CHEMISTRY COMMUNITY

Theresa Dinh 3F

Usually when there's an intermediate involved, you have to use the pre equilibrium approach.

Theresa Dinh 3F

O is a catalyst so it's not actually involved in the reaction

Theresa Dinh 3F

usually when naming organic compounds, you want to put the substituent as close to 1 as possible when naming. that's probably why

Theresa Dinh 3F

At higher temperatures, molecules are moving a lot faster because there is more energy in the environment (temperature is the measure of heat, which is energy in the environment). Because of this, they are more likely to be able to collide at the required energy level

Theresa Dinh 3F

Calculating by kinetics (by k and stuff) provides an answer that is mostly stable for diamond, but the thermodynamic equations (gibbs free energy) show that it is unstable.

Theresa Dinh 3F

They should give you the steps, otherwise any number of steps could technically occur.

Theresa Dinh 3F

They are not perfect crystals, which is the problem. Thus they cannot be exactly S=0. You have to figure out the entropy using the equation S = K ln W W is the number of different configurations that a molecule can have. Since SF6 has only one configuration, but SF5CL can have many different configu...

Theresa Dinh 3F

It sounds like it's referring to calculating the energy it takes to convert between states of matter.

Theresa Dinh 3F

Polarity should not have anything to do with disorder, because it is less to do with energy and more to do with attraction

Theresa Dinh 3F

According to an online source ( http://web.chem.ucla.edu/~harding/IGOC/K/kekule_structure.html ) it is a Lewis structure in which bonded electron pairs in covalent bonds are shown as lines and avoids showing lone pairs. Resonance just makes the kekule structure show two different versions of benzene...

Theresa Dinh 3F

H2O is normally a liquid. Especially since the combustion reaction appears to be just two liquids reacting with each other, which means that most likely they are not heating up enough to react. O2 liquid is usually found in only extremely cold temperatures. You can double the equation if needed, but...

Theresa Dinh 3F

I am pretty sure we will be given standard reaction enthalpies if it is needed. Otherwise, it'll be something we need to figure out from the problem provided, so it wouldn't be provided at that point.

Theresa Dinh 3F

Don't we get a list of weak and strong acids? Also, you can derive the formula from the name. Methyl = CH3, Amine = NH2

Theresa Dinh 3F

Actually, it's when x is less than 5% of the initial amount, after you calculate it. Not Ka.

Theresa Dinh 3F

They basically just simplified the problem and substituted in the Kc value. The Equation is merely a simplified way of writing out the complicated fractions.

Theresa Dinh 3F

No, it is not considered to be in equilibrium. The rate of change for the forward reaction must equal the rate of change for the opposite reaction in order to be considered at equilibrium.

Theresa Dinh 3F

I believe sometimes when a reaction occurs, the changes in the amount of reactants and products can sometimes balance out to make an overall no change in pressure.

Theresa Dinh 3F

I read somewhere that it's because despite H2O having two pairs, the H2O prefers not to share the second pair of electrons, so technically that would make the H2O provide the same amount of electrons as the other elements. Don't quote me exactly on this however. I have also read that a ligand's stre...

Theresa Dinh 3F

Which parts specifically do you need explaining in this section? In short, this section basically talks about how each element has its own level of strength when pulling in electrons. Just like how each person can lift a certain weight, each element has its own pull on electrons. Because of this, el...

Theresa Dinh 3F

There are different degrees of polarity, and this arises mostly due to the electronegativity of elements (how strong they pull on the electrons). Oxygen is known for having high electronegativity, which means it pulls it very strongly while H is known for being weaker, which is also why water is a p...

Theresa Dinh 3F

It's probably more accurate to draw it the second way, just because that's how the molecule works normally, and the first method is more for two molecular ions rather than a single element and a molecule (eg (nh3)3PO4)

Theresa Dinh 3F

Gold walks into a bar. The bartender shouts "Ay you! Get out of here!"

Theresa Dinh 3F

Thank you!

Theresa Dinh 3F

Is the midterm on Nov. 2nd at 4PM for those taking LS30A? just wanted to make sure. Thanks in advance!

Theresa Dinh 3F

I believe that it is because the higher the frequency the stronger it is. For example a radio wave, which has a low frequency rate, is weaker than a gamma ray, which has a high frequency (due to shorter wavelength).

Theresa Dinh 3F

I'm from Rieber Vista, and this sounds pretty cool. Where would the meeting place be?

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Re: Pre- equilibrium approach [ENDORSED]

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