Search found 50 matches

by Jasmine Summers 4G
Sat Nov 30, 2019 8:40 pm
Forum: Lewis Acids & Bases
Topic: Nitrate
Replies: 4
Views: 40

Re: Nitrate

There is a chart in 9C that lists common compounds, I think we are supposed to learn those.
by Jasmine Summers 4G
Sat Nov 30, 2019 8:39 pm
Forum: Bond Lengths & Energies
Topic: Melting Points
Replies: 8
Views: 204

Re: Melting Points

Yes, a stronger IMF relates to a higher melting/boiling point and a lower vapor pressure.
by Jasmine Summers 4G
Sat Nov 30, 2019 8:38 pm
Forum: Naming
Topic: Conjugate
Replies: 2
Views: 29

Re: Conjugate

A conjugate acid can donate a proton, and a conjugate base is the species that remains after the acid has donated its proton.
by Jasmine Summers 4G
Sat Nov 30, 2019 8:36 pm
Forum: Amphoteric Compounds
Topic: compounds
Replies: 5
Views: 47

Re: compounds

The compound can be both acidic or basic, by donating a proton or accepting a proton.
by Jasmine Summers 4G
Sat Nov 30, 2019 8:19 pm
Forum: Bronsted Acids & Bases
Topic: HBr
Replies: 3
Views: 36

Re: HBr

That seems correct to me because the HBr has a H that is can give up to the water, which would act as a base. Br wouldn't be able to fit another proton either.
by Jasmine Summers 4G
Sat Nov 30, 2019 8:17 pm
Forum: Amphoteric Compounds
Topic: 6A. 11
Replies: 3
Views: 52

Re: 6A. 11

These compounds can act as both acids and bases. One reaction will produce H30+, while the other will produce OH-
by Jasmine Summers 4G
Sun Nov 24, 2019 10:21 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Equation
Replies: 4
Views: 186

Re: Heisenberg Equation

You cannot know simultaneously the position and momentum of a particle. The most uncertainty you have in the position of the particle, the less there can be in the momentum and vice versa.
by Jasmine Summers 4G
Sun Nov 24, 2019 10:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond angles
Replies: 7
Views: 74

Re: Bond angles

Yes, the bond angles are approximately 90, 120, and 180 degrees.
by Jasmine Summers 4G
Sun Nov 24, 2019 10:18 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Drawing Structures
Replies: 4
Views: 63

Re: Drawing Structures

As people said, drawing a standard lewis structure is all we have to do I think.
by Jasmine Summers 4G
Sun Nov 24, 2019 10:17 pm
Forum: Naming
Topic: Trans and Cis
Replies: 8
Views: 115

Re: Trans and Cis

From what I understand, trans and cis are just 2 versions of resonance structures. Trans and typically non polar, while cis are polar.
by Jasmine Summers 4G
Sun Nov 24, 2019 10:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE Format
Replies: 34
Views: 242

Re: AXE Format

The subscript isn't needed as it is just assumed there is only one.
by Jasmine Summers 4G
Sun Nov 24, 2019 10:15 pm
Forum: Sigma & Pi Bonds
Topic: Molecular Shape
Replies: 11
Views: 105

Re: Molecular Shape

The only difference is that sigma bonds allow for rotation, while pi bonds don't. However, with molecular shape, double and single bonds are treated as the same, so it doesn't affect bond shape.
by Jasmine Summers 4G
Sun Nov 17, 2019 7:57 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: types of bonds
Replies: 14
Views: 434

Re: types of bonds

Yes, all single bonds are sigma bonds and the subsequent bonds are pi bonds.
by Jasmine Summers 4G
Sun Nov 17, 2019 7:56 pm
Forum: Bond Lengths & Energies
Topic: Bond Length
Replies: 10
Views: 187

Re: Bond Length

As mentioned, it is determined experimentally. We just need to know that double bonds are stronger and shorter than single bonds.
by Jasmine Summers 4G
Sun Nov 17, 2019 7:55 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: dipole moments
Replies: 7
Views: 61

