Search found 30 matches

by Natalie_Martinez_1I
Thu Jun 14, 2018 1:53 am
Forum: Empirical & Molecular Formulas
Topic: Midterm Q3
Replies: 3
Views: 220

Re: Midterm Q3

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?
by Natalie_Martinez_1I
Wed Jun 13, 2018 5:52 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 2
Views: 150

Coordination Number

Is a coordination number the same thing as the # of ligands bound to an atom?
by Natalie_Martinez_1I
Wed Jun 13, 2018 4:50 pm
Forum: Empirical & Molecular Formulas
Topic: Midterm Q3
Replies: 3
Views: 220

Midterm Q3

For this question how are we supposed to know that oxygen isn't in the empirical formula of nicotine?
by Natalie_Martinez_1I
Wed Jun 13, 2018 3:51 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation Number
Replies: 1
Views: 141

Oxidation Number

Are oxidation number and ionic charge the same? Like is the charge of an anion the same thing as its oxidation number?
by Natalie_Martinez_1I
Wed Jun 13, 2018 3:48 pm
Forum: Resonance Structures
Topic: Radicals
Replies: 1
Views: 136

Radicals

Where do you place the extra electron in a radical? Does it always go on the central atom?
by Natalie_Martinez_1I
Wed Jun 13, 2018 3:28 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Transition Metal Valence Electrons
Replies: 3
Views: 159

Re: Transition Metal Valence Electrons

By this same logic, how many valence electrons would copper? can someone explain please
by Natalie_Martinez_1I
Wed Jun 13, 2018 3:27 pm
Forum: Dipole Moments
Topic: london forces
Replies: 7
Views: 290

Re: london forces

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.
by Natalie_Martinez_1I
Wed Jun 13, 2018 3:24 pm
Forum: Molarity, Solutions, Dilutions
Topic: Midterm 1 Q!C
Replies: 2
Views: 169

Re: Midterm 1 Q!C

It does thank you so much!
by Natalie_Martinez_1I
Wed Jun 13, 2018 12:09 pm
Forum: DeBroglie Equation
Topic: Test 2, #5
Replies: 1
Views: 124

Re: Test 2, #5

Oops #6, not 5
by Natalie_Martinez_1I
Wed Jun 13, 2018 12:08 pm
Forum: DeBroglie Equation
Topic: Test 2, #5
Replies: 1
Views: 124

Test 2, #5

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?
by Natalie_Martinez_1I
Wed Jun 13, 2018 11:10 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 2
Views: 165

Ligands

Are ligands just any molecule that has lone pairs?
by Natalie_Martinez_1I
Wed Jun 13, 2018 3:18 am
Forum: Molarity, Solutions, Dilutions
Topic: Midterm 1 Q!C
Replies: 2
Views: 169

Midterm 1 Q!C

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...
by Natalie_Martinez_1I
Sun Jun 03, 2018 4:18 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Naming Structures
Replies: 8
Views: 225

Naming Structures

Is there an easy trick to memorizing the names of molecular structures?
by Natalie_Martinez_1I
Sun Jun 03, 2018 4:13 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 8
Views: 245

Re: Ligands

Is this topic going to be on the final?
by Natalie_Martinez_1I
Sun Jun 03, 2018 4:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Transition Metal Valence Electrons
Replies: 3
Views: 159

Transition Metal Valence Electrons

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?
by Natalie_Martinez_1I
Mon May 28, 2018 7:44 pm
Forum: Ionic & Covalent Bonds
Topic: Double/Triple Bonds
Replies: 8
Views: 282

Double/Triple Bonds

Are there only certain atoms that can triple/double bond or how can we determine which can?
by Natalie_Martinez_1I
Sun May 20, 2018 9:38 pm
Forum: Bond Lengths & Energies
Topic: Test 3
Replies: 8
Views: 236

Re: Test 3

Are we also going to have to draw lewis structures for test 3?
by Natalie_Martinez_1I
Tue May 08, 2018 8:58 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: HW #1.43
Replies: 8
Views: 414

Re: HW #1.43

How did you find the uncertainty in the momentum for this problem?
by Natalie_Martinez_1I
Sun May 06, 2018 11:33 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d before 4s
Replies: 9
Views: 260

Re: 3d before 4s

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?
by Natalie_Martinez_1I
Sun May 06, 2018 11:28 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius [ENDORSED]
Replies: 4
Views: 153

Re: Atomic Radius [ENDORSED]

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.
by Natalie_Martinez_1I
Sun May 06, 2018 7:52 pm
Forum: SI Units, Unit Conversions
Topic: formula units [ENDORSED]
Replies: 68
Views: 21952

formula units [ENDORSED]

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?
by Natalie_Martinez_1I
Sun Apr 29, 2018 10:47 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Balmer and Lyman Series
Replies: 9
Views: 563

Re: Balmer and Lyman Series

So do we have to know like the wavelengths and other values corresponding to each series?
by Natalie_Martinez_1I
Sun Apr 29, 2018 10:45 pm
Forum: Quantum Numbers and The H-Atom
Topic: Four Different Quantum Numbers
Replies: 7
Views: 225

Re: Four Different Quantum Numbers

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.
by Natalie_Martinez_1I
Sun Apr 29, 2018 9:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: How to properly format your answers
Replies: 6
Views: 135

Re: How to properly format your answers

Professor Lavelle used half arrows in lecture and the inert gas goes first and then the remaining electrons are written out.
by Natalie_Martinez_1I
Sun Apr 22, 2018 7:38 pm
Forum: Molarity, Solutions, Dilutions
Topic: Test 1 Q2
Replies: 2
Views: 156

Test 1 Q2

Can someone explain how they got #2 on the test?
by Natalie_Martinez_1I
Sun Apr 22, 2018 7:36 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 4
Views: 123

Photoelectric Effect

Can someone explain the photoelectric effect and its significance?
by Natalie_Martinez_1I
Sun Apr 22, 2018 7:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Test Number 1
Replies: 10
Views: 431

Re: Test Number 1

Is the test gonna be curved?
by Natalie_Martinez_1I
Sun Apr 08, 2018 9:37 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Accuracy vs Precision
Replies: 23
Views: 702

Re: Accuracy vs Precision

Accuracy tells you how close you are to the the true value, whereas precision indicates how close measurements are to one another.
by Natalie_Martinez_1I
Sun Apr 08, 2018 9:24 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass
Replies: 9
Views: 399

Molar Mass

How do you calculate the molar mass of substance?
by Natalie_Martinez_1I
Sun Apr 08, 2018 9:14 pm
Forum: SI Units, Unit Conversions
Topic: Avagrado's Number [ENDORSED]
Replies: 6
Views: 312

Avagrado's Number [ENDORSED]

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?

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