Search found 50 matches

by Victoria Otuya 4F
Wed Dec 04, 2019 9:58 pm
Forum: Air Pollution & Acid Rain
Topic: Final
Replies: 8
Views: 484

Re: Final

sarahsalama1G wrote:Where can I find the acid rain problems in the textbook?

I think Pages 490-491 in the 7th Edition would have some problems below the concepts and explanation.
by Victoria Otuya 4F
Wed Dec 04, 2019 9:55 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Molecules combining with water
Replies: 5
Views: 84

Re: Molecules combining with water

Can someone show me the trend in which some of the elements in the periodic table affect the ph of the solution? I remember professor Lavelle stating something about that.
by Victoria Otuya 4F
Wed Dec 04, 2019 9:53 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Resonance Hybrid
Replies: 4
Views: 54

Re: Resonance Hybrid

So if it doesn't have resonance the acid is automatically weaker?
by Victoria Otuya 4F
Wed Dec 04, 2019 9:51 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strong vs Weak Acids and H atoms
Replies: 2
Views: 46

Re: Strong vs Weak Acids and H atoms

How do you determine when an acid is strong or weak?
by Victoria Otuya 4F
Wed Dec 04, 2019 9:50 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Definition of Acid
Replies: 4
Views: 55

Re: Definition of Acid

I am a bit confused on the concept of acid and base. Can someone tell me the difference between both?
by Victoria Otuya 4F
Sat Nov 30, 2019 11:18 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Explain VSEPR conceptually
Replies: 12
Views: 129

Re: Explain VSEPR conceptually

Also the formula is very helpful (AXE) with determining the shape of the molecule.
by Victoria Otuya 4F
Sat Nov 30, 2019 11:16 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Polarity
Replies: 10
Views: 105

Re: Determining Polarity

So if there are lone pairs , the molecule as a whole is always polar right?
by Victoria Otuya 4F
Sat Nov 30, 2019 11:12 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw Shape
Replies: 12
Views: 122

Re: Seesaw Shape

is the seesaw the most complexed shape?
by Victoria Otuya 4F
Sat Nov 30, 2019 11:09 am
Forum: Hybridization
Topic: Pi vs Sigma Bonds
Replies: 10
Views: 77

Re: Pi vs Sigma Bonds

Are sigma single bonds, and pi double bonds? I am confused on how to count those bonds?
by Victoria Otuya 4F
Fri Nov 22, 2019 6:53 pm
Forum: Naming
Topic: Oxidation Number
Replies: 4
Views: 270

Re: Oxidation Number

What does Oxidation mean?
by Victoria Otuya 4F
Fri Nov 22, 2019 6:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone pairs
Replies: 13
Views: 95

Re: Lone pairs

So the lone pairs makes up the shape of a molecule and it is also known to have an electron density. But why is it that it is counted as an electron density if its a lone pair?
by Victoria Otuya 4F
Fri Nov 22, 2019 6:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE Format
Replies: 34
Views: 220

Re: AXE Format

I think its good to write just the E if it has one lone pair. If there is no lone pair, then the E shouldn't be placed on the formula.
by Victoria Otuya 4F
Fri Nov 22, 2019 6:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle of bent
Replies: 17
Views: 139

Re: Bond Angle of bent

But doesn't it depend on the lone pears that the molecule has which gives its shape.
by Victoria Otuya 4F
Fri Nov 22, 2019 6:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polar vs non polar
Replies: 6
Views: 67

Re: polar vs non polar

Does a non-polar molecule mean it has a Dipole-Dipole intermolecular force?
by Victoria Otuya 4F
Fri Nov 22, 2019 6:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bent v. angular
Replies: 20
Views: 334

Re: bent v. angular

But which one is more preferable to say? Bent or angular? Because I mostly see bent.
by Victoria Otuya 4F
Wed Nov 13, 2019 8:18 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 15
Views: 200

Re: Test 2

I think Test 2 is going to be about the topics after the chapter of chemical bond.
by Victoria Otuya 4F
Wed Nov 13, 2019 8:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Methane VSEPR
Replies: 7
Views: 77

Re: Methane VSEPR

Matt Sanruk 4F wrote:Where did they get the number 109.5 from?

I think they got the number from experimental observation and calculations.
by Victoria Otuya 4F
Wed Nov 13, 2019 8:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Memorizing and Recognizing Molecular Shapes
Replies: 4
Views: 44

Re: Memorizing and Recognizing Molecular Shapes

I think we won't have to memorize the complex structures of the molecular shapes. But for the ones we went over during lecture and in the book, I think it would be best to know them.
by Victoria Otuya 4F
Wed Nov 13, 2019 7:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: molecular shape
Replies: 8
Views: 76

Re: molecular shape

So first drawing the lewis structure can help, next is counting the bonds and lone pairs on the central atom, and then assigning the electron arrangement and lastly is identifying the shape considering only atoms.
by Victoria Otuya 4F
Wed Nov 13, 2019 7:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shape
Replies: 8
Views: 66

Re: Shape

But when reading pg. 108 of the chemistry book, it does state that lone pairs and bonds are considered when identifying the shape of a molecule. So it changes the structure.
by Victoria Otuya 4F
Thu Nov 07, 2019 9:19 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Equation?
Replies: 12
Views: 75

Re: Formal Charge Equation?

