Search found 54 matches

by Ashley Osorio
Sat Dec 07, 2019 5:10 pm
Forum: Biological Examples
Topic: Vitamin B12
Replies: 1
Views: 43

Vitamin B12

What's the transition metal and ligands of it in vitamin B12?
by Ashley Osorio
Sat Dec 07, 2019 1:50 pm
Forum: Bronsted Acids & Bases
Topic: CHOOH
Replies: 1
Views: 52

CHOOH

Is there a specific reason why CHOOH or CH3COOH is written with two OO's and not O2??
by Ashley Osorio
Sat Dec 07, 2019 11:20 am
Forum: Hybridization
Topic: Ammonia
Replies: 4
Views: 123

Re: Ammonia

NH3 has 4 areas of electron density- three bonded regions and one region with a lone pair. Therefore, the hybridization is sp3.
by Ashley Osorio
Sat Dec 07, 2019 11:15 am
Forum: Administrative Questions and Class Announcements
Topic: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
Replies: 111
Views: 5033

Re: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]

How would one phrase number 36C?? Also, 36B is both Amphoteric and amphiprotic, right?
by Ashley Osorio
Fri Dec 06, 2019 1:40 pm
Forum: Lewis Structures
Topic: Oxoacids
Replies: 1
Views: 109

Oxoacids

Today, Lavelle explained how Oxoacids have to have their hydrogens bonded with an oxygen because that's how they're structured. Are there any similar rules to this??
by Ashley Osorio
Fri Dec 06, 2019 1:34 pm
Forum: Polyprotic Acids & Bases
Topic: Direction of Reaction of Polyprotic Acids
Replies: 2
Views: 66

Re: Direction of Reaction of Polyprotic Acids

Can you elaborate on that? What are we looking for when comparing the pH and pKa?
by Ashley Osorio
Fri Dec 06, 2019 1:09 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining Shape and Placement of atoms
Replies: 1
Views: 34

Determining Shape and Placement of atoms

When we are drawing a normal molecule, how do we know where each go? For example, for C5H5NO2, what stops me from bonding carbons to Oxygens only or to Hydrogens only. How do we determine the correct, biological order they are supposed to be in????
by Ashley Osorio
Fri Dec 06, 2019 1:03 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining polarity from VSPER
Replies: 4
Views: 148

Determining polarity from VSPER

How can we determine the polarity just from the VSPER formula?? Pls explain
by Ashley Osorio
Fri Dec 06, 2019 12:49 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong vs. weak acids and bases
Replies: 3
Views: 48

Re: Strong vs. weak acids and bases

Can someone explain why the trend makes sense with details?
by Ashley Osorio
Fri Dec 06, 2019 12:47 am
Forum: Lewis Structures
Topic: Bent or Angular?
Replies: 16
Views: 341

Re: Bent or Angular?

All the same.
by Ashley Osorio
Fri Dec 06, 2019 12:43 am
Forum: Sigma & Pi Bonds
Topic: Characteristics
Replies: 2
Views: 116

Characteristics

A while ago, Lavelle emphasized the fact that Sigma bonds allowed rotation while Pi bonds did not are were rigid. How is this relevant to now? How did it relate to what we learned after?
by Ashley Osorio
Fri Dec 06, 2019 12:41 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: what is a ligand?
Replies: 7
Views: 84

Re: what is a ligand?

So ligands only exist when talking about transition metals?
by Ashley Osorio
Fri Dec 06, 2019 12:40 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Formulas
Replies: 2
Views: 33

Re: VSEPR Formulas

Yes, it has a bent molecular shape. But its AX2E1
by Ashley Osorio
Fri Dec 06, 2019 12:37 am
Forum: Identifying Acidic & Basic Salts
Topic: Electrons and pH
Replies: 2
Views: 43

Re: Electrons and pH

Thanks!!
by Ashley Osorio
Fri Dec 06, 2019 12:26 am
Forum: Resonance Structures
Topic: localization
Replies: 1
Views: 103

Re: localization

I believe so. Since those with resonance structures are basically made up of all of those resonance structures, all electrons involved are delocalized.
by Ashley Osorio
Fri Dec 06, 2019 12:24 am
Forum: Bronsted Acids & Bases
Topic: Acidic Strength
Replies: 3
Views: 63

