## Search found 48 matches

Sun Jun 10, 2018 11:15 pm
Forum: Significant Figures
Topic: Sig Figs in Heisenberg Uncertainty Principle
Replies: 3
Views: 343

### Re: Sig Figs in Heisenberg Uncertainty Principle

How would you make this distinction in all problems?
Sun Jun 10, 2018 11:15 pm
Forum: Significant Figures
Topic: Calculations
Replies: 3
Views: 279

### Calculations

I am under the impression sig figs for the tests do not take a toll on the grade, what if the correct number of sig figs being used alters our calculations which alters the answer to the problem?
Sun Jun 10, 2018 11:12 pm
Forum: Empirical & Molecular Formulas
Topic: Practice Problem
Replies: 2
Views: 291

### Re: Practice Problem

What exactly is your question affiliates with this problem?? Do you need help with it all?
Sun Jun 10, 2018 11:10 pm
Forum: Empirical & Molecular Formulas
Topic: E3
Replies: 2
Views: 278

### Re: E3

So the picture is confusing, but the atoms on the left are gallium and the ones on the right aren’t technically on the pan, which is why it is asking you how many there would need to be in order to equal the mass of the ones on the left .
Sun Jun 10, 2018 11:04 pm
Forum: Empirical & Molecular Formulas
Topic: Test 1 Question 7
Replies: 3
Views: 361

### Re: Test 1 Question 7

Just use conversions as you would grams to moles, except for the whole compound. Once youve reached that step in your conversion, then you isolate carbon in the CO2 conversion and Hydrogen in H2O.
Sun Jun 10, 2018 10:59 pm
Forum: Limiting Reactant Calculations
Topic: Limiting reagent of NH(3) +CuO------->N(2)+H2O+CO
Replies: 3
Views: 458

### Re: Limiting reagent of NH(3) +CuO------->N(2)+H2O+CO

Once you make your conversions, the smaller result is the limiting reagent and the larger one is excess. Subtract excess reagent by the overall excess reagent given
Sun Jun 10, 2018 10:55 pm
Forum: Limiting Reactant Calculations
Topic: Question M8
Replies: 3
Views: 368

### Re: Question M8

Do you need help with each question?
Sun Jun 03, 2018 11:26 pm
Forum: Lewis Structures
Topic: Corbon Monoxide
Replies: 5
Views: 413

### Re: Corbon Monoxide

Normally, always fufill the octet rule.
Sun Jun 03, 2018 11:24 pm
Forum: Sigma & Pi Bonds
Topic: Bond Strength/Bond Type
Replies: 3
Views: 405

### Re: Bond Strength/Bond Type

Sun Jun 03, 2018 11:22 pm
Forum: Bond Lengths & Energies
Topic: Test 3 Q 8 [ENDORSED]
Replies: 9
Views: 678

### Re: Test 3 Q 8[ENDORSED]

does that apply to all bonds?
Sun Jun 03, 2018 11:18 pm
Forum: Electronegativity
Topic: HW question 3.77
Replies: 3
Views: 345

### Re: HW question 3.77

Fluorine has the highest electronegativity.
Sun Jun 03, 2018 11:11 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of an acid
Replies: 14
Views: 846

### Re: Strength of an acid

Im also interested in that question: is it standard that acids with longer bonds are stronger?
Sun Jun 03, 2018 11:10 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of an acid
Replies: 14
Views: 846

### Re: Strength of an acid

I think it relies on which bond is the most electronegative.
Sun May 20, 2018 10:23 pm
Forum: Ionic & Covalent Bonds
Topic: Polarization
Replies: 7
Views: 537

### Re: Polarization

I'm not that sure either, but I hope this helps!
Sun May 20, 2018 10:21 pm
Forum: Ionic & Covalent Bonds
Topic: Test 3 [ENDORSED]
Replies: 7
Views: 481

### Re: Test 3[ENDORSED]

Is that for sure? If so, then would it be given?
Sun May 20, 2018 10:20 pm
Forum: Sigma & Pi Bonds
Topic: Sigma Bonds
Replies: 5
Views: 340

### Re: Sigma Bonds

However, what does it mean "for the extent of the overlap to be maximum?" I'm confused too.
Sun May 20, 2018 10:17 pm
Forum: Dipole Moments
Topic: Meaning of a dipole
Replies: 7
Views: 349

