Search found 64 matches

by Rosa Munoz 2E
Sun Jan 19, 2020 7:18 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: small Ka
Replies: 5
Views: 14

Re: small Ka

if the ka is smaller than 10^3 than you may use the approximation but if percent dissociation is larger than 5% then you have to go back and use the quadratic equation
by Rosa Munoz 2E
Sun Jan 19, 2020 7:15 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Molar concentration of acids & bases
Replies: 8
Views: 15

Re: Molar concentration of acids & bases

molar concentration deals with molarity
by Rosa Munoz 2E
Sun Jan 19, 2020 5:27 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Problem 12.69
Replies: 6
Views: 426

Re: Problem 12.69

I am confused as well on why you can use the Kb value for NH3
by Rosa Munoz 2E
Sun Jan 19, 2020 5:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: conjugate seesaw
Replies: 4
Views: 13

Re: conjugate seesaw

Since it is equal to a constant, if one goes down, the other must go up.
by Rosa Munoz 2E
Sat Jan 18, 2020 6:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6D7
Replies: 1
Views: 14

6D7

Find the initial concentration of the weak acid or base in each of the following aqueous solutions: (a) a solution of HClO with pH 4.60; (b) a solution of hydrazine, NH2NH2, with pH 10.20. I looked at the solution manual and I am confused as to why (3.0x10^-8) appears twice (in the numerator and den...
by Rosa Munoz 2E
Sun Jan 12, 2020 1:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc vs Kp
Replies: 10
Views: 22

Re: Kc vs Kp

Kc uses concentrations. Kp uses partial pressures. The answers will not always be the same.
by Rosa Munoz 2E
Sun Jan 12, 2020 1:53 pm
Forum: Ideal Gases
Topic: Conditions for Ideal Gases
Replies: 5
Views: 33

Re: Conditions for Ideal Gases

The ideal gas law assumes: 1) no intermolecular forces, 2)no volume, 3)collisions are perfectly elastic (no kinetic energy is lost). These conditions are not realistic, thus why it is the "ideal" gas law.
by Rosa Munoz 2E
Sun Jan 12, 2020 1:49 pm
Forum: Ideal Gases
Topic: R in PV=nRT
Replies: 34
Views: 350

Re: R in PV=nRT

The R is a constant, you can find it on the equation sheet. Just pay attention to which unit of pressure they are using.
by Rosa Munoz 2E
Sun Jan 12, 2020 1:48 pm
Forum: Ideal Gases
Topic: Topics on Test 1
Replies: 36
Views: 149

Re: Topics on Test 1

Definitely chemical equilibrium+ whatever else we learn before the test. Ask your TA+Lavelle
by Rosa Munoz 2E
Sun Jan 12, 2020 1:46 pm
Forum: Ideal Gases
Topic: Bars vs atmospheres
Replies: 13
Views: 36

Re: Bars vs atmospheres

Both are applicable
by Rosa Munoz 2E
Sun Dec 08, 2019 10:15 pm
Forum: Student Social/Study Group
Topic: Class Grading
Replies: 35
Views: 488

Re: Class Grading

Hope there’s a curve!
by Rosa Munoz 2E
Sun Dec 01, 2019 9:29 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Use of Bronsted or Lewis Definitions
Replies: 7
Views: 39

Re: Use of Bronsted or Lewis Definitions

Bronsted is the commonly used one.
by Rosa Munoz 2E
Sun Dec 01, 2019 9:28 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: The pH Scale
Replies: 7
Views: 57

Re: The pH Scale

Just know the basics of how to calculate ph.
by Rosa Munoz 2E
Sun Dec 01, 2019 9:27 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Notes
Replies: 3
Views: 20

Re: Notes

He will go over some of the same things on Monday.
by Rosa Munoz 2E
Sun Dec 01, 2019 9:27 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Difference between weak acids/bases and strong acids/bases
Replies: 6
Views: 34

Re: Difference between weak acids/bases and strong acids/bases

Strong acids will have complete deprotonation and strong bases will go through complete protonation.
by Rosa Munoz 2E
Sun Dec 01, 2019 9:25 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Notes of November 25
Replies: 4
Views: 49

Re: Notes of November 25

Yeah! Where do you want me to send them to you?
by Rosa Munoz 2E
Sun Nov 24, 2019 8:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Representing larger molecules
Replies: 4
Views: 39

Re: Representing larger molecules

Look at the central atoms independently to determine shape.
by Rosa Munoz 2E
Sun Nov 24, 2019 8:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw
Replies: 23
Views: 124

Re: Seesaw

yes
by Rosa Munoz 2E
Sun Nov 24, 2019 8:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs linear
Replies: 56
Views: 284

Re: Bent vs linear

2 bonded pairs, 1 lone pair= bent. 2 bonded pairs, 2 lone pairs=bent.
by Rosa Munoz 2E
Sun Nov 24, 2019 8:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 14
Views: 109

Re: Test 2

VSEPR shapes, intermolecular forces+ how they relate to boiling point, sigma and pi bonds...
by Rosa Munoz 2E
Sun Nov 17, 2019 7:15 pm
Forum: General Science Questions
Topic: Test 2 Review
Replies: 8
Views: 96