Re: Acidic Strength

Remember, electronegativity increases going up the periodic table. Since Cl is above Br, Cl is more electronegative.
by Ashley Osorio
Fri Dec 06, 2019 12:23 am
Forum: Identifying Acidic & Basic Salts
Topic: Electrons and pH
Replies: 2
Views: 43

Electrons and pH

NH3 is basic with an 11 pH. When an electron is added, creating NH4+, the pH decreased and it became more acidic. Why did adding an electron do this to the acidity?
by Ashley Osorio
Tue Dec 03, 2019 6:51 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong vs. Weak Acids and Bases
Replies: 4
Views: 51

Re: Strong vs. Weak Acids and Bases

What do you refer to when you say equilibrium constant?
by Ashley Osorio
Tue Dec 03, 2019 5:44 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Concentration
Replies: 2
Views: 27

Concentration

Why is the concentration of [H30+] the same as [H+]?
by Ashley Osorio
Tue Dec 03, 2019 12:15 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Strong Acids
Replies: 4
Views: 46

Re: Strong Acids

So because they (typically) completely dissolve in water, they have no Ka value. Can only strong acids do this then? Have no Ka value?
by Ashley Osorio
Tue Dec 03, 2019 12:09 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Anion stability
Replies: 6
Views: 92

Re: Anion stability

According to this website at https://employees.csbsju.edu/cschaller/Reactivity/mechreview/UMintermed.htm , The larger the atom, and the further the electrons from the nucleus, the more polarizable it is. The more polarizable the atom, the more stable the anion. Within a row of the periodic table, t...
by Ashley Osorio
Mon Dec 02, 2019 11:40 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelating complexes
Replies: 6
Views: 74

Re: Chelating complexes

Are there any exceptions to this??
by Ashley Osorio
Mon Dec 02, 2019 9:30 pm
Forum: Resonance Structures
Topic: Delocalization
Replies: 5
Views: 216

Delocalization

How can we tell the difference between a structure with localized electrons versus delocalized electrons?
by Ashley Osorio
Wed Nov 20, 2019 12:45 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Why is CBr2Cl2 polar?
Replies: 7
Views: 110

Re: Why is CBr2Cl2 polar?

Can someone further explain this? I still don't understand how this is polar. No matter where the two Cl remain within the tetrahedral shape, the dipoles won't face the same way, so how can it be polar? Or is any molecule polar as long as their dipoles don't cancel????
by Ashley Osorio
Mon Nov 18, 2019 6:56 pm
Forum: Sigma & Pi Bonds
Topic: HW Question 2.63
Replies: 1
Views: 44

Re: HW Question 2.63

In the problem, only two bonds are shown to be connected on either side of Oxygen. So, that means that Oxygen must have 2 lone pairs to complete its octet. So, its actual molecular shape is a bent tetrahedral whose angles are 109.5!
by Ashley Osorio
Mon Nov 18, 2019 6:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Component Orbitals of pi Bonds
Replies: 3
Views: 29

Re: Component Orbitals of pi Bonds

What does that mean?
by Ashley Osorio
Sun Nov 17, 2019 11:38 pm
Forum: Administrative Questions and Class Announcements
Topic: test 2
Replies: 7
Views: 115

Re: test 2

Nathan Rothschild_3D wrote:Does anyone know what page in the book has all of the shapes?

I think page 113 is a good start
by Ashley Osorio
Sun Nov 17, 2019 11:04 pm
Forum: Hybridization
Topic: Pi and Sigma Bonds
Replies: 17
Views: 490

Re: Pi and Sigma Bonds

205150314 wrote:why do we need to give bonds a secondary name? what do the names mean?

Yeah, why does it matter? It feels like they have no other significance other than giving bonds a new name.
by Ashley Osorio
Sun Nov 17, 2019 11:02 pm
Forum: Ionic & Covalent Bonds
Topic: Dispersion Forces
Replies: 2
Views: 47

Re: Dispersion Forces

The london forces between Br2 and I2 are stronger than in F2 and Cl2 because Br2 and I2 are bigger in size and have a higher polarizability. Remember, london forces are stronger when there is more surface area that it can interact with. Since Br2 and I2 have a stronger london force, it takes more en...
by Ashley Osorio
Sun Nov 17, 2019 10:51 pm
Forum: Trends in The Periodic Table
Topic: Trend for Polarizability
Replies: 6
Views: 164

