CHEMISTRY COMMUNITY

Ishita_Dubey_2D

What does Silver say to Gold after he walks up to him at the bar?

AU, get outta here!

Ishita_Dubey_2D

What's the name of James Bond's Eskimo cousin?

Polar Bond.

Ishita_Dubey_2D

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

He got Avogadro's number.

Ishita_Dubey_2D

What show do Cesium and Iodine love watching together?

CSI

Ishita_Dubey_2D

Write out the balanced chemical equation for the formation of HBr: H2 + Br2 --> 2HBr. Because every 1 mol of H2 reacts with 1 mol of Br2, the stoichiometric amount of Br2 is equal to the moles of H2.

Ishita_Dubey_2D

Since it's a ratio, if you calculate it with delta G being positive, you will get the inverse of the ratio you would end up with if you used the negative delta G. It's not necessarily wrong, but it's easier to interpret the ratio if you just use a negative delta G.

Ishita_Dubey_2D

Have you heard about the chemist reading a book about helium?

He just couldn't put it down.

Ishita_Dubey_2D

To calculate the enthalpy of a reaction using bond enthalpies you would have to add together all of the bond enthalpies of new bonds formed (which will be a negative value because formation of bonds releases energy) and add this value to the total of the bond enthalpies of all of the bonds broken (w...

Ishita_Dubey_2D

Generally, to avoid rounding error, you should always keep additional significant figures in your calculations and round off only the final answer. I'm not completely sure why the book has a differently rounded answer, but it could be because the editors used values for the constants with less signi...

Ishita_Dubey_2D

Resonance is a combination of all possible structures of a molecule, even the ones that are less stable. Therefore, include structures with formal charges not equal to zero. The most prominent structure, however, will be the one with the lowest formal charges.

Ishita_Dubey_2D

On page 159 in the course reader it talks about salts as acids and bases. Certain ions display acidic or basic characteristics after dissolution. In the example you give, NH4Br dissociates into NH4+ and Br- in solution. Because NH4+ is an acid, it lowers the pH of the solution.

Ishita_Dubey_2D

In general, stronger acids are composed of more electronegative ions and larger ions.

Ishita_Dubey_2D

I was going to make a joke about sodium and hydrogen...

But NaH.

Ishita_Dubey_2D

What kind of fish is made out of only two sodium atoms?

2 Na

Ishita_Dubey_2D

One other thing to note is that even if a molecule has a symmetrical structure (i.e. tetrahedral), if the atoms surrounding the central atom are not equivalent, then the molecule will be polar (i.e H2ClBr2).

Ishita_Dubey_2D

When the cops pull you over, just do what Heisenberg does. When they ask you, tell them you don't how fast you were going, just where you were.

Ishita_Dubey_2D

Oxygen and Magnesium went out on a date... OMg!!!

Ishita_Dubey_2D

How exactly is effective nuclear charge calculated? And do electrons in the same orbital experience the same effective nuclear charge?

Ishita_Dubey_2D

There is no difference in energy in the orbitals only for Hydrogen because there are no electron-electron interactions since the atom only has one electron. Many-electron atoms, however, are not degenerate (their orbitals have different energies to due interactions between electrons).

Ishita_Dubey_2D

Hi! I may be pretty late to this but are you all planning on having another study session any time soon?

CHEMISTRY COMMUNITY

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