CHEMISTRY COMMUNITY

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Mya Majewski 1L wrote:if your k is in min^-1 and your t is in seconds then what do you do?

You can convert either one as long as it matches/is consistent with the other. You should try to see if the question specifies in what units it wants the answer.

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You can find a catalyst in the beginning of the reaction and at the end whereas an intermediate is produced and consumed during the reaction.

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005113695 wrote:You should probably know the different rate laws, and the different equations that can be derived from them or link them to other equations.

The rate equations will be given during the test but you must know to differentiate between them.

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haleyervin7 wrote:Is there any case where there must be a catalyst for a reaction to occur?

You can think about enzymes, which are considered catalysts, in biological scenarios where they are required for some reactions to occur.

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You wrote down the correct information. Zero order reactions are not dependent on the concentrations of the reactant

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Sometimes there are worksheets with the answer keys posted here on chemistry community. Those can be helpful if you can't make it to the workshops

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Helium walks into a bar. The bartender says, "We don't serve noble gases here." Helium doesn't react.

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Silver walks up to gold in a bar and says, "Au, get outta here!"

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I would tell another chemistry joke...
...but all the good ones Argon.

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Two chemists walk into a bar.
One says, "I'll have an ‎H2O." The other says, "I'll have an ‎H2O, too." The second chemist died

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Want to hear a joke about sodium, bromine, and oxygen?
NaBrO

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Someone threw sodium chloride at me.
I yelled, "That's a salt!"

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I dare you to lower your body temperature to absolute zero.
I promise you'll be 0K.

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What did the thermometer say to the measuring cylinder?
“You may be graduated, but I have several degrees.”

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Why did the attacking army use acid?
To neutralize the enemy’s base.

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How did the hipster chemist burn his hand?
He picked up his beaker before it was cool.

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If you're not part of the solution, you're part of the precipitate.

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What do you do with a dead chemist?
Barium

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If H2O is the formula for water, what is the formula for ice?
H2O³

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Why was the mole of oxygen molecules excited when he walked out of the singles bar?
He got Avogadro's number!

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What did the scientist say when he found 2 isotopes of helium?
HeHe

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Anyone know any jokes about sodium?
Na

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What is the show cesium and iodine love watching together?
CSI

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How about the chemical workers… are they unionized?

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What show do cesium and iodine love to watch together?
CsI

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My friend stopped learning about electron after he got Bohr'd

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Why does hamburger have lower energy than steak?
Because it's in the ground state

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What did the chemical agent say?
Name is Bond, Ionic Bond. Taken, not shared

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What is the dullest element?
Bohrium

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Why do chemists like nitrates so much?
Because they are cheaper than day rates

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The formula only works for kinetic energy because kinetic energy is the only energy that is directly proportional to the mass of the object and to the square of its velocity

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Both electronegativity and electron affinity increase upward for the groups and from left to right across periods of a periodic table.

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They are both essentially different approaches to acids and bases like the above posts have explained. The Lewis definition of acids and bases is just a bit more broad.

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Lynsea_Southwick_3F wrote:What is the units for momentum, p?

If the mass is in kilograms and the velocity is in meters per second then the momentum is in kilogram meters per second (kg⋅m/s)

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Anjali_Kumar3E wrote:What is the function of cisplatin?

cisplatin used to treat various types of cancer. It kills cancer cells by damaging DNA and inhibiting DNA synthesis.

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one wavelength equals the distance between two successive wave crests or troughs.

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The elements in and close to the diagonal line of metalloids typically form amphoteric oxides

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Old chemists never die, they just stop reacting

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If H20 is water, what is H204?
Drinking, bathing, washing, swimming, etc.

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What did one ion say to the other?
I've got my ion you.

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What did the scientist say when he found 2 isotopes of helium?
HeHe

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What's the fastest Noble gas?
Neeeeeon

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When I learned how many electrons an oxygen atom needs to fill its first orbital, I was like :O

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What do you do with a sick chemist?
First you try to helium, then you try to curium, but if this fails then you have to barium.

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If at anytime you are confused at these types of questions, you could look at the chemical equation to see if all the hydrogen atoms are accounted for in the reactants and products.

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A few examples of polydentate ligands are oxalate, ethylenediamine and diethylenetriamine. all of these could attach to the central atom in a coordination complex by two or more bonds.

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I would recommend doing the homework problems and going over the review worksheets created by the UAs

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Karina Jiayu Xu 4E wrote:Do we have to memorize the polydentates for the final?

I think it would be helpful to be familiar with the ones we see most often such as oxalate, ethylenediamine and diethylenetriamine.

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There isn't really a difference. Both terms can be used to describe the the molecular shape of AX₂E or AX₂E₂.

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Usually, increasing the polarization of bonds increases the strength of the intermolecular forces

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Ethan Breaux 1J wrote:Is VSEPR Notation also referred to as VSEPR Formula?

As far as I know, they should be mean the same thing. I've seen them being used interchangeably.

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Ethan Breaux 1J wrote:Is VSEPR Notation also referred to as VSEPR Formula?

As far as I know, they should be mean the same thing. I've seen them being used interchangeably.

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Do you know what went down between Sodium and Hydrogen?
NaH

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I tried to tell a joke about cobalt, radon, and yttrium
it was CoRnY

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405021651 wrote:Will it be only topics on outline 3?

I think the test would also include topics from outline 4 which is about VSEPR and hybridization

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Did you hear about the dude who got cooled to absolute zero?
He's 0K now

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How was Oxygen's date with Potassium?
It went OK

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It also helps to look at the VESPR formula notation for the shapes. Octahedral is noted as AX₆E₀ while Square Planar is noted as AX₄E₂.

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I wish to apologize for not having more chemistry jokes, but I only add them periodically

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Why did the bear dissolve in water?
its a polar bear

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Why cant you drink CH2O?
'cause its seawater

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