Re: dipole moments

Yes, because when two atoms have different electronegativities, one atom will attract the shared electrons more than the other creating a dipole moment and polarity.
by Jasmine Summers 4G
Sun Nov 17, 2019 7:54 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 19
Views: 665

Re: Noble Gases

Noble gases have very small electronegativites since they already have full octets.
by Jasmine Summers 4G
Sun Nov 17, 2019 7:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 19
Views: 224

Re: Test 2

The double/single bonds doesn't matter as much, the lewis structure just helps you figure out where the lone pairs are and how the bound atoms are distributed.
by Jasmine Summers 4G
Sun Nov 17, 2019 7:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining a VSEPR model
Replies: 6
Views: 57

Re: Determining a VSEPR model

With the VSEPR model, you treat single bonds and double bonds as the same. Thus, it doesn't matter which resonance structure you use.
by Jasmine Summers 4G
Wed Nov 06, 2019 10:30 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Solving with velocity
Replies: 3
Views: 123

Re: Solving with velocity

The actual velocity is important for most of the problems we've been solving, and it is usually provided. For energy, the difference in energy is usually what matters more because energy is conserved.
by Jasmine Summers 4G
Wed Nov 06, 2019 10:22 pm
Forum: Electronegativity
Topic: Ionic or covalent?
Replies: 17
Views: 191

Re: Ionic or covalent?

A bond is ionic typically if the difference between 2 element's electronegativity is greater than 2, and a bond is covalent if the difference in electronegativity is less than 1.5. Many bonds however are partially ionic although they're still considered covalent. These bonds have dipole moments and ...
by Jasmine Summers 4G
Wed Nov 06, 2019 10:20 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum numbers
Replies: 12
Views: 273

Re: Quantum numbers

As mentioned, the angular momentum quantum number is determined by l. L can be any value (n-1) and relates to whether an element is in the s, p, d, or f block on the periodic table.
by Jasmine Summers 4G
Wed Nov 06, 2019 10:19 pm
Forum: Electronegativity
Topic: Electron affinity
Replies: 4
Views: 47

Re: Electron affinity

Electron affinity is how happy an atom is when it receives an electron from another atom. The more positive its electron affinity is, the more energy it will be release when it receives an electron.
by Jasmine Summers 4G
Wed Nov 06, 2019 10:18 pm
Forum: Dipole Moments
Topic: Dipole Moments Determined by Electronegativity?
Replies: 3
Views: 49

Re: Dipole Moments Determined by Electronegativity?

Dipole moments point toward the more electronegative atom, because their higher electronegativity attracts the other atom's electrons closer toward it. This means that their bond isn't completely covalent. When atoms have a higher difference in electronegativity, the dipole moment is stronger and th...
by Jasmine Summers 4G
Sat Nov 02, 2019 11:55 am
Forum: Quantum Numbers and The H-Atom
Topic: determining the number of orbitals
Replies: 7
Views: 96

Re: determining the number of orbitals

The number of orbitals correlates to the m quantum number and how man there are. l=0 (s, 0) has 1 orbital, l=1 (p, -1,0,1) has 3 orbitals, l=2 (d, -2,-1,0,1,2) has 5 orbitals, and l=3 (f, -3,-2,-1,0,1,2,3) has 7 orbitals.
by Jasmine Summers 4G
Sat Nov 02, 2019 11:53 am
Forum: Octet Exceptions
Topic: Expanded Octet
Replies: 3
Views: 42

Re: Expanded Octet

From my understanding, any elements past phosphorus can ave expanded octets due to the having d orbitals that will hold additional eletrons.
by Jasmine Summers 4G
Sat Nov 02, 2019 11:52 am
Forum: Octet Exceptions
Topic: More than 8 valence e-
Replies: 8
Views: 93

