CHEMISTRY COMMUNITY

John_Tran_3J

Yes he does not teach 14C

John_Tran_3J

140 points max but there is an addition of 4 points (it will be maxed out at 140 though.)

John_Tran_3J

It will be released a week from today (Sunday.)

John_Tran_3J

It went pretty well

John_Tran_3J

No we will not, there Is no such thing.

John_Tran_3J

I'm proud that my test scores have increased since last quarter!

John_Tran_3J

Thank you for reminding us!

John_Tran_3J

Enthalpy is referred to the amount of energy released (heat released) and entropy refers to the amount of disorder in the world (refers to the second law of thermodynamics,)

John_Tran_3J

Hadnwriting is very efficient because it assist your brain's retention!

John_Tran_3J

Honestly, just feeling good about the material you studied is the best! I recommend just studying and having fun while youre at it and then it will all come to you during the exam!

John_Tran_3J

I personally use the outlines as reference to what I should study for the final exam.

John_Tran_3J

Spam musubi

John_Tran_3J

Lavelle has been awfully generous with he free points these past few tests.

John_Tran_3J

Yes they do matter!

John_Tran_3J

Sunday march 14th

John_Tran_3J

Sunday March 18th

John_Tran_3J

Last year Lavelle offered sessions from all the TAs and UAs with worksheets!

John_Tran_3J

Lavelle regularly extracts textbook problems and implements them on the final.

John_Tran_3J

It is definitely not always positive, because there is always disorder in the world.

John_Tran_3J

They are the same, the second equation has a disturbuted negative sign.

John_Tran_3J

U should normally use 8.314. You should use .08206 when you don't intend to multiply it by 101.325 for the conversion of atm.

John_Tran_3J

I play Pokemon with my friends! I just love the feeling of being finished with tests for the week.

John_Tran_3J

I play Pokemon with my friends!!!

John_Tran_3J

When pressure applied/ compressing a system.

John_Tran_3J

I will be taking it during spring quarter

John_Tran_3J

Attack on titan :D

John_Tran_3J

I remember that the final was significantly more difficult than the midterms, many student complained about the lack fo time they were given to complete the exam.

John_Tran_3J

As long as u finish all the sapling and chem community points, u can pass the class with a C-

John_Tran_3J

by today we should have 25 points

John_Tran_3J

Closed means things cannot enter in or out

John_Tran_3J

Regarding phases change, when a solid becomes to liquid, heat is NEEDED to melt the solid.. also known as endothermic

John_Tran_3J

First looks at the units, the most common constant used is 8.314

John_Tran_3J

Work (textbook def) work is the energy transfer that occurs from a force acting over a distance.

John_Tran_3J

Homework problems from our textbooks help best! Lavelle pulls the format of his midterm questions from the textbook

John_Tran_3J

Yes im finally relieved! Thank [censored] it is over!!!

John_Tran_3J

I AM a terrible test taker, but I found this test to be easier than expected!

John_Tran_3J

I listen to Mario kart soundtrack music for efficiency

John_Tran_3J

Since it p values involves -log, you would be given valets that you have to multiply or divide.

John_Tran_3J

I believe that he has not stated when to release the midterm grades!

John_Tran_3J

The CHEM14B website is working just fine. It could be the browsers/computers problem maybe!

John_Tran_3J

Anything that is a liquid or solid is not considered in the concentration. BUT if H2O was a gas, it would be able to contribute the constant.

John_Tran_3J

GO to myucla. Look at the top right corner where it stays "exams and homework grades." Look for chem14B, and the updated grades should be there.

John_Tran_3J

Q, the reaction quotient is the concentration at ANY TIME during the reaction. K is when the equilibrium is set between the products and reactants.

John_Tran_3J

I use molar concentration, it is the most simple in the end.

John_Tran_3J

According to Hess' Law, that is correct it would be squared because all coefficients would also be squared.

John_Tran_3J

Similar to calculating Kc or Kp, we will HAVE TO implement the use of the stoichiometric coefficients in Kw simply because that is part of the equation given to us.

John_Tran_3J

With our equation "products/reactants" we can see if the concentration is a number "1x10^-3" it is very small meaning the denominator is very big in comparison to the numerator. Therefore, the equation will "shift" to the left because the reactants are greater than the ...

John_Tran_3J

Kw (along with Kc and Kp) is dependent on temperature, the only thing that affects these contests is temperature. A neutral pH is 7, also known as -log[1x10^-7]

John_Tran_3J

Concerning Kc or Kp we will use Kelvin, but we have not gone into detail about when or how to calculate the temperature.

John_Tran_3J

I agree with the post above regarding the use of Kp with gases and Kc with concentration. You can also make note if you were given the concentration whether if it's in MOLS (Kc) or BARS (Kp).

John_Tran_3J

They are only for extra practice, they are not mandatory!

John_Tran_3J

Q would alter because Q represents the concentration (reaction quotient) at any point in the reaction, K represents the concentration at equilibrium.

John_Tran_3J

I believe that K (equilibrium constant) is temperature dependent (endothermic/exothermic.)

John_Tran_3J

I believe that these will be the only audio visual topics for the rest of the quarter!

John_Tran_3J

Due to Corona, I guess ill be flying back to my hometown and enjoy my time with family.

John_Tran_3J

After studying for along period of time (assuming that your final is an hour), you should rest ur body up to 20 minutes prior to taking the exam so your body can maintainability a recharge while not completely falling asleep.

John_Tran_3J

You should take into account that lone pairs can cause bond angles to decrease.

