CHEMISTRY COMMUNITY

Anna Wu 1H

It depends on the shape and how many bonding sites they have available. for this question, you can check if the atoms have lone pairs.

Anna Wu 1H

Dr. Lavelle sent out an email with a chemistry community link addressing this question. He explained it really thoroughly so I would just recommend reading that!

Anna Wu 1H

part c) is 6 because there are 6 ligands = 6 attachments sites. There are 2 Cl atoms and 2 bidentate ligands. 2 bidentate ligands means that there are 4 attachment sites in total (2x2 = 4) so in total there are 2+4 = 6 attachments sites part d) is also 6 because hexadentate means there are 6 binding...

Anna Wu 1H

Those are exceptions of anions not being able to act as acids. HSO4- and H2PO4- are deprotonated forms of H2SO4 and H3PO4 and can act as extremely weak acids.

Anna Wu 1H

I think you should be able to tell based on the element's symbol on the periodic table

Anna Wu 1H

Why do chemists like working with ammonia?

It's pretty basic stuff.

Anna Wu 1H

Why does a hamburger yield lower energy than a steak?

Because it's in the ground state.

Anna Wu 1H

What did the scientist say when he found two isotopes of Helium?

HeHe

Anna Wu 1H

Did you hear that oxygen went on a date with potassium?

It went OK.

Anna Wu 1H

How often do i tell chemistry jokes?

Periodically

Anna Wu 1H

Yes, they are all the same.

Anna Wu 1H

The hybridization goes to 2p as well because it takes less energy to go to 2p rather than double up with another electron in the 2sp^2 orbitals. This also checks out with the molecular shape!

Anna Wu 1H

AXE notation is helpful because if all molecules with the same AXE formula have the same molecular shape!

Anna Wu 1H

Think about which and how many bonding pairs the lone pairs are acting with! If you're deciding between axial or equatorial placement, choose the orientation that minimizes repulsion, or interacts with the least number of bonding pairs. In terms of molecular shape, they aren't taken into account. On...

Anna Wu 1H

You also need to know sigma and pi bonds!

Anna Wu 1H

Two atoms bump into each other.’I think I lost an electron.’ The other asks: ‘Are you sure?’ The first replies: ‘I’m positive.’

Anna Wu 1H

Are you a diatomic molecule? Because you attract nothing.

Anna Wu 1H

Chemical jokes are boron… however physics jokes have potential.

Anna Wu 1H

Some guy tried to sell me sand for a thousand bucks yesterday. It was such a silicon.

Anna Wu 1H

Hey know any good jokes about Sodium?

Na

Anna Wu 1H

What is the chemical formula for sea water?

CH2O

Anna Wu 1H

Why was the mole of oxygen molecules excited when he left the singles bar?

He got Avogadro's number!

Anna Wu 1H

What element is a girl's future best friend?

Carbon.

Anna Wu 1H

What did one charged atom say to the other?

I've got my ion you.

Anna Wu 1H

What is the chemical formula of coffee?

CoFe2

Anna Wu 1H

Yes, the speed is always constant. This way, you can solve for the frequency of a wave given the wavelength and vice versa.

Anna Wu 1H

Free radicals fit into the octet rule because they are unpaired and thus, do not fit the octet or 8 valence electron standard.

Anna Wu 1H

A dipole moment occurs between two atoms if there is a large difference in electronegativity.

Anna Wu 1H

Anna Wu 1H

Yes. The arrow should start from the electropositive atom and end at the electronegative atom.

Anna Wu 1H

Exothermic Reactions? I studied them before they were cool.

Anna Wu 1H

Why are chemists so good at solving problems?

They have all the solutions.

Anna Wu 1H

I told a good chemistry joke, but there was no reaction):

Anna Wu 1H

A neutron walks into a bar and asks, how much for a beer?
The bartender looks up and says, for you no charge.

Anna Wu 1H

What do you do with a sick chemist?

If you can't Helium and you can't Curium, then you might as well Barium.

Anna Wu 1H

Superman is a man. Batman is a man. Spiderman is a man. So why is Ironman a woman?

Because she is a Female.

Anna Wu 1H

A chemistry professor couldn't resist interjecting a little philosophy into a class lecture. He interrupted his discussion on balancing chemical equations, saying, "Remember, if you're not part of the solution, you're part of the precipitate!"

Anna Wu 1H

What kind of fish is made of two sodium atoms?

2Na

Anna Wu 1H

What is HIJKLMNO?

H20!

Anna Wu 1H

Why did the white bear dissolve in water?

Because it was polar!

Anna Wu 1H

The molar ratio can convert any one substance to any other substance as long as you know the ratio of one to another. Therefore, it applies to single compounds (ex: you can use mole ratios to find mass of H in given amount of H2O), or to an entire reaction (in which you would use the balanced equati...

Anna Wu 1H

You don't need to know the specific health benefits of the solution. What's important is if there's any active reagent, and since there isn't any remaining at the end, the solution would have no effect at all.

Anna Wu 1H

The work function refers to the energy needed, while the threshold energy refers to the frequency of light needed. The two are the same in calculations.

Anna Wu 1H

The given energy is the threshold energy. Rearranging and combining the equations E=hv and c=vλ gives us λ=hc/E. plugging in the values into this equation gives the wavelength of light with sufficient energy.

Anna Wu 1H

Since the givens 0.278mol and 4.50mmol have 3 significant figures, then the answer should have 3 significant figures. The answer would be 0.0162

Anna Wu 1H

Yes, as long as you use mole ratios from the balanced equations to compare the amount of moles of reactants.

Anna Wu 1H

The amount of solute remains the same, but the volume changes. Since the solution is being diluted so dramatically, the 10 mL sample taken at the end has close to zero solute in it.

Anna Wu 1H

The question usually specifies what unit you should put your answer in, but the general rule is if the givens are in grams, the answer should be in grams, and if the givens are in moles, the answer should be in moles.

Anna Wu 1H

The answer for part B is 5.77g of P4O10 so your answer is correct. In order to solve part C, use the mass of the excess O2 for the second part of the reaction, and then divide that by the molar mass to find the number of moles of O2. Then, using the mole ratio of 1 mol P4O6 / 2 mol O2, convert moles...

Anna Wu 1H

The formula is written as MgSO4·7H2O. Heptahydrate is important in writing the formula. If it's not included, you would calculate the wrong molar mass of the compound.

Anna Wu 1H

The question is asking for the length of the fiber created by stringing together Ag atoms. To find the length, use the given radius, 144pm to find the diameter, how "long" the atom is, which is 288pm. This is how long one atom is. To find the length of 1.00mol Ag, first calculate the numbe...

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