CHEMISTRY COMMUNITY

Natalie_Martinez_1I

But in other problems there have been compounds that included oxygen in the empirical formula so how can we assume that O2 is the only thing that contributes to all the oxygen?

Natalie_Martinez_1I

Is a coordination number the same thing as the # of ligands bound to an atom?

Natalie_Martinez_1I

For this question how are we supposed to know that oxygen isn't in the empirical formula of nicotine?

Natalie_Martinez_1I

Are oxidation number and ionic charge the same? Like is the charge of an anion the same thing as its oxidation number?

Natalie_Martinez_1I

Where do you place the extra electron in a radical? Does it always go on the central atom?

Natalie_Martinez_1I

By this same logic, how many valence electrons would copper? can someone explain please

Natalie_Martinez_1I

Yes all substances have London forces, because all molecules have the possibility of having dipole moments which I think are the same thing as London dispersion forces.

Natalie_Martinez_1I

It does thank you so much!

Natalie_Martinez_1I

Oops #6, not 5

Natalie_Martinez_1I

Does anyone know what the correct answer for #5 on test 2 is? I'm trying to review but I'm not sure if there is a key for the past tests?

Natalie_Martinez_1I

Are ligands just any molecule that has lone pairs?

Natalie_Martinez_1I

Potassiumpermanganate,KMnO4,isaninorganicchemicalcompoundusedfor cleaning wounds. 5.00 g of KMnO4 is dissolved in a 150.00 mL flask of water. If 20.00 mL of this solution is removed and placed in a new 2nd 250.00 mL flask and filled with water, what is the concentration of the solution in the 2nd fl...

Natalie_Martinez_1I

Is there an easy trick to memorizing the names of molecular structures?

Natalie_Martinez_1I

Is this topic going to be on the final?

Natalie_Martinez_1I

I'm confused like on the number of valence electrons of transition metals. For example why does Ti have 4 valence electrons if it only has 2 electrons in the s orbital and none in the p?

Natalie_Martinez_1I

Are there only certain atoms that can triple/double bond or how can we determine which can?

Natalie_Martinez_1I

Are we also going to have to draw lewis structures for test 3?

Natalie_Martinez_1I

How did you find the uncertainty in the momentum for this problem?

Natalie_Martinez_1I

I'm confused by a previous reply that says that says that 3d is higher in energy that the 4s orbital. I thought it was the other way around?

Natalie_Martinez_1I

Because the electrons are in the same shell there's less shielding from the protons so they are more tightly held making the atomic radius smaller across a period.

Natalie_Martinez_1I

I was looking back at the fundamentals and I kept seeing the phrase "formula units." When a question asks you to find a quantity in terms of formula units does that just mean in terms of atoms?

Natalie_Martinez_1I

So do we have to know like the wavelengths and other values corresponding to each series?

Natalie_Martinez_1I

There are 4 different quantum numbers and each gives you an idea of where the electron is located in an atom. 2 electrons can't share more than 3 numbers because that would mean that they are in the same location which is not possible because they would repel each other due to like charges.

Natalie_Martinez_1I

Professor Lavelle used half arrows in lecture and the inert gas goes first and then the remaining electrons are written out.

Natalie_Martinez_1I

Can someone explain how they got #2 on the test?

Natalie_Martinez_1I

Can someone explain the photoelectric effect and its significance?

Natalie_Martinez_1I

Is the test gonna be curved?

Natalie_Martinez_1I

Accuracy tells you how close you are to the the true value, whereas precision indicates how close measurements are to one another.

Natalie_Martinez_1I

How do you calculate the molar mass of substance?

Natalie_Martinez_1I

Can 6.022x10^23 be used in calculations to represent both the number of molecules in a mole and atoms in a mole of a substance? Like can you use 6.022x10^23 atoms to represent a mole or only 6.022x10^23 molecules to represent a mole?

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Midterm Q3

Coordination Number

Midterm Q3

Oxidation Number

Radicals

Re: Transition Metal Valence Electrons

Re: london forces

Re: Midterm 1 Q!C

Re: Test 2, #5

Test 2, #5

Ligands

Midterm 1 Q!C

Naming Structures

Re: Ligands

Transition Metal Valence Electrons

Double/Triple Bonds

Re: Test 3

Re: HW #1.43

Re: 3d before 4s

Re: Atomic Radius [ENDORSED]

formula units [ENDORSED]

Re: Balmer and Lyman Series

Re: Four Different Quantum Numbers

Re: How to properly format your answers

Test 1 Q2

Photoelectric Effect

Re: Test Number 1

Re: Accuracy vs Precision

Molar Mass

Avagrado's Number [ENDORSED]