John_Tran_3J

Bronsted A/B relate to specifically hydrogen donors/acceptors and Lewis A/B relate to lone pair donors/acceptors

John_Tran_3J

I would post a good chemistry joker here, but all the good ones argon!

John_Tran_3J

It is due to the fact that the Fe atom has 4 Br atoms bonding to it.

John_Tran_3J

It will be pivotal for us to remember by ourselves because we will not be able to use notes on our final exam.

John_Tran_3J

It is a coordination compound that forms a ring around a polydentate cation.

John_Tran_3J

Per my last midterms, I just studied a compilation of the UA workshop sheets, Sapling, and textbook questions. Doing them by yourself is very satisfying and beneficial for you to understand the concepts.

John_Tran_3J

Since Ive started to study for finals earlier, I feel more confident and happy about the quarter ending.

John_Tran_3J

The rules are when l=0, its an s orbital when it increases (l=1,2,3) the orbitals are p,d, and f orbitals.

John_Tran_3J

I agree with the posts above, the decimal creates another significant figure because of its specific rule.

John_Tran_3J

It increases from left to right and from down to up. In other words, electro negativity increases as you approached to the top right corner of the periodic table.

John_Tran_3J

It is definitely a mistake, it cannot achieve sp3.

John_Tran_3J

In terms of significant figures, the "d" orbital would have 2 nodes because l=2.

John_Tran_3J

Since there should 5 posts per week, and we are now on week 8, there should be a cumulative total of 40 posts by the END of this weeks!

John_Tran_3J

From my memory, I believe Phosphorus, Sulfur, and Chlorine have expanded octets, meaning they can contain more than 8 valence electrons. There are also molecules that don't have to abide by the octet rule, they are known as Hydrogen and Helium.

John_Tran_3J

Both melting and boiling point increase when the intermolecular forces are stronger.

John_Tran_3J

It is known that LDF is in all forces, but it is strongest in non-polar molecules.

John_Tran_3J

Correct! S is near a full valence shell, so it will be greedy and take the other valence electrons.

John_Tran_3J

I believed that its called dipole, because "di" refers to two sides of a molecule and "pole" refers to polar. To conclude, dipole refers to both (2) sides of a polar molecule.

John_Tran_3J

Its safe to assume that we should know the last 8 bullet points of the outline.

John_Tran_3J

I agree with others, I've been worrying about the weight of midterm grades for awhile.

John_Tran_3J

I believe that we should at least know the trend of atomic radii: where it decreases from right to left and up to down on the periodic table.

John_Tran_3J

For me, I just attend UA workshop/step up sessions to relearn the information from Lavelle's lecture!

John_Tran_3J

It wouldn't't be fair for Lavelle to assume that we all know the concept "nomenclature," so I think we can safely assume that we won't have to know "Chemical names" for the second midterm.

John_Tran_3J

Man: Are there any good chemistry jokes out there?
Me: I don't zinc so?

John_Tran_3J

ionic bonds give and take electrons while covalent share electrons.

John_Tran_3J

1/s = Hz
1 Joule= 1 kg m^2/s^2

John_Tran_3J

Based on previous years and the posts above, it's safe to assume that there will not be a curve.

John_Tran_3J

I assume that there will be no lecture because my other classes do not have lectures on Wednesday.

John_Tran_3J

It is possible to have the same 3 quantum numbers, but it is not possible to have 4 of the same. The four quantum numbers determine the magnetic spin (1/2 or -1/2.)

John_Tran_3J

The formula to calculate formal charge is: Formal Charge = Valence electrons - (shared electrons/2 + lone pairs)!

John_Tran_3J

There are a couple ways of using DeBroigle's euqation, first if you are given a wavelength and are asked to calculate the velocity of an ejected electron. Second if you are given the velocity and asked to calculate the wavelength of an ejected electron.

John_Tran_3J

The homework will be due tonight (Sunday) at 11:59pm, good luck!

John_Tran_3J

I agree with the posts above, it is theoretically possible, but there are no elements in the periodic table that corresponds to l=4.

John_Tran_3J

To correctly balance an equation with fractions as stoichiometric coefficients, you must multiply every coefficient with the demoniator of the fraction. This action causes every coefficient (including the faction) to become a whole number.

John_Tran_3J

I agree with the post above, for this problem you should definitely use the DeBroigle equation and alternate between the masses of the particles you are trying to calculate. This in turn, will give you different values for the specific particles.

John_Tran_3J

I agree with every post/reply above me! Unit conversion is an essential topic, as mentioned in Lavelle's recent lecture.

John_Tran_3J

In chemistry, sig figs should be applied to everything for maximum accuracy!

John_Tran_3J

In one of Lavelle's recent lectures, I recall him using the number 3.29 X 10^15 Hz as the constant.

John_Tran_3J

I comprehends subjects more when written out. In other words, I rewatch the lectures and retake notes as a refresher, I then look up worksheets regarding each topic (ie: work function, molar mass, atomic spectra etc....)

John_Tran_3J

To compute the energy of an incoming photon use E=hv, De Broigle's equation is used for electrons.

John_Tran_3J

I believe that my TA said that the constants (Avo. number, Speed of light, Plank's constant...) will be given to us on the test. I also heard that the periodic table will be accessible as well.

John_Tran_3J

The equation can be manipulated to to solve for either "E" for energy or for "wavelength." When solving for energy, you would use joules. When given the energy at any question, you would have to solve for "wavelength" meaning your units would be in M for meters, the ans...

John_Tran_3J

It really depends on the amount of energy in the photons. If there are 3 photons with insufficient energy (to give off an electron) then no electrons would be given off. This is due to the fact that increase of intensity in the light source only increases the quantity of photons, NOT the energy of p...

Search found 108 matches