CHEMISTRY COMMUNITY

Jasmine Summers 4G

There is a chart in 9C that lists common compounds, I think we are supposed to learn those.

Jasmine Summers 4G

Yes, a stronger IMF relates to a higher melting/boiling point and a lower vapor pressure.

Jasmine Summers 4G

A conjugate acid can donate a proton, and a conjugate base is the species that remains after the acid has donated its proton.

Jasmine Summers 4G

The compound can be both acidic or basic, by donating a proton or accepting a proton.

Jasmine Summers 4G

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.

Jasmine Summers 4G

These compounds can act as both acids and bases. One reaction will produce H30+, while the other will produce OH-

Jasmine Summers 4G

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.

Jasmine Summers 4G

Yes, the bond angles are approximately 90, 120, and 180 degrees.

Jasmine Summers 4G

As people said, drawing a standard lewis structure is all we have to do I think.

Jasmine Summers 4G

From what I understand, trans and cis are just 2 versions of resonance structures. Trans and typically non polar, while cis are polar.

Jasmine Summers 4G

The subscript isn't needed as it is just assumed there is only one.

Jasmine Summers 4G

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.

Jasmine Summers 4G

Yes, all single bonds are sigma bonds and the subsequent bonds are pi bonds.

Jasmine Summers 4G

As mentioned, it is determined experimentally. We just need to know that double bonds are stronger and shorter than single bonds.

Jasmine Summers 4G

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.

Jasmine Summers 4G

Noble gases have very small electronegativites since they already have full octets.

Jasmine Summers 4G

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.

Jasmine Summers 4G

With the VSEPR model, you treat single bonds and double bonds as the same. Thus, it doesn't matter which resonance structure you use.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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 ...

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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...

Jasmine Summers 4G

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.

Jasmine Summers 4G

From my understanding, any elements past phosphorus can ave expanded octets due to the having d orbitals that will hold additional eletrons.

Jasmine Summers 4G

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

Jasmine Summers 4G

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

Jasmine Summers 4G

Yes this trend apples to all 4 of the "coinage" metals

Jasmine Summers 4G

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).

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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

Jasmine Summers 4G

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 ...

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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...

Jasmine Summers 4G

E represents the energy of a photon, and change in E can be used to find the difference in energy levels

Jasmine Summers 4G

For there to be 2 limiting reactants, I think there would need to be equal amounts of them, which doesn't usually happen.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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.

Jasmine Summers 4G

For the problems that we are currently solving, I don't think the states of matter make a difference.

Jasmine Summers 4G

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.

Jasmine Summers 4G

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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