## Search found 115 matches

Mon Oct 14, 2019 6:32 pm
Forum: *Shrodinger Equation
Topic: Midterm
Replies: 14
Views: 400

### Re: Midterm

No, there's only one midterm.
Mon Oct 14, 2019 6:28 pm
Forum: Properties of Light
Topic: Symbol review
Replies: 3
Views: 43

### Re: Symbol review

Ψ (psi)= wave function
Mon Oct 14, 2019 5:36 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Positive and Negative signs?
Replies: 5
Views: 71

### Re: Positive and Negative signs?

I believe that if energy is leaving a system or if the force and displacement are moving in the opposite direction, then we use a negative sign to represent that. And vice versa if energy is entering a system, or the force and displacement are moving in the same direction, we would use a positive si...
Mon Oct 14, 2019 5:27 pm
Forum: *Shrodinger Equation
Topic: Shrodinger Equation
Replies: 1
Views: 38

### Re: Shrodinger Equation

Psi represents the height of a wave at a specific position such as x, y, or z. The wave of this function is represents as a sine function. Psi squared represents the probability of finding an electron, and this value is always positive. Also, for Psi squared, the peak of the wave has a high probabil...
Thu Oct 10, 2019 7:53 pm
Forum: Properties of Light
Topic: Frequency
Replies: 2
Views: 64

### Re: Frequency

"v" comes from the Greek symbol "nu" (v) which is used to represent the frequency of a light wave.
Hope this helps!
Thu Oct 10, 2019 7:48 pm
Forum: Limiting Reactant Calculations
Topic: M7
Replies: 1
Views: 70

### Re: M7

You would first start off by converting the 125kg of B2O3 to grams so you should get 125x10^3g B2O3. You would then multiply that value by 1 mole of B2O3/ 69.619g B2O3, times 2 mol B/1mol B2O3 (gotten from the balanced equation), times 10.811 g B/1 mol B. You should get the answer 3.88x10^4 g B prod...
Thu Oct 10, 2019 7:38 pm
Forum: Student Social/Study Group
Topic: Pen or Pencil for Homework Problems?
Replies: 8
Views: 119

### Re: Pen or Pencil for Homework Problems?

There is nothing on the syllabus that says whether we should use a pen or pencil on the homework assignments, so you can use either one.
Mon Oct 07, 2019 4:39 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical Formula Help [ENDORSED]
Replies: 7
Views: 272

### Re: Empirical Formula Help[ENDORSED]

After you find the amount of moles in each element, you divide the mole values you found by the smallest number of moles calculated. After this step, the outcomes of your division (which should be rounded to whole numbers, if possible) will determine the values for the empirical formula. If your out...
Mon Oct 07, 2019 3:33 pm
Forum: Limiting Reactant Calculations
Topic: Percent yield
Replies: 3
Views: 63

### Percent yield

How would you calculate theoretical yield without being given the percent or actual yield? Would you just multiply moles by the molar mass ?
Mon Oct 07, 2019 3:15 pm
Forum: Balancing Chemical Reactions
Topic: Homework Question H21
Replies: 5
Views: 114

### Re: Homework Question H21

2 C10H15N (s) + 26 O2 --> 19 CO2 (g) + 13 H20 (l) + CH4N2O (aq)
Sun Sep 29, 2019 2:24 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 150
Views: 11360

### Re: Advice from a Medical Student - Part II[ENDORSED]

Thank you for sharing your insight on your journey in medical school! It's always inspiring to read about students who are taking a similar career pathway as me and see their view on this career and the different steps they take. I am also not sure what field I would want to specialize in, but am lo...
Sun Sep 29, 2019 2:17 pm
Forum: Significant Figures
Topic: Significant figures clarification
Replies: 3
Views: 91

### Significant figures clarification

I need some clarification on basic sigfig rules. For example if we end up with the number 0.126358352 after a calculation, how would the correct answer be 1.264 x 10^-2 ?
Sun Sep 29, 2019 2:03 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Mole
Replies: 1
Views: 62

### Re: Mole

One reason Avogadro chose carbon-12 to determine a mole is because when compared to other elements on the periodic table, carbon-12's atomic mass is measured particularly accurate. Also, a mole is the number of atoms in exactly 12g of carbon-12, which has become the standard for determining a mass o...
Sun Sep 29, 2019 1:52 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical Formula
Replies: 6
Views: 81

### Re: Empirical Formula

Using the empirical formula rather than the molecular formula is based on what you want to determine from the compound. It's important to use the empirical formula if you want to know the relative number of atoms in a molecule, rather than the actual number of atoms (which is the molecular formula)....
Fri Sep 27, 2019 6:13 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent
Replies: 29
Views: 3662

### Re: Ionic vs Covalent

I also agree that ionic bonds are stronger than covalent bonds.