I learned an easier way to remember the formal charge equation: valence electron -(dots + line).
by Victoria Otuya 4F
Thu Nov 07, 2019 9:13 pm
Forum: Lewis Structures
Topic: Does the shape that I draw the Lewis structure matter?
Replies: 14
Views: 110

Re: Does the shape that I draw the Lewis structure matter?

It matters later in the chemistry 14 series but as of now, my peer learning facilitator said its fine as it is without drawing the shape.
by Victoria Otuya 4F
Thu Nov 07, 2019 9:10 pm
Forum: Lewis Structures
Topic: Oxygen
Replies: 8
Views: 68

Re: Oxygen

what about the ionization energy of nitrogen? Is It greater than oxygen?
by Victoria Otuya 4F
Thu Nov 07, 2019 9:07 pm
Forum: Resonance Structures
Topic: resonance importance?
Replies: 7
Views: 84

Re: resonance importance?

Why is it important to draw the resonance structure?
by Victoria Otuya 4F
Thu Nov 07, 2019 9:05 pm
Forum: Octet Exceptions
Topic: Octet Rule exceptions
Replies: 14
Views: 272

Re: Octet Rule exceptions

Why is it that H, He, Li, Be, B, and Al will never be a full octet?
by Victoria Otuya 4F
Thu Oct 31, 2019 10:08 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons?
Replies: 15
Views: 141

Re: Valence Electrons?

IreneGi4C wrote:I found this chart on the Internet, and I think it will help you a lot!

what about the transition metals? How would we determine the valence electrons?
by Victoria Otuya 4F
Thu Oct 31, 2019 10:04 pm
Forum: Ionic & Covalent Bonds
Topic: Radicals
Replies: 9
Views: 83

Re: Radicals

I was taught that the radicals are when a molecule or an atom contains one unpaired electron. For example HF.
by Victoria Otuya 4F
Thu Oct 31, 2019 9:56 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm
Replies: 28
Views: 284

Re: Midterm

Would the midterm also be based on the Fundamentals as well since it was just a review of High school chemistry?
by Victoria Otuya 4F
Thu Oct 31, 2019 9:54 pm
Forum: Ionic & Covalent Bonds
Topic: Format of midterm?
Replies: 12
Views: 104

Re: Format of midterm?

Leslie Magana 4C wrote:Are the midterms graded by our specific TAs like for the tests?

I am pretty sure, even though we are separated from our last name to the lectures we have. But I think it would be graded by our TA's.
by Victoria Otuya 4F
Thu Oct 31, 2019 9:52 pm
Forum: Ionic & Covalent Bonds
Topic: 2A 1
Replies: 5
Views: 55

Re: 2A 1

I learned that the row from Hydrogen to Francium has 1 valence electron. Then the second row from Beryllium to Radium has two valence electrons. Then skipping over to the row from Boron to Nihonium has 3 valence electrons and it goes on to the last row from Helium to Oganesson with a valence electro...
by Victoria Otuya 4F
Tue Oct 22, 2019 11:08 pm
Forum: Trends in The Periodic Table
Topic: Periodic Trend Exceptions
Replies: 7
Views: 74

Re: Periodic Trend Exceptions

The two exceptions that Lavelle talked through in Lecture was Copper and Chromium. There might be more underneath those elements.
by Victoria Otuya 4F
Tue Oct 22, 2019 11:01 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s, p, d, f orbitals
Replies: 15
Views: 165

Re: s, p, d, f orbitals

A question I do have is that when reviewing the notes in Lecture, it states that 4s, 4p has higher energy than 1s, 2s,2p, 3s,3p, and 3d. So I am quite confused and perplexed on how the orbitals work.
by Victoria Otuya 4F
Tue Oct 22, 2019 10:53 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s, p, d, f orbitals
Replies: 15
Views: 165

Re: s, p, d, f orbitals

The 4s orbital has lower energy than the 3d orbital because it is filled up first than the 3d level. when writing it down, its recommended to write it in the format of s,p,d,f. That's what I was taught.
by Victoria Otuya 4F
Tue Oct 22, 2019 10:43 pm
Forum: Photoelectric Effect
Topic: 1B.3
Replies: 3
Views: 67

Re: 1B.3

I think it's also D because in the readings above, it stated that the photoelectric pic effect strongly supports the view that electromagnetic radiation consists of photons that behave like particles.
by Victoria Otuya 4F
Tue Oct 22, 2019 10:29 pm
Forum: DeBroglie Equation
Topic: 1B.9 HW Question
Replies: 8
Views: 121

Re: 1B.9 HW Question

How did you get the total energy of 64J? I am really confused. Is it by multiplying 32 by 2 seconds?
by Victoria Otuya 4F
Thu Oct 17, 2019 3:39 am
Forum: DeBroglie Equation
Topic: Diffraction Patterns
Replies: 5
Views: 61

