Search found 35 matches

by Mehreen 2H
Sun Nov 22, 2020 11:45 pm
Forum: Bronsted Acids & Bases
Topic: Hydrogen Bonding
Replies: 15
Views: 248

Re: Hydrogen Bonding

No, it is a type of intermolecular force.
by Mehreen 2H
Sun Nov 22, 2020 11:44 pm
Forum: Student Social/Study Group
Topic: Study Tips for Final Exam
Replies: 56
Views: 212

Re: Study Tips for Final Exam

I would practice the textbook questions that are recommended and attend the UA workshops. They do really good review and cover the topics pretty well.
by Mehreen 2H
Sun Nov 22, 2020 11:41 pm
Forum: General Science Questions
Topic: Finals
Replies: 28
Views: 210

Re: Finals

The final is cumulative and multiple choice. Hope this helps!
by Mehreen 2H
Sun Nov 22, 2020 11:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Thanksgiving
Replies: 26
Views: 95

Re: Thanksgiving

Discussion sections will probably be canceled but he might post a prerecorded lecture like he did on Veteran's Day.
by Mehreen 2H
Sun Nov 22, 2020 11:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Scores
Replies: 28
Views: 132

Re: Midterm 2 Scores

They usually take around a week but I would be patient given the holiday!
by Mehreen 2H
Sun Nov 15, 2020 11:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8219
Views: 1434387

Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much?
They're cheaper than day rates.
by Mehreen 2H
Sun Nov 15, 2020 11:50 pm
Forum: Electronegativity
Topic: determining electronegativity
Replies: 30
Views: 211

Re: determining electronegativity

You will not need to know the specific calculations of electronegativity and if you do, they will be given to you. Just know the general trend of electronegativity and it is similar to ionization energy as mentioned in the lecture. The electronegativity of atoms increases as you move from left to ri...
by Mehreen 2H
Sun Nov 15, 2020 11:48 pm
Forum: Lewis Structures
Topic: Hydrogen Bonding
Replies: 12
Views: 25

Re: Hydrogen Bonding

Hydrogen bonds are the attraction between a hydrogen atom and an oxygen, nitrogen, or fluorine atom (the most electronegative elements).
by Mehreen 2H
Sun Nov 15, 2020 11:42 pm
Forum: Electronegativity
Topic: Sapling #14
Replies: 10
Views: 45

Re: Sapling #14

Hydrogen bonds only with the three most electronegative atoms: Oxygen, Nitrogen, and Fluorine. Hope this helps :)
by Mehreen 2H
Sun Nov 15, 2020 11:40 pm
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 70
Views: 236

Re: Is c always the speed of light?

C will always be the speed of light :)
by Mehreen 2H
Sun Nov 08, 2020 11:53 pm
Forum: Quantum Numbers and The H-Atom
Topic: Are there subshells past f?
Replies: 28
Views: 108

Re: Are there subshells past f?

There are subshells past f but we do not need to know them for this class! I'm pretty sure we only work with s,p, and d subshells. Hope this helps!
by Mehreen 2H
Sun Nov 08, 2020 11:51 pm
Forum: Resonance Structures
Topic: Valence Electrons
Replies: 28
Views: 95

Re: Valence Electrons

The columns of the periodic table will help you calculate the number of valence electrons, and this only applies for the s and p orbitals not the d block.
by Mehreen 2H
Sun Nov 08, 2020 11:18 pm
Forum: Student Social/Study Group
Topic: Class grade
Replies: 18
Views: 89

Re: Class grade

I'm pretty sure it should be under your study list on myUCLA where you signed up for the class. Hope this helps!
by Mehreen 2H
Sun Nov 08, 2020 11:17 pm
Forum: Student Social/Study Group
Topic: Veterans Day
Replies: 16
Views: 109

Re: Veterans Day

I'm pretty sure its treated just like a regular holiday so all classes and discussions are canceled. Hope this helps!
by Mehreen 2H
Sun Nov 08, 2020 11:15 pm
Forum: SI Units, Unit Conversions
Topic: conversion factors
Replies: 8
Views: 43

Re: conversion factors

I would say to just familiarize yourself with the ones on the formula sheet and just try to get a general idea of the meter conversions (nanometer and picometer, etc.).
by Mehreen 2H
Sun Nov 01, 2020 11:56 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Ions
Replies: 8
Views: 37

Re: Ions

It can be either!
by Mehreen 2H
Sun Nov 01, 2020 11:44 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 97
Views: 374

Re: How to relax

I like to listen to music and facetime my friends to catch up! It's really hard to socially interact with the pandemic going on and face timing and playing games online with your friends really helps!
by Mehreen 2H
Sun Nov 01, 2020 11:41 pm
Forum: Trends in The Periodic Table
Topic: studying
Replies: 12
Views: 30

Re: studying

I feel like the post-assessment modules after the audiovisual focus videos really helped! UA workshops are helpful as well and overall just doing more practice problems!
by Mehreen 2H
Sun Nov 01, 2020 11:39 pm
Forum: Student Social/Study Group
Topic: Halloween!!!
Replies: 54
Views: 220

Re: Halloween!!!

