## Search found 6 matches

Fri Oct 27, 2017 2:09 pm
Forum: Formal Charge and Oxidation Numbers
Replies: 8
Views: 903

### Re: Quick Question about SO4

404768057 wrote:Structure B is better because it shows that S has a lower formal charge when the double bonds are created which makes it more stable.

How do you determine is a structure is better than another?
Fri Oct 27, 2017 2:02 pm
Forum: Ionic & Covalent Bonds
Topic: Cations and Anions [ENDORSED]
Replies: 12
Views: 1236

### Re: Cations and Anions[ENDORSED]

Can anyone go into detail on exactly what the difference is between cations and anions? I am having difficulty differentiating the two.
Fri Oct 20, 2017 1:14 pm
Forum: DeBroglie Equation
Topic: When to use De Broglie Equation [ENDORSED]
Replies: 11
Views: 2606

### Re: When to use De Broglie Equation[ENDORSED]

To add onto this question, is there any way to connect finding the kinetic energy with the de Broglie equation? Since both contain mass, I wasn't sure if they could be used together.
Fri Oct 20, 2017 1:11 pm
Forum: DeBroglie Equation
Topic: λ=c/v VS. λ=h/mv
Replies: 9
Views: 5388

### Re: λ=c/v VS. λ=h/mv

You decide what equation to use based on the information you are given in the question. If the frequency is given in the equation and you want to find wavelength, use λ=c/v. In addition, if you are given energy in J and you need to find wavelength, you would use E = hv to find the frequency and the...
Wed Oct 04, 2017 3:01 pm
Forum: Empirical & Molecular Formulas
Topic: Identifying Empirical and Molecular Formulas [ENDORSED]
Replies: 13
Views: 5431

### Re: Identifying Empirical and Molecular Formulas[ENDORSED]

What are the differences between the Molecular and Empirical formulas? More specifically, how do you identify one from the other? I have a similar additional question to add to this post. When doing a problem, what is the best way to realize if I have found the molecular or empirical formula? Somet...
Wed Oct 04, 2017 2:57 pm
Forum: SI Units, Unit Conversions
Topic: Formula Units [ENDORSED]
Replies: 9
Views: 735

### Re: Formula Units[ENDORSED]

A formula unit is the group of ions that match the formula of the smallest unit of an ionic compound. When the question is asking for the number of formula units, the procedure is to first calculate the number of moles by dividing the mass of the sample given by the molar mass of the compound. Then...