Search found 48 matches

by fara valdez
Sun Jun 10, 2018 11:15 pm
Forum: Significant Figures
Topic: Sig Figs in Heisenberg Uncertainty Principle
Replies: 3
Views: 300

Re: Sig Figs in Heisenberg Uncertainty Principle

How would you make this distinction in all problems?
by fara valdez
Sun Jun 10, 2018 11:15 pm
Forum: Significant Figures
Topic: Calculations
Replies: 3
Views: 195

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?
by fara valdez
Sun Jun 10, 2018 11:12 pm
Forum: Empirical & Molecular Formulas
Topic: Practice Problem
Replies: 2
Views: 198

Re: Practice Problem

What exactly is your question affiliates with this problem?? Do you need help with it all?
by fara valdez
Sun Jun 10, 2018 11:10 pm
Forum: Empirical & Molecular Formulas
Topic: E3
Replies: 2
Views: 178

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 .
by fara valdez
Sun Jun 10, 2018 11:04 pm
Forum: Empirical & Molecular Formulas
Topic: Test 1 Question 7
Replies: 3
Views: 260

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.
by fara valdez
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: 253

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
by fara valdez
Sun Jun 10, 2018 10:55 pm
Forum: Limiting Reactant Calculations
Topic: Question M8
Replies: 3
Views: 263

Re: Question M8

Do you need help with each question?
by fara valdez
Sun Jun 03, 2018 11:26 pm
Forum: Lewis Structures
Topic: Corbon Monoxide
Replies: 5
Views: 258

Re: Corbon Monoxide

Normally, always fufill the octet rule.
by fara valdez
Sun Jun 03, 2018 11:22 pm
Forum: Bond Lengths & Energies
Topic: Test 3 Q 8 [ENDORSED]
Replies: 9
Views: 446

Re: Test 3 Q 8 [ENDORSED]

does that apply to all bonds?
by fara valdez
Sun Jun 03, 2018 11:18 pm
Forum: Electronegativity
Topic: HW question 3.77
Replies: 3
Views: 244

Re: HW question 3.77

Fluorine has the highest electronegativity.
by fara valdez
Sun Jun 03, 2018 11:11 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of an acid
Replies: 14
Views: 555

Re: Strength of an acid

Im also interested in that question: is it standard that acids with longer bonds are stronger?
by fara valdez
Sun Jun 03, 2018 11:10 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of an acid
Replies: 14
Views: 555

Re: Strength of an acid

I think it relies on which bond is the most electronegative.
by fara valdez
Sun May 20, 2018 10:23 pm
Forum: Ionic & Covalent Bonds
Topic: Polarization
Replies: 7
Views: 295

Re: Polarization

I'm not that sure either, but I hope this helps!
https://www.askiitians.com/iit-jee-chem ... character/
by fara valdez
Sun May 20, 2018 10:21 pm
Forum: Ionic & Covalent Bonds
Topic: Test 3 [ENDORSED]
Replies: 7
Views: 263

Re: Test 3 [ENDORSED]

Is that for sure? If so, then would it be given?
by fara valdez
Sun May 20, 2018 10:20 pm
Forum: Sigma & Pi Bonds
Topic: Sigma Bonds
Replies: 5
Views: 236

Re: Sigma Bonds

However, what does it mean "for the extent of the overlap to be maximum?" I'm confused too.
by fara valdez
Sun May 20, 2018 10:17 pm
Forum: Dipole Moments
Topic: Meaning of a dipole
Replies: 7
Views: 192

Re: Meaning of a dipole

I think it is just the charge of that specific atom.
by fara valdez
Sun May 20, 2018 10:12 pm
Forum: Lewis Structures
Topic: 3.39
Replies: 5
Views: 197

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.
by fara valdez
Sun May 20, 2018 10:10 pm
Forum: Lewis Structures
Topic: Radicals
Replies: 1
Views: 74

Re: Radicals

You determine it by looking at the most electronegative atom.
by fara valdez
Sun May 13, 2018 10:47 pm
Forum: Lewis Structures
Topic: KCl Lewis formula
Replies: 6
Views: 536

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?
by fara valdez
Sun May 13, 2018 10:44 pm
Forum: Lewis Structures
Topic: Max Number of bonds
Replies: 2
Views: 73

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?
by fara valdez
Sun May 13, 2018 10:40 pm
Forum: Ionic & Covalent Bonds
Topic: 3.29
Replies: 6
Views: 221

Re: 3.29

What is the most frequent scenario in which this is used?
by fara valdez
Sun May 13, 2018 10:38 pm
Forum: Ionic & Covalent Bonds
Topic: Lewis Structure vs Resonance Structure
Replies: 6
Views: 166

Re: Lewis Structure vs Resonance Structure

Are we required to use both? Or are we allowed to choose?
by fara valdez
Sun May 13, 2018 10:37 pm
Forum: Ionic & Covalent Bonds
Topic: cation vs anion
Replies: 14
Views: 465

Re: cation vs anion

Maybe you can just remember that anions kind of sounds like "anti-ions" which obviously means negative.
by fara valdez
Sun May 13, 2018 10:33 pm
Forum: Ionic & Covalent Bonds
Topic: VALENCE ELECTRONS [ENDORSED]
Replies: 16
Views: 488