I watched a movie with my sister and drove around at night just to see decorated houses!
by Mehreen 2H
Sun Nov 01, 2020 11:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Scores
Replies: 28
Views: 250

Re: Midterm Scores

I heard someone say they are going through each exam so it might end up taking a while but nothing has specifically been said.
by Mehreen 2H
Sun Oct 25, 2020 11:55 pm
Forum: *Black Body Radiation
Topic: Info for Midterm
Replies: 12
Views: 351

Re: Info for Midterm

Black body will not be tested on the midterm.
by Mehreen 2H
Sun Oct 25, 2020 11:54 pm
Forum: DeBroglie Equation
Topic: Any tips for using a TI-83 Calculator?
Replies: 4
Views: 19

Re: Any tips for using a TI-83 Calculator?

In addition to everything said above, maybe try using sig figs instead of continuing with the "ans" function.
by Mehreen 2H
Sun Oct 25, 2020 11:52 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 406

Re: Periodic Table

Hi! We can print off the periodic table and the equation sheet off the chem website and you do not have to memorize them.
by Mehreen 2H
Sun Oct 25, 2020 9:12 pm
Forum: DeBroglie Equation
Topic: Derivation of Equations on Midterm?
Replies: 17
Views: 87

Re: Derivation of Equations on Midterm?

I don't think you have to worry about deriving equations! The midterm is all multiple choice.
by Mehreen 2H
Sun Oct 25, 2020 9:10 pm
Forum: Student Social/Study Group
Topic: Midterm Prep
Replies: 10
Views: 39

Re: Midterm Prep

I heard step-up session really help! Practice problems and going over the outlines should be good too.
by Mehreen 2H
Sun Oct 18, 2020 11:47 pm
Forum: Properties of Electrons
Topic: Sapling 2 HW #6
Replies: 10
Views: 125

Re: Sapling 2 HW #6

I'm not sure about the second part but for the first part since the ground state of a hydrogen atom would be n=1 you would just subtract the highest energy level (5) but the ground state (1) to get the number of spectral lines.
by Mehreen 2H
Sun Oct 18, 2020 11:40 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 92
Views: 1934

Re: Advice for studying

I heard the step up sessions are extremely helpful! During the lectures, I tend to pause a lot and take notes to really understand and if there is an example I will attempt it beforehand.
by Mehreen 2H
Sun Oct 18, 2020 11:38 pm
Forum: Ionic & Covalent Bonds
Topic: Nonpolar and polar
Replies: 16
Views: 228

Re: Nonpolar and polar

If the difference in electronegativity for the atoms in a bond is greater than 0.4, the bond is considered. If the difference in electronegativity is less than 0.4, the bond is essentially nonpolar. Sometimes you can tell from drawing out the molecule and looking at the charges and if its evenly spr...
by Mehreen 2H
Sun Oct 18, 2020 11:33 pm
Forum: Photoelectric Effect
Topic: Sapling clarification
Replies: 15
Views: 94

Re: Sapling clarification

The sapling homework is a combination of weeks 2,3, and 4. It won't be due until the Sunday of week four, hope this helps!
by Mehreen 2H
Sun Oct 18, 2020 9:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Discussion Mandatory?
Replies: 4
Views: 23

Re: Discussion Mandatory?

No, I believe they are not mandatory but they are super helpful! The problems that we go over are similar to the ones that we get for homework on sapling and they really clear things up.
by Mehreen 2H
Fri Oct 09, 2020 6:38 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molar Mass Stated in Sapling HW
Replies: 10
Views: 62

Re: Molar Mass Stated in Sapling HW

Hi!! When I first read this it threw me off a little as well. The plus/minus symbol tells you that the mass can range from 110-10 (100 grams) to 110+10 (120 grams). This will help you find the molecular formula at the end! Have a nice day!
by Mehreen 2H
Fri Oct 09, 2020 6:34 pm
Forum: Empirical & Molecular Formulas
Topic: Fundamental Question E.9
Replies: 4
Views: 54

Re: Fundamental Question E.9

I had a question about this question. At this point in the class, are we suppose to be able to come up with the formula for magnesium sulfate heptahydrate on our own? I had to google it/check the forum because I'm a little rusty on writing molecular formulas from their written out state. I do not t...
by Mehreen 2H
Fri Oct 09, 2020 6:28 pm
Forum: Molarity, Solutions, Dilutions
Topic: sapling hw #7
Replies: 17
Views: 133

Re: sapling hw #7

Hi! For this problem, it says that 32.0% of the mixture is calcium chloride and the total mass of the mixture is 310.1 g with the water. First, you have to find the amount of calcium chloride in the solution so you would multiply 310.1 g by .32 to get that the mass of CaCl2 is 99.2 g. The remainder ...
by Mehreen 2H
Fri Oct 09, 2020 6:19 pm
Forum: Molarity, Solutions, Dilutions
Topic: What does mmol stand for?
Replies: 30
Views: 241

Re: What does mmol stand for?

mmol stands for a millimole which is a thousandth of a mole. To convert moles to millimoles, multiply by 1000; to convert millimoles to moles, divide by 1000.
by Mehreen 2H
Fri Oct 09, 2020 3:25 pm
Forum: Molarity, Solutions, Dilutions
Topic: Week 1 HW Q#10
Replies: 5
Views: 52

Re: Week 1 HW Q#10

The hydrogen on the products side in the 3-methyl-3-hexanol come from the hydrogen in thhe 2-butanone and the 1-bromopropane. For this problem, my TA said you can just search up the molar masses for the compouds since we are not given the formulas and we aren't expected to know them since we haven't...

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