Re: Test 2 Review

Everything after the midterm
by Rosa Munoz 2E
Sun Nov 17, 2019 7:14 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Influence of Lone Pair e- on Model
Replies: 5
Views: 37

Re: Influence of Lone Pair e- on Model

Lone-Lone pair PR is greater than the rest.
by Rosa Munoz 2E
Sun Nov 17, 2019 7:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shapes
Replies: 7
Views: 32

Re: Shapes

There are helpful videos on Youtube!
by Rosa Munoz 2E
Sat Nov 16, 2019 9:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Electronegativity
Replies: 5
Views: 35

Electronegativity

Should we memorize some of the common values of electronegativity?
by Rosa Munoz 2E
Sat Nov 16, 2019 9:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: What is VSPER
Replies: 14
Views: 145

Re: What is VSPER

VSEPR (valence shell electron pair repulsion)
by Rosa Munoz 2E
Sun Nov 10, 2019 7:05 pm
Forum: DeBroglie Equation
Topic: De Broglie Equation Derivation and Use
Replies: 7
Views: 44

Re: De Broglie Equation Derivation and Use

You don't have to know how to derive it.
by Rosa Munoz 2E
Sun Nov 10, 2019 7:04 pm
Forum: Resonance Structures
Topic: Formal charge and resonance
Replies: 5
Views: 57

Re: Formal charge and resonance

Resonance structures should have the same overall charge.
by Rosa Munoz 2E
Sun Nov 10, 2019 6:59 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate Covalent Bond
Replies: 8
Views: 54

Re: Coordinate Covalent Bond

A coordinate covalent bond is when an atom provides two electrons instead of one.
by Rosa Munoz 2E
Sun Nov 10, 2019 6:57 pm
Forum: Octet Exceptions
Topic: electron number in octet
Replies: 8
Views: 56

Re: electron number in octet

Depends on the certain element.
by Rosa Munoz 2E
Sun Nov 10, 2019 6:56 pm
Forum: Electronegativity
Topic: electronegativity values
Replies: 6
Views: 18

Re: electronegativity values

Make sure to know the trends.
by Rosa Munoz 2E
Sun Nov 10, 2019 6:55 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy
Replies: 5
Views: 37

Re: Ionization Energy

The elements closer to the noble gases have higher ionization energy.
by Rosa Munoz 2E
Sun Nov 03, 2019 11:35 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 58
Views: 727

Re: Study Tips

Watch YouTube videos and go through the homework problems.
by Rosa Munoz 2E
Sun Nov 03, 2019 10:37 pm
Forum: Properties of Light
Topic: p=mv
Replies: 4
Views: 28

Re: p=mv

Thanks!
by Rosa Munoz 2E
Sun Nov 03, 2019 10:36 pm
Forum: General Science Questions
Topic: Test Question
Replies: 8
Views: 117

Re: Test Question

Matt Sanruk 4F wrote:Any numerical value/constants will be given to us, correct?

The equation sheet we are given for the test is on the website.
by Rosa Munoz 2E
Sun Nov 03, 2019 9:11 pm
Forum: Lewis Structures
Topic: Atoms that can accept more than 8 Valence E-
Replies: 3
Views: 21

Re: Atoms that can accept more than 8 Valence E-

Because they have a d orbital
by Rosa Munoz 2E
Sun Nov 03, 2019 9:07 pm
Forum: Lewis Structures
Topic: Octet Rule
Replies: 6
Views: 40

Re: Octet Rule

Atoms are trying to have 8 electrons in their outer shell, giving it the same e- config as a noble gas.
by Rosa Munoz 2E
Sun Nov 03, 2019 7:43 pm
Forum: Administrative Questions and Class Announcements
Topic: 10/28 Updates due to Fire [ENDORSED]
Replies: 14
Views: 838

Re: 10/28 Updates due to Fire [ENDORSED]

If you go on the class website you can find the dates and times of the review sessions.
by Rosa Munoz 2E
Sun Nov 03, 2019 7:40 pm
Forum: Significant Figures
Topic: Sig figs on midterm
Replies: 5
Views: 66

Re: Sig figs on midterm

Yes, base your sig figs off of the given.
by Rosa Munoz 2E
Sun Oct 27, 2019 9:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Online Modules
Replies: 7
Views: 65

Re: Online Modules

I don't think he will posting any further modules.
by Rosa Munoz 2E
Sun Oct 27, 2019 9:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Powerpoint Slides
Replies: 5
Views: 43

Re: Powerpoint Slides

He does not post his slides.
by Rosa Munoz 2E
Sun Oct 27, 2019 8:03 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: p-orbitals
Replies: 11
Views: 40

Re: p-orbitals

You don't have to to use x,y,z.
by Rosa Munoz 2E
Sun Oct 27, 2019 6:34 pm
Forum: Lewis Structures
Topic: Video Modules
Replies: 11
Views: 87

