CHEMISTRY COMMUNITY

jlinwashington1B

so does this have anything to do with electronegativity?

jlinwashington1B

Do dipole moments determine where electron density is greater?

jlinwashington1B

What is a solvent

jlinwashington1B

Can somebody help me understand the correlations between Acids and bases and how to apply them into chemical concepts?

jlinwashington1B

Thank You

jlinwashington1B

How would we be able to distinguish between the two? I know pie bonds show polarity, but I need a bit more clarification of sigma bonds>

jlinwashington1B

If there are two negative charges, or two positive charges what does that mean in regards to dipole moments?

jlinwashington1B

Right...It's because the 5s orbital had already been filled up In Xenon's configuration.

jlinwashington1B

How is polarity determined? Is it via the unequal sharing of electrons?

jlinwashington1B

I am having trouble understanding the relationship between electrons and orbitals when trying to identify the hybridization. Can someone please help.

jlinwashington1B

The concept of moles can be used to measure molecules. Thus, the terms are used interchangeably.

jlinwashington1B

What is the difference between Lewis & Resonance structures?

jlinwashington1B

So (hypothetically) in the event that there is an electron configuration that exceeds 4s1, we would take an electron from the next orbital because the energy would be higher?

jlinwashington1B

There are many resonance structures that correlate with bond formation. However, it is important to make sure that when you create these structures to fulfill the octet rule.

jlinwashington1B

I was wondering the same thing because the s and p orbital is before the d orbital, right??

jlinwashington1B

I'm not really sure, but I know that it is losing an electron (considering the "+") which means that it is taken out of the s orbital.

jlinwashington1B

This equation is balanced on both sides... Each nitrogen has 2, while each hydrogen has 6 ( 2x3=6). Thus, this equation is not based on equivalence, but rather making sure that each element has the correct coefficients on both sides to get that stable balance.

jlinwashington1B

Can someone explain how to go about solving this. I know that Avogadro's number is used when solving for moles...

jlinwashington1B

Molar mass is the sum of the atomic mass (the elements listed on the periodic table).

jlinwashington1B

Will the number of sig figs determine if our answer is correct or incorrect?

jlinwashington1B

I have the same question... Does amplitude refer to the peak of the wave?

jlinwashington1B

I remember going over a problem in discussion that required algebra in order tp balance equations... Can someone help me to understand this concept?

jlinwashington1B

I know that E represents the energy of the photon, while the equation itself represents electron removal... In lecture today Professor Lavelle showed us an example of the electron removal from a metal. My question is can electrons be removed anywhere?

jlinwashington1B

Why would you just choose one of the products?

jlinwashington1B

With problems like these, are we always supposed to convert to meters?

jlinwashington1B

I'm also confused with how to solve this... When it says "how many moles of nitrogen", does that mean we have to find the mass of nitrogen and then multiply it by Avogadro's number?? Please help.

jlinwashington1B

Why is volume an extensive property, while density is intensive?

jlinwashington1B

Can someone please explain how we find the number to multiply by when making the molecular formula?

jlinwashington1B

CHEM 14B Lover wrote:For ideal gases, why is Cp 5/2R and Cv 3/2R

What does R refer to?

jlinwashington1B

Constant volume, and constant pressure... The problem should contain enough information to determine which one you should use.

jlinwashington1B

Yes, thats right !

jlinwashington1B

Just for clarification... the reaction is isothermal if delta U equals 0?

jlinwashington1B

how do we determine which is the anode and which is the cathode?

jlinwashington1B

If the oxidation number is greater in the product, then it lost electrons (oxidized). If the oxidation number is less, then it gained electrons (reduced).

jlinwashington1B

He is referring to the groups and their charges on the periodic table.

jlinwashington1B

A salt bridge is used to connect the oxidation and reduction half-cells of a galvanic cell.

jlinwashington1B

What is Ka2, in simple terms?

jlinwashington1B

When will water become a gas or solid?

jlinwashington1B

X can be ignored when k is less than 1x10^-3

jlinwashington1B

Nope, there won't be a change in the equilibrium constant.

jlinwashington1B

What does this principle refer to? Is it true that it predicts the change in equilibria?

jlinwashington1B

What is the 5% rule, and what does it refer to?

jlinwashington1B

when pressure increases, the reaction is attracted to the side with fewer moles.

jlinwashington1B

Is it true that k is unitless when dividing products by reactants ?

jlinwashington1B

Is there anyone doing study groups for the final ?

jlinwashington1B

Are we just to assume that a gas is an ideal gas ?

jlinwashington1B

f the value of K is less than 10^-3, what can we assume about the value ?

jlinwashington1B

What are cell diagrams used for and what are its components?

jlinwashington1B

What does this refer to, and what’s the equation for it?

jlinwashington1B

What should I know about bond angles ?

jlinwashington1B

Are there any one on one sessions ?

jlinwashington1B

What is the difference between open and closed systems ?

jlinwashington1B

Thanks!!

jlinwashington1B

What are CP and CP formulas?

jlinwashington1B

What's does enthalpies refer to?

jlinwashington1B

What does the formula PV=RnT refer to?

jlinwashington1B

Does Acid and bases have anything to do with equilibrium?

jlinwashington1B

What is pH and how do I find it?

jlinwashington1B

Does anyone know what the conjugate seesaw refers to ?

jlinwashington1B

What are acids & bases? What are conjugate acid & bases ?

jlinwashington1B

difference between liquids, solids, gases, and water in concentration ?

jlinwashington1B

905092269 wrote:I was wondering how many questions test one has? I was also wondering how many points will be taken off for simple mistakes (sig figs, units, etc.)?

When will the test take place? Does it cover both equilibrium and acids and bases?

jlinwashington1B

What is X on an ice table ?

jlinwashington1B

Does anyone know how to solve pH?

jlinwashington1B

What's the difference between Q & K

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