Re: Trend for Polarizability

Think of polarizability as "How easily can this atom lose an electron". If it has high polarizability, it'll be really easy for it to lose an electron and vice versa. Bigger atoms have higher polarizability because the bigger an atom is, the more electrons they, and the more electrons they...
by Ashley Osorio
Tue Nov 12, 2019 11:51 pm
Forum: Dipole Moments
Topic: 3F.5
Replies: 6
Views: 88

Re: 3F.5

Yeah, doesn't ether also have H bonds? They're bonded to the carbon just as in Butanol, so what's the difference? Is it because unlike in Ether, theres a carbon bonded to an Oxygen? If so, why is this important??
by Ashley Osorio
Tue Nov 05, 2019 6:02 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability Periodic Trend
Replies: 5
Views: 71

Re: Polarizability Periodic Trend

@ Maddie, smaller radius makes an electron more polarizable because when the electron is smaller, the valence electrons are closer to the nucleus- it's harder to take them away from the atom. It's easier to take them away from an atom with a big radius because the valence electrons are shielded from...
by Ashley Osorio
Tue Nov 05, 2019 5:57 pm
Forum: DeBroglie Equation
Topic: Dino Nuggets 8C
Replies: 2
Views: 61

Re: Dino Nuggets 8C

oh my gosh you're right, thank you
by Ashley Osorio
Tue Nov 05, 2019 5:30 pm
Forum: DeBroglie Equation
Topic: Dino Nuggets 8C
Replies: 2
Views: 61

Dino Nuggets 8C

The answer for 8B was 6.78x1014 Hz and the next questions asks if the students can see it. Answer key says yes but how is that possible if it doesn't fall under the visible region??
by Ashley Osorio
Tue Nov 05, 2019 1:49 pm
Forum: Balancing Chemical Reactions
Topic: Balancing This Equation
Replies: 11
Views: 303

Re: Balancing This Equation

Since its a combustion, wouldn't it be C10H14N2+ O2--> N2
by Ashley Osorio
Tue Nov 05, 2019 1:48 pm
Forum: Balancing Chemical Reactions
Topic: Balancing This Equation
Replies: 11
Views: 303

Balancing This Equation

Write a balanced combustion reaction for solid nicotine (C10H14N2). (Hint: The reaction produces N2 gas). How can we balance it when both sides don't have Oxygen? Or does it? How are we supposed to figure this out?
by Ashley Osorio
Sun Nov 03, 2019 3:00 pm
Forum: Octet Exceptions
Topic: Expanded Orbitals Explain Pls
Replies: 1
Views: 41

Expanded Orbitals Explain Pls

When people ask how expanded octets happen, they keep saying that its because the p elements in the third period and on have a d orbital that can accommodate for more electrons. But I still don't understand why and how having a d orbital allows the 3p or higher elements to be able to accommodate mor...
by Ashley Osorio
Sun Nov 03, 2019 2:54 pm
Forum: Octet Exceptions
Topic: Identifying Radicals
Replies: 6
Views: 97

Identifying Radicals

How do we know when a molecule is meant to be a radical? Can someone give an example other than CH3?? Thank you :(

Also, I understand how radicals are an exception to the octet rule, but is that all their importance is tied to? Why are they important to know??
by Ashley Osorio
Sun Nov 03, 2019 1:35 am
Forum: Lewis Structures
Topic: Formal Charge for Lewis Structures
Replies: 4
Views: 61

Re: Formal Charge for Lewis Structures

Wait, when we get a bond with resonance, do we draw all the possible lewis structures AND their formal charges?? thats a lot haha
by Ashley Osorio
Sun Nov 03, 2019 12:54 am
Forum: Lewis Structures
Topic: central atom
Replies: 16
Views: 1445

Re: central atom

This excerpt from the book helped me a bit figuring this out. "If there is doubt, a good rule of thumb for molecules other than compounds of hydrogen is to choose as the central atom the element with the lowest ionization energy. This arrangement often results in the lowest energy because an at...
by Ashley Osorio
Mon Oct 28, 2019 11:09 pm
Forum: Ionic & Covalent Bonds
Topic: 2A.5
Replies: 4
Views: 64

Re: 2A.5

Do we always try to keep d full? When do we start taking away from d?
by Ashley Osorio
Sat Oct 26, 2019 5:23 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Factors In Multi-Electron Energy
Replies: 1
Views: 51