Re: More than 8 valence e-

Once you get past phosphorus, those elements have the d orbitдal in addition to the s and p orbitals, allowing the elements to old additional electrons in their shell
by Jasmine Summers 4G
Sat Nov 02, 2019 11:46 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Understanding Ionic Radius
Replies: 3
Views: 45

Re: Understanding Ionic Radius

ionic radius decreases toward the right since the electrons are pulled in loser, but then increase down since the energy level of the elements increases that direction
by Jasmine Summers 4G
Sat Nov 02, 2019 11:45 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cu and Cr
Replies: 11
Views: 94

Re: Cu and Cr

Yes this trend apples to all 4 of the "coinage" metals
by Jasmine Summers 4G
Sat Oct 26, 2019 3:18 pm
Forum: Octet Exceptions
Topic: Max number of valence e
Replies: 6
Views: 66

Re: Max number of valence e

I think the max number any electron can have is 8 because valence electrons are electrons in the outermost shell of an atom, and there can only be a max of 8 in any shell after the first (which is only 2).
by Jasmine Summers 4G
Sat Oct 26, 2019 3:17 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum number m
Replies: 3
Views: 48

Re: Quantum number m

The quantum number m refers to the magnetism of an electron, and for m,s it refers to its spin. An electrons can either be +1/2 or -1/2, meaning it spins up or down. Paired electrons always have opposite spins.
by Jasmine Summers 4G
Sat Oct 26, 2019 3:10 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Noble Gas Configuration
Replies: 2
Views: 41

Re: Noble Gas Configuration

In my discussion section, we also went over the full configurations so I would also try to know how to do those. Because for some elements like Cr and Cu there are exceptions as to how they're written.
by Jasmine Summers 4G
Sat Oct 26, 2019 3:09 pm
Forum: Ionic & Covalent Bonds
Topic: Atomic Radius
Replies: 4
Views: 134

Re: Atomic Radius

Atomic radius directly depends on how many electrons an element has because the more electrons an atom has, the larger it will be. Therefore it increases from left to right and from top to bottom along the periodic table.
by Jasmine Summers 4G
Sat Oct 26, 2019 3:08 pm
Forum: Properties of Light
Topic: frequency/intensity
Replies: 2
Views: 51

Re: frequency/intensity

I don't think so, intensity has to do with the number of photons being emitted, while frequency refers to the wavelengths per second. Intensity also relates to the amplitude of the radiation's wave function.
by Jasmine Summers 4G
Fri Oct 18, 2019 11:21 pm
Forum: Properties of Electrons
Topic: Equations for Test
Replies: 9
Views: 119

Re: Equations for Test

Similar to the first test we had, I assume there will be a formula sheet. But understanding the equations and what they mean is probably helpful.
by Jasmine Summers 4G
Fri Oct 18, 2019 11:20 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 315

Re: Unit for Wavelength

In problems, nm are often used because wavelengths are so small. However, make sure that you're using meters for the calculations because that is the SI unit used.
by Jasmine Summers 4G
Fri Oct 18, 2019 11:19 pm
Forum: Properties of Electrons
Topic: Momentum
Replies: 11
Views: 85

Re: Momentum

Momentum also takes into account mass of an object, and defines how much force or energy it takes to move or stop an object. The heavier the object is, the more momentum it has.
by Jasmine Summers 4G
Fri Oct 18, 2019 11:17 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg
Replies: 4
Views: 29

Re: Heisenberg

The idea that there are limits to how certain you can't be about a particle's position and velocity at the same time. The more accurate your position measurement is, the less sure you become about velocity and vice versa.
by Jasmine Summers 4G
Fri Oct 18, 2019 11:16 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Coulombs's Law
Replies: 2
Views: 37

Re: Coulombs's Law

For this class, I a, pretty sure that r refers to the distance between charges, not their atomic radii since they are so similar in most cases
by Jasmine Summers 4G
Thu Oct 10, 2019 3:55 pm
Forum: Limiting Reactant Calculations
Topic: general questions
Replies: 11
Views: 374