### Re: Meaning of a dipole

I think it is just the charge of that specific atom.
Sun May 20, 2018 10:12 pm
Forum: Lewis Structures
Topic: 3.39
Replies: 5
Views: 347

### Re: 3.39

Maybe you should look at how to determine the charge by the suffix of the words. Also, it helps to look at the periodic table.
Sun May 20, 2018 10:10 pm
Forum: Lewis Structures
Replies: 1
Views: 120

You determine it by looking at the most electronegative atom.
Sun May 13, 2018 10:47 pm
Forum: Lewis Structures
Topic: KCl Lewis formula
Replies: 6
Views: 783

### Re: KCl Lewis formula

This is a bit confusing. How would you exactly know, every time you conduct a lewis structure diagram, which element gives/receives, or when they share?
Sun May 13, 2018 10:44 pm
Forum: Lewis Structures
Topic: Max Number of bonds
Replies: 2
Views: 112

### Re: Max Number of bonds

I'm not exactly sure how to answer your question. I do not think you can have 4 bonds with a single element. If one combines with another, then it is just left at that.
Could you perhaps rephrase it?
Sun May 13, 2018 10:40 pm
Forum: Ionic & Covalent Bonds
Topic: 3.29
Replies: 6
Views: 291

### Re: 3.29

What is the most frequent scenario in which this is used?
Sun May 13, 2018 10:38 pm
Forum: Ionic & Covalent Bonds
Topic: Lewis Structure vs Resonance Structure
Replies: 6
Views: 262

### Re: Lewis Structure vs Resonance Structure

Are we required to use both? Or are we allowed to choose?
Sun May 13, 2018 10:37 pm
Forum: Ionic & Covalent Bonds
Topic: cation vs anion
Replies: 14
Views: 1236

### Re: cation vs anion

Maybe you can just remember that anions kind of sounds like "anti-ions" which obviously means negative.
Sun May 13, 2018 10:33 pm
Forum: Ionic & Covalent Bonds
Topic: VALENCE ELECTRONS [ENDORSED]
Replies: 16
Views: 930

### Re: VALENCE ELECTRONS[ENDORSED]

Yes, you have to use the number of valence electrons in order to conduct your Lewis dot diagrams.
Sun Apr 29, 2018 11:12 pm
Topic: Black Body [ENDORSED]
Replies: 4
Views: 693

### Re: Black Body[ENDORSED]

What is the chance of finding an object that can absorb light at any wavelength of frequency?
Sun Apr 29, 2018 11:10 pm
Forum: Properties of Light
Topic: light as a particle
Replies: 3
Views: 302

### Re: light as a particle

You're welcome!
Sun Apr 29, 2018 11:08 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: The concept of Orbitals
Replies: 12
Views: 522

### Re: The concept of Orbitals

what would the situation be to find the probability low rather than high?
Sun Apr 29, 2018 11:06 pm
Forum: Properties of Electrons
Topic: electron mass
Replies: 15
Views: 829

### Re: electron mass

If it is relevant, it will be provided for your calculations.
Sun Apr 29, 2018 11:05 pm
Forum: Einstein Equation
Topic: converting from keV to joules
Replies: 7
Views: 417

### Re: converting from keV to joules

I also get confused.
Sun Apr 29, 2018 11:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Study Guide for Midterm? [ENDORSED]
Replies: 3
Views: 320

### Re: Study Guide for Midterm?[ENDORSED]

Sun Apr 29, 2018 11:01 pm
Forum: Administrative Questions and Class Announcements
Topic: ATTACHING IMAGES TO POSTS? [ENDORSED]
Replies: 3
Views: 221

### Re: ATTACHING IMAGES TO POSTS?[ENDORSED]

I believe you can also copy and paste.
Sun Apr 22, 2018 10:17 pm
Forum: Properties of Light
Topic: Wavelengths
Replies: 8
Views: 371

### Re: Wavelengths

Dr. Lavelle also mentioned that you should primarily know the order of increasing wavelengths.
Sun Apr 22, 2018 10:13 pm
Forum: Properties of Light
Topic: Memorizing formulas test 2
Replies: 16
Views: 880

### Re: Memorizing formulas test 2

More specifically, I mean in terms of knowing which formulas to use for specific problems. What about that?
Sun Apr 22, 2018 10:12 pm
Forum: Properties of Light
Topic: light as a particle
Replies: 3
Views: 302

