will look into these.
by David Y
Fri Oct 09, 2020 3:53 pm
Forum: SI Units, Unit Conversions
Topic: Fundamental L.37
Replies: 2
Views: 44

Fundamental L.37

L.37 is a little confusing and I would love some help working out the problem :)
by David Y
Fri Oct 09, 2020 3:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 188
Views: 13852

Re: Advice from a Medical Student - Part II [ENDORSED]

Thank you so much for your post about Medical School and Chem 14A. It is great to hear that the concepts we learn in class come to life in the real world like hospitals. I am excited to apply these concepts when I am in medical school.

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