Re: general questions

Finding the limiting reactant tells you what the maximum theoretical yield will be because you can only produce as much product as you have reactants to form that product. The limiting reactant is the reagent that is completely used up in the reaction, so it will indicate how much total product can ...
by Jasmine Summers 4G
Thu Oct 10, 2019 3:54 pm
Forum: Empirical & Molecular Formulas
Topic: F.21
Replies: 2
Views: 81

Re: F.21

I always just follow what the question asks for in terms of units, but during my calculations I try to keep it consistent. You can always convert to grams and liters then convert back for the final answer.
by Jasmine Summers 4G
Thu Oct 10, 2019 3:53 pm
Forum: Properties of Light
Topic: Energy of light
Replies: 4
Views: 71

Re: Energy of light

Shorter wavelengths correlate to higher frequency, which tells you there is higher energy. Think of something moving super fast, it will have a higher frequency with waves that "move" faster- this correlates with higher energy.
by Jasmine Summers 4G
Thu Oct 10, 2019 3:52 pm
Forum: Empirical & Molecular Formulas
Topic: Converting from grams to percentage
Replies: 11
Views: 274

Re: Converting from grams to percentage

Assuming you have a 100g sample is the easiest way to do it because you bypass finding mass percentage composition and equate the given percentages to mass. You then use those masses to find moles.
by Jasmine Summers 4G
Thu Oct 10, 2019 3:51 pm
Forum: Significant Figures
Topic: Sig Figs only for Decimal Points vs for all integers in the Answer
Replies: 5
Views: 94

Re: Sig Figs only for Decimal Points vs for all integers in the Answer

As Michelle said, I always use the same amount of sig figs in my answer as was given in the original problem and keep more sig figs throughout my calculations to get the most accurate final answer. For multiplication and division, use the lowest amount of sig figs given, and same for addition and su...
by Jasmine Summers 4G
Thu Oct 10, 2019 3:49 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 43
Views: 3900

Re: E=hv

E represents the energy of a photon, and change in E can be used to find the difference in energy levels
by Jasmine Summers 4G
Thu Oct 03, 2019 5:29 pm
Forum: Limiting Reactant Calculations
Topic: Basic Question
Replies: 11
Views: 160

Re: Basic Question

For there to be 2 limiting reactants, I think there would need to be equal amounts of them, which doesn't usually happen.
by Jasmine Summers 4G
Thu Oct 03, 2019 5:28 pm
Forum: Limiting Reactant Calculations
Topic: Percentage Yields
Replies: 8
Views: 125

Re: Percentage Yields

A high yield means that the actual yield of products is close to the theoretical yield because percent yield equals actual yield divided by theoretical yield.
by Jasmine Summers 4G
Thu Oct 03, 2019 5:26 pm
Forum: General Science Questions
Topic: Naming compounds
Replies: 6
Views: 104

Re: Naming compounds

I don't think Professor Lavelle with expect us to know all of the elements yet, as none of our homework problems have required that either.
by Jasmine Summers 4G
Thu Oct 03, 2019 5:25 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: States of Matter
Replies: 9
Views: 277

Re: States of Matter

For the problems that we are currently solving, I don't think the states of matter make a difference.
by Jasmine Summers 4G
Wed Oct 02, 2019 10:25 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass
Replies: 10
Views: 122

Re: Molar Mass

Molar mass refers to the mass of one mole of the susbstance, and its units are g/mol. It is usually not given because you can figure it out from the periodic table by adding up the mass of each element in the compound.
by Jasmine Summers 4G
Wed Oct 02, 2019 10:22 pm
Forum: Limiting Reactant Calculations
Topic: limiting reactant
Replies: 5
Views: 124

Re: limiting reactant

As Sophia said, there is only one compound on the reactant side, so that must be the limiting reactant. No more product can be produced than what you start out with as reactants. Therefore, the theoretical yield corresponds to the maximum amount of product that can be produced given there are no imp...

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