Re: Diffraction Patterns

what is the difference between constructive and destructive interference?
by Victoria Otuya 4F
Thu Oct 17, 2019 3:35 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 4
Views: 87

Re: Orbitals

How do orbitals work and what does s-, p-,d-, and f- mean?
by Victoria Otuya 4F
Thu Oct 17, 2019 3:32 am
Forum: Trends in The Periodic Table
Topic: Atomic vs ionic radius
Replies: 6
Views: 405

Re: Atomic vs ionic radius

The atomic and ionic radius are the same but If the atom loses its outermost electron, it is smaller than the atomic radius because the atom loses an electron energy shell.
by Victoria Otuya 4F
Thu Oct 17, 2019 3:29 am
Forum: Trends in The Periodic Table
Topic: Chemistry Community
Replies: 8
Views: 119

Re: Chemistry Community

It shows on your profile how many posts you have made and it helps to always write them down as well just as a back up.
by Victoria Otuya 4F
Thu Oct 17, 2019 3:22 am
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 392

Re: What are the units of hertz

Is hz the same as s-1?
by Victoria Otuya 4F
Wed Oct 09, 2019 1:01 am
Forum: Balancing Chemical Reactions
Topic: Fractions
Replies: 20
Views: 438

Re: Fractions

Dr.Lavelle states it's better that the fractions are left in whole numbers when balancing equations. Since he prefers it that way, I think it is better to keep the habit of doing it often when it comes down to fractions in a chemical equation.
by Victoria Otuya 4F
Wed Oct 09, 2019 12:53 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: sig figs
Replies: 20
Views: 256

Re: sig figs

Zeros are not considered a sig fig if it is in front of a decimal. For example, 0.245. Since the zero is in front of the decimal, it would not be counted as a sig fig. So in response the sig fig would be three. If it is still confusing, the link below explains it better than I do. https://youtu.be/I...
by Victoria Otuya 4F
Wed Oct 09, 2019 12:43 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Mole help [ENDORSED]
Replies: 8
Views: 127

Re: Mole help [ENDORSED]

Is it true that when you want to change mass to moles, you use the conversion: mass multiply by 1 mole and divide by the total atomic mass of the element?
by Victoria Otuya 4F
Wed Oct 09, 2019 12:37 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Wrong Textbook
Replies: 12
Views: 371

Re: Wrong Textbook

I have the pdf version of the book if anyone needs it. I particularly like the pdf versions but the actual book is nice to have as well. Chemical Principles 7th Edition by Peter Atkins.pdf
by Victoria Otuya 4F
Wed Oct 09, 2019 12:29 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Homework for Week 2
Replies: 4
Views: 99

Re: Homework for Week 2

Patricia Cardenas wrote:Does anyone know what day our homework is due this week (10/7-10/11)? I can't remember if it's due on our discussion section or Friday.

From now on our homework is due the day of our discussion. We turn it in to our TA before class starts to get full credit
by Victoria Otuya 4F
Wed Oct 02, 2019 7:44 pm
Forum: Empirical & Molecular Formulas
Topic: Rounding [ENDORSED]
Replies: 12
Views: 169

Re: Rounding [ENDORSED]

I keep on seeing sig figs throughout this discussion. I am not knowledgeable about that term. Can someone explain to me what it means and how it helps with rounding?
by Victoria Otuya 4F
Wed Oct 02, 2019 7:38 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 3543

Re: How does grading for discussion posts work?

Are we supposed to post 3 or 5 times a week? Because the syllabus said "5 pts per week" for online discussion Yeah that's what I also read in the syllabus.I heard Professor Lavelle say during lecture either Friday or Monday that posting 5 times a week gets you the maximum 5 points for the...
by Victoria Otuya 4F
Wed Oct 02, 2019 7:28 pm
Forum: SI Units, Unit Conversions
Topic: Calculator Question
Replies: 13
Views: 235

Re: Calculator Question

Milisuryani Santoso 1L wrote:So just to make sure, if I have the TI-36X Pro scientific calculator, would that be alright for a test?

I have the same calculator. I did ask to make sure if its alright and the response was a yes because it is not a graphing calculator. So to answer your question, it is alright for a test.
by Victoria Otuya 4F
Wed Oct 02, 2019 7:22 pm
Forum: SI Units, Unit Conversions
Topic: Next Week's Test
Replies: 8
Views: 159

Re: Next Week's Test

The test is going to be on the Review of Chemical and Physical Principles ( aka review of High school chemistry) because it was the topic we reviewed this week. We also take the test the day of our discussion date ( if you have discussion on Thursday then it is on Thursday but if it is on Friday the...
by Victoria Otuya 4F
Wed Oct 02, 2019 7:08 pm
Forum: SI Units, Unit Conversions
Topic: Question about Showing Work
Replies: 22
Views: 338

Re: Question about Showing Work

I would show my work just in case because in a test or a quiz, the person grading or reviewing your answers would like to see the steps you took to answer the problem.

Go to advanced search