Re: VALENCE ELECTRONS [ENDORSED]

Yes, you have to use the number of valence electrons in order to conduct your Lewis dot diagrams.
by fara valdez
Sun Apr 29, 2018 11:12 pm
Forum: *Black Body Radiation
Topic: Black Body [ENDORSED]
Replies: 4
Views: 516

Re: Black Body [ENDORSED]

What is the chance of finding an object that can absorb light at any wavelength of frequency?
by fara valdez
Sun Apr 29, 2018 11:10 pm
Forum: Properties of Light
Topic: light as a particle
Replies: 3
Views: 190

Re: light as a particle

You're welcome!
by fara valdez
Sun Apr 29, 2018 11:08 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: The concept of Orbitals
Replies: 12
Views: 306

Re: The concept of Orbitals

what would the situation be to find the probability low rather than high?
by fara valdez
Sun Apr 29, 2018 11:06 pm
Forum: Properties of Electrons
Topic: electron mass
Replies: 15
Views: 569

Re: electron mass

If it is relevant, it will be provided for your calculations.
by fara valdez
Sun Apr 29, 2018 11:05 pm
Forum: Einstein Equation
Topic: converting from keV to joules
Replies: 7
Views: 290

Re: converting from keV to joules

I also get confused.
by fara valdez
Sun Apr 29, 2018 11:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Study Guide for Midterm? [ENDORSED]
Replies: 3
Views: 229

Re: Study Guide for Midterm? [ENDORSED]

What about study guides?
by fara valdez
Sun Apr 29, 2018 11:01 pm
Forum: Administrative Questions and Class Announcements
Topic: ATTACHING IMAGES TO POSTS? [ENDORSED]
Replies: 3
Views: 171

Re: ATTACHING IMAGES TO POSTS? [ENDORSED]

I believe you can also copy and paste.
by fara valdez
Sun Apr 22, 2018 10:17 pm
Forum: Properties of Light
Topic: Wavelengths
Replies: 8
Views: 250

Re: Wavelengths

Dr. Lavelle also mentioned that you should primarily know the order of increasing wavelengths.
by fara valdez
Sun Apr 22, 2018 10:13 pm
Forum: Properties of Light
Topic: Memorizing formulas test 2
Replies: 16
Views: 584

Re: Memorizing formulas test 2

More specifically, I mean in terms of knowing which formulas to use for specific problems. What about that?
by fara valdez
Sun Apr 22, 2018 10:12 pm
Forum: Properties of Light
Topic: light as a particle
Replies: 3
Views: 190

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...
by fara valdez
Sun Apr 22, 2018 10:08 pm
Forum: Properties of Light
Topic: Memorizing formulas test 2
Replies: 16
Views: 584

Memorizing formulas test 2

Does anyone know any easy/fun ways of memorizing the formulas that will be mentioned in test #2?
by fara valdez
Sun Apr 22, 2018 10:07 pm
Forum: Properties of Light
Topic: test 2
Replies: 18
Views: 593

Re: test 2

To my understanding, the test will not cover week 4.
by fara valdez
Sun Apr 22, 2018 10:05 pm
Forum: Properties of Light
Topic: Wavelength/frequency
Replies: 11
Views: 403

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.
by fara valdez
Sun Apr 15, 2018 10:51 pm
Forum: SI Units, Unit Conversions
Topic: What is the notation for molar mass?
Replies: 15
Views: 621

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.'
by fara valdez
Sun Apr 15, 2018 10:49 pm
Forum: SI Units, Unit Conversions
Topic: Sig Figs
Replies: 9
Views: 388

Re: Sig Figs

You should typically have/use an updated and accurate periodic table.
by fara valdez
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: 619

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.
by fara valdez
Sun Apr 15, 2018 10:46 pm
Forum: SI Units, Unit Conversions
Topic: Volume V Density [ENDORSED]
Replies: 5
Views: 272

Re: Volume V Density [ENDORSED]

As said, volume measures space in an object while density measures amount of matter in that object.
by fara valdez
Sun Apr 15, 2018 10:42 pm
Forum: SI Units, Unit Conversions
Topic: Quiz 1
Replies: 6
Views: 303

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.
by fara valdez
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: 216

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.
by fara valdez
Sun Apr 15, 2018 10:32 pm
Forum: Student Social/Study Group
Topic: Study Group
Replies: 8
Views: 426

Re: Study Group

This would be very helpful.
by fara valdez
Sun Apr 08, 2018 9:16 pm
Forum: Significant Figures
Topic: Amount of significant figures in calculations.
Replies: 2
Views: 113

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, ...
by fara valdez
Sun Apr 08, 2018 9:07 pm
Forum: Empirical & Molecular Formulas
Topic: Order of Elements in Empirical Formula [ENDORSED]
Replies: 4
Views: 1152

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...
by fara valdez
Sun Apr 08, 2018 8:57 pm
Forum: Balancing Chemical Reactions
Topic: Balancing the Equation
Replies: 9
Views: 413

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.

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