### Re: light as a particle

"Around 1700, Newton concluded that light was a group of particles (corpuscular theory). Around the same time, there were other scholars who thought that light might instead be a wave (wave theory). Light travels in a straight line, and therefore it was only natural for Newton to think of it as...
Sun Apr 22, 2018 10:08 pm
Forum: Properties of Light
Topic: Memorizing formulas test 2
Replies: 16
Views: 880

### Memorizing formulas test 2

Does anyone know any easy/fun ways of memorizing the formulas that will be mentioned in test #2?
Sun Apr 22, 2018 10:07 pm
Forum: Properties of Light
Topic: test 2
Replies: 18
Views: 867

### Re: test 2

To my understanding, the test will not cover week 4.
Sun Apr 22, 2018 10:05 pm
Forum: Properties of Light
Topic: Wavelength/frequency
Replies: 11
Views: 650

### Re: Wavelength/frequency

I guess it's the conservation of energy, if the speed changed then this would require an acceleration which would need energy to be put in or taken out of the wave.
Sun Apr 15, 2018 10:51 pm
Forum: SI Units, Unit Conversions
Topic: What is the notation for molar mass?
Replies: 15
Views: 1168

### Re: What is the notation for molar mass?

g/mol is mass, mole/liter is Molarity. They both are represented as 'M,' however when im doing my practice or hw problems i just write mass as 'mm.'
Sun Apr 15, 2018 10:49 pm
Forum: SI Units, Unit Conversions
Topic: Sig Figs
Replies: 9
Views: 583

### Re: Sig Figs

You should typically have/use an updated and accurate periodic table.
Sun Apr 15, 2018 10:48 pm
Forum: SI Units, Unit Conversions
Topic: writing out conversions in one long line vs. steps
Replies: 16
Views: 882

### Re: writing out conversions in one long line vs. steps

In high school, my chem teacher demonstrated the conversions in more of a chart form, it is easier to keep track of because it appears to be more organized and neat.
Sun Apr 15, 2018 10:46 pm
Forum: SI Units, Unit Conversions
Topic: Volume V Density [ENDORSED]
Replies: 5
Views: 416

### Re: Volume V Density[ENDORSED]

As said, volume measures space in an object while density measures amount of matter in that object.
Sun Apr 15, 2018 10:42 pm
Forum: SI Units, Unit Conversions
Topic: Quiz 1
Replies: 6
Views: 423

### Re: Quiz 1

I was also confused. I think that there should have been some sort of elaboration on it, or at least a clear demonstration of it.
Sun Apr 15, 2018 10:39 pm
Forum: SI Units, Unit Conversions
Topic: Do we have to convert final answer to make it simpler? [ENDORSED]
Replies: 4
Views: 292

### Re: Do we have to convert final answer to make it simpler?[ENDORSED]

You should typically put it in meters, however, it is up to the professor on what he may allow.
Sun Apr 15, 2018 10:32 pm
Forum: Student Social/Study Group
Topic: Study Group
Replies: 8
Views: 609

### Re: Study Group

Sun Apr 08, 2018 9:16 pm
Forum: Significant Figures
Topic: Amount of significant figures in calculations.
Replies: 2
Views: 147

### Re: Amount of significant figures in calculations.

Typically, the easiest way to recognize how many significant figures to use is first to know that any non-zero digits and any zero digits in between are significant digits. Leading zero-digits are not significant. Usually in the question, they may already use the amount of sig. figs. in the number, ...
Sun Apr 08, 2018 9:07 pm
Forum: Empirical & Molecular Formulas
Topic: Order of Elements in Empirical Formula [ENDORSED]
Replies: 4
Views: 3838

### Re: Order of Elements in Empirical Formula[ENDORSED]

We put the elements in order due to the fact that for empirical and molecular formulas in chemistry, the Hill System is in place. This states that carbon comes first, then hydrogen, and finally the rest of the elements in alphabetical order. Exceptions to this rule are order of elements in ionic com...
Sun Apr 08, 2018 8:57 pm
Forum: Balancing Chemical Reactions
Topic: Balancing the Equation
Replies: 9
Views: 645

### Re: Balancing the Equation

Typically, try starting with the smallest group of elements. Also, you can start with one containing oxygen, and if there isn't oxygen, try carbon.