CHEMISTRY COMMUNITY

Donavin Collins 1F

When there's a decrease in pressure, the side with the most moles is favored. And vice versa.

Donavin Collins 1F

The gas constant, R, is 8.314 J/mol·K I believe.

Donavin Collins 1F

The first test should include everything from Outline 1. I don't believe that we started Outline 2, but if we did then also part of Outline 2.

Donavin Collins 1F

Since X had such a small value, removing it wouldn't change anything. The x wouldn't have had a big enough change on the 0.10.

Donavin Collins 1F

Yes. Since pH + pOH = 14, you can find either one as long as you have the other.

Donavin Collins 1F

It's actually equal to one, not zero. Therefore, in the equation they have no effect.

Donavin Collins 1F

Since solids and liquids are considered pure substances, they wouldn't affect the equilibrium concentration.

Donavin Collins 1F

From my knowledge, the sig figs would be based off of the initial concentration and k constant.

Donavin Collins 1F

R is a gas constant and should be given to you on the formula sheet for tests.

Donavin Collins 1F

I need a bit of clarification for partial pressure. Is it only used for gases?

Donavin Collins 1F

I have a question about when to use K and Q. Also, what's the main difference between the two. Thank you. :)

Donavin Collins 1F

What's the difference between a bronsted acid and a conjugate acid?

Donavin Collins 1F

Does anyone know if we would be marked down for writing sp2 rather than 2sp2 and vice versa?

Donavin Collins 1F

What's the difference between cis and trans in chemistry? I've seen it around (like cisplatin and transplatin) but haven't really covered it yet.

Donavin Collins 1F

Does anyone have any last minute tips? It can be anything, like specific stuff that we should know for the final. Thanks!!

Donavin Collins 1F

Thank you!! And sorry lol, yeah I meant (ox).

Donavin Collins 1F

Can someone please explain to me what (en) and (os) mean in coordination compounds?

Donavin Collins 1F

Does anyone know if we would be marked down for writing out the compound or the name in the wrong order? Is there a specific order that they're supposed to be in?

Donavin Collins 1F

Is there an equation or method for knowing if an acid or base is strong? Or is there just a set list of strong acids and bases? If so, does anyone know where i can find that list? :)

Donavin Collins 1F

I have a quick question about two sessions, a workshop and step-up, which are set to be on Sunday night in Covel. Are they meant to be on Saturday night since we would have already took our final by that time? Or is it just extra review for those who are taking Chem 14B next quarter?

Donavin Collins 1F

Can someone please clarify which outlines we're allowed to solve problems from for weeks 9 and 10?

Donavin Collins 1F

Hello, I have a question about the difference between 2sp3 and sp3. How do you know if the "2" in front of the sp3 is supposed to be there? What's the difference between the two?

Donavin Collins 1F

Yes, the molecule should be linear.

Donavin Collins 1F

Yes, hydrogen bonding only occurs with the nitrogen, oxygen, and fluorine elements.

Donavin Collins 1F

I would use bent since Lavelle uses that term more often.

Donavin Collins 1F

For Test 2, I received full points for simply writing the sigma and pi signs above or below the bond line. Just remember to put a sigma bond sign around every bond line since every bond contains a sigma bond.

Donavin Collins 1F

How does electronegativity affect a bond?

Donavin Collins 1F

A bent shape can have up to 2 lone pairs.

Donavin Collins 1F

On the periodic table, as you go from left to right the electronegativity increases. And as you go from top to bottom, the electronegativity decreases.

Donavin Collins 1F

When there is a single bond, there is one sigma bond. When there is a double bond, there is one sigma bond and one pi bond. When there is a triple bond, there is one sigma bond and two pi bonds.

Donavin Collins 1F

A resonance structure is simply when a molecule can be drawn as a Lewis structure in more than one way.

Donavin Collins 1F

I'm a bit confused on what exactly is going to be on test 2. Can someone explain to me what's going to be on it? Thank you.