Factors In Multi-Electron Energy

Just to be sure: The big factors that affect a multi-electron's energy to keep in mind are their n and l values (because of electron probability distribution), their effective nuclear charge, & "shielding"/penetration. Is there something else I should also take into account?
by Ashley Osorio
Sat Oct 26, 2019 4:43 pm
Forum: Trends in The Periodic Table
Topic: Effective Nuclear Charge
Replies: 2
Views: 32

Re: Effective Nuclear Charge

If the equation is Zeff= Z-S, and s is the number of non-valence electrons, does that mean that s is basically just the atomic number minus the valence electrons?
so is zeff= atomic number- (atomic number-valence e)?
by Ashley Osorio
Sat Oct 26, 2019 3:43 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Assigning Orbitals to Elements
Replies: 4
Views: 68

Assigning Orbitals to Elements

How can we figure out which orbital corresponds to each element? Taking Sulfur, for example, which p orbital (px,py,pz) does it hold and how can we figure it out?
by Ashley Osorio
Sat Oct 26, 2019 2:53 pm
Forum: Quantum Numbers and The H-Atom
Topic: Determining Element
Replies: 4
Views: 60

Determining Element

How do we determine an element from the quantum numbers? I mean, without knowing where the element is on the periodic table, we can't figure out ml, can't we? So, is it possible?
by Ashley Osorio
Wed Oct 23, 2019 1:56 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 1D.23
Replies: 2
Views: 64

Re: 1D.23

We focus on the l values here. For a, since l=1, that means ml can be -1,0, or 1. That's a total of three values, so it has 3 orbitals (this applies to c as well). However, I'm actually lost as how to solve b and d. Does the fact that we have an ml value change the number of orbitals, or does it sti...
by Ashley Osorio
Sat Oct 19, 2019 9:53 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Inner e- and Outer e-
Replies: 14
Views: 133

Re: Inner e- and Outer e-

I understand the result from their position, but what does that have to do with anything? What does it affect??
by Ashley Osorio
Sat Oct 19, 2019 9:34 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Letter Names
Replies: 4
Views: 68

Re: Letter Names

We use spdf in order to make up their orbital configurations.
by Ashley Osorio
Sat Oct 19, 2019 9:31 pm
Forum: Photoelectric Effect
Topic: E = pc vs E= mv^2/2
Replies: 2
Views: 39

Re: E = pc vs E= mv^2/2

It al depends on the information you have before hand and what you're trying to find.
by Ashley Osorio
Tue Oct 15, 2019 6:06 pm
Forum: *Black Body Radiation
Topic: What is Black Body?
Replies: 35
Views: 431

Re: What is Black Body?

From my understanding, black bodies is a misleading name because they're actually glowing white from how hot they are. Basically, they do absorb all wavelengths, but they don't reflect light, they radiate it. The amount of light emitted then depends on the temperature of the object being heated.
by Ashley Osorio
Tue Oct 15, 2019 6:00 pm
Forum: DeBroglie Equation
Topic: Given the energy, calculate the wavelength of y-rays
Replies: 11
Views: 1693

Re: Given the energy, calculate the wavelength of y-rays

He got the value c from the speed of light.
by Ashley Osorio
Thu Oct 03, 2019 5:28 pm
Forum: Molarity, Solutions, Dilutions
Topic: Clarification for G17b ?
Replies: 4
Views: 46

Re: Clarification for G17b ?

Adding on to this question, why is there a dot between CuSo4 • 5H2O? What does it mean? Is it any different as to if they were completely together??
by Ashley Osorio
Thu Oct 03, 2019 5:13 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reagent Ratios
Replies: 4
Views: 87

Re: Limiting Reagent Ratios

I've had that same problem! I know we have to compare the values to each other to see which is the limiting reactant and which is in excess, but I don't know how to do that when the numbers aren't as simple as a 1:2 ratio. But, I THINK that the way to do it is to multiply by the reciprocal of the ra...
by Ashley Osorio
Thu Oct 03, 2019 3:54 pm
Forum: SI Units, Unit Conversions
Topic: Formula units vs molecule
Replies: 7
Views: 164

Re: Formula units vs molecule

This excerpt from the book cleared that up for me because I was stumped on the idea of formula units too. " e molar mass of an element is the mass per mole of its atoms. e molar mass of a molecular compound is the mass per mole of its molecules. e molar mass of an ionic compound is the mass per...

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