Re: Video Modules

I don't think he'll post the slides nor more videos.
by Rosa Munoz 2E
Sun Oct 27, 2019 6:33 pm
Forum: Lewis Structures
Topic: 2B.7
Replies: 4
Views: 23

Re: 2B.7

Yes!
by Rosa Munoz 2E
Sun Oct 27, 2019 4:18 pm
Forum: Properties of Light
Topic: p=mv
Replies: 4
Views: 28

p=mv

What units belong to each variable in p=mv?
by Rosa Munoz 2E
Sun Oct 27, 2019 4:01 pm
Forum: Properties of Light
Topic: Hz vs. frequency
Replies: 7
Views: 75

Re: Hz vs. frequency

Hertz is the unit for frequency.
by Rosa Munoz 2E
Sun Oct 27, 2019 3:59 pm
Forum: Properties of Light
Topic: Value for C
Replies: 8
Views: 63

Re: Value for C

I usually use 3.0x10^8.
by Rosa Munoz 2E
Sun Oct 20, 2019 9:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Modules
Replies: 3
Views: 23

Re: Modules

It would be helpful if he posted more modules.
by Rosa Munoz 2E
Sun Oct 20, 2019 9:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1582

Re: Week 2 Homework Problems [ENDORSED]

Do whatever section we are covering in lecture. If he hasn't gone over it, don't do it.
by Rosa Munoz 2E
Sun Oct 20, 2019 8:58 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 2737

Re: Test 1 [ENDORSED]

You can go review your test during office hours.
by Rosa Munoz 2E
Sun Oct 20, 2019 5:33 pm
Forum: DeBroglie Equation
Topic: Wave properties module
Replies: 2
Views: 28

Wave properties module

Calculate the wavelength of a 275 kg single-seat electric car traveling at a speed of 125 km.hr-1. Do electric cars have wavelike properties?

Do we have to convert the speed to m*s^-1? If so, how do you do that?
by Rosa Munoz 2E
Sun Oct 20, 2019 4:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Atomic spectra module
Replies: 1
Views: 30

Atomic spectra module

n 1.0 s, a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat) of wavelength 1850 nm. What is the energy per photon of light emitted?
How many photons of infrared radiation does the lamp generate in 1.0 s?

Can someone explain the second part
by Rosa Munoz 2E
Sun Oct 20, 2019 4:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 20
Views: 787

Re: Accessing the E-textbook [ENDORSED]

If you purchase the E-textbook, you get access to additional resources.
by Rosa Munoz 2E
Sun Oct 13, 2019 9:00 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 5
Views: 44

Re: E=hv

The formula can be used to find the energy of light of a given frequency.
by Rosa Munoz 2E
Sun Oct 13, 2019 8:33 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 1610

Re: Rydberg equation [ENDORSED]

Now I am confused... in the textbook R is positive.
by Rosa Munoz 2E
Sun Oct 13, 2019 8:12 pm
Forum: Properties of Light
Topic: Helpful videos
Replies: 1
Views: 16

Helpful videos

Can anyone link me to helpful videos for the quantum section?
by Rosa Munoz 2E
Sun Oct 13, 2019 7:58 pm
Forum: *Black Body Radiation
Topic: Black Body Radiation
Replies: 12
Views: 109

Re: Black Body Radiation

Should we be familiar with the Stefan-Boltzmann law?
by Rosa Munoz 2E
Sun Oct 13, 2019 7:52 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 2737

Re: Test 1 [ENDORSED]

You might have to go to office hours to view your test.
by Rosa Munoz 2E
Sat Oct 12, 2019 11:13 pm
Forum: Properties of Light
Topic: Speed of Light
Replies: 41
Views: 899

Re: Speed of Light

It is a constant.
by Rosa Munoz 2E
Sat Oct 05, 2019 9:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Formatting homework
Replies: 12
Views: 152

Re: Formatting homework

You should always include your id number as well as section. Make sure to include which hw it is and for which class.
by Rosa Munoz 2E
Sat Oct 05, 2019 9:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1582

Re: Week 2 Homework Problems [ENDORSED]

He sent out an email earlier today. You can do problems from last week's section or the quantum one.
by Rosa Munoz 2E
Sat Oct 05, 2019 9:23 pm
Forum: SI Units, Unit Conversions
Topic: How many Sig Figs are necessary?
Replies: 4
Views: 65

Re: How many Sig Figs are necessary?

leading zeros do not count. There are a lot of good videos on youtube and khan academy.
by Rosa Munoz 2E
Fri Oct 04, 2019 3:45 pm
Forum: SI Units, Unit Conversions
Topic: Homework for Week 1
Replies: 16
Views: 257

Re: Homework for Week 1

From now on we turn in our homework during discussion and I think the posts are due Sunday :)
by Rosa Munoz 2E
Wed Oct 02, 2019 9:14 pm
Forum: Limiting Reactant Calculations
Topic: Module: limiting chemical reactions
Replies: 3
Views: 72

Module: limiting chemical reactions

Number 20 from limiting chemical reactions module. How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is: CaCO3(s) + H2SO4(aq) ---> CaSO4(s) + CO2(g) + H2O(l) Can someone explain the problem thoroug...

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