Donavin Collins 1F

Hydrogen bonds are weaker than ionic and covalent bonds.

Donavin Collins 1F

When there is a double bond, the attraction between the two atoms is stronger which pulls them closer together. Triple bonds pull the atoms together even closer because the attraction is stronger than a double bond.

Donavin Collins 1F

They're both interchangeable.

Donavin Collins 1F

If the ionic bond is in water, then the covalent bond is stronger. If it's out of water, then the ionic bond is stronger.

Donavin Collins 1F

As long as the electrons are correctly represented, the shape shouldn't matter for now.

Donavin Collins 1F

If it's between 1.5 and 2, there isn't a way to make a solid conclusion.

Donavin Collins 1F

The electronegativity increases as it goes up the groups and across the periods.

Donavin Collins 1F

From my knowledge, I believe that the state of the element is info that is given.

Donavin Collins 1F

The homework due this week should be from outline 3. We haven't completely finished the section yet.

Donavin Collins 1F

What is a resonance structure?

Donavin Collins 1F

How do you draw a Lewis structure?

Donavin Collins 1F

What's the difference between a sigma and pi bond?

Donavin Collins 1F

How can you tell if a bond is ionic or covalent?

Donavin Collins 1F

Does the bond length have any effect on the bond itself?

Donavin Collins 1F

Hello, I'm wondering how exactly you know when it's an ionic bond or a covalent bond. Thank you.

Donavin Collins 1F

The first bond is a sigma bond, and then the next two would be pi bonds.

Donavin Collins 1F

Yes, I believe that covalent bonds are only between two nonmetals.

Donavin Collins 1F

I think that we should be able to do problems from both sections.

Donavin Collins 1F

Since the double bond creates a stronger bond, the attraction pulls the atoms closer together which shortens the length of the bond.

Donavin Collins 1F

I have a quick question about the DeBroglie Equation. When exactly do we use it and what units does it deal with? Thank you!! :)

Donavin Collins 1F

Hello :) I'm kinda confused about when exactly we use the Einstein Equation. Also, is it something that's used a lot? Thank you!

Donavin Collins 1F

I believe it wouldn't matter too much if you used grams or kgs, as long as it isn't specified to use a specific unit.

Donavin Collins 1F

I did this problem last week, and assuming that I'm correct I explained that the "extent of the change" (which is basically slope) decreases since the waves are more spread out. If the frequency were to increase, then the waves would be more squeezed together which creates a greater slope/...

Donavin Collins 1F

It's best to make sure you understand every/most concepts before moving onto the next. That way, you don't have to go back and start over. I would also recommend doing homework problems after you're finished as a way to quiz yourself.

Donavin Collins 1F

What exactly are black body and black body radiation? Also, when do they come up/are necessary?

Donavin Collins 1F

What exactly is a photon?

Donavin Collins 1F

Does anyone know if sig figs were marked down if wrong?

Donavin Collins 1F

It would be more useful to do the homework problems while you're reading the chapters.

Donavin Collins 1F

Why isn't an Angstrom considered an SI unit?

Donavin Collins 1F

When combustion occurs, can anything else be a product besides H2O and CO2?

Donavin Collins 1F

Since we're looking for the lowest multiple for coefficients, would it be possible to divide? Or are you only allowed to multiply? (For example, would you be able to switch from 2H2O to just H2O?)

Donavin Collins 1F

Does a compound being aqueous, or any other physical state, affect the process of balancing a chemical reaction? Or is it just a detail that doesn't affect the problem?

Donavin Collins 1F

Can someone briefly explain sig figs? My current understanding is that it's when you round to a certain place (tenth, hundredth...), but this is a topic that I never really understood. Also, is there is certain area of chemistry where you use it frequently? Thanks.

Donavin Collins 1F

When compared to ionic bonds IN water, covalent bonds are stronger.

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