Search found 105 matches

by Curtis Tam 1J
Thu Oct 19, 2017 1:01 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Nodal Planes
Replies: 2
Views: 174

Nodal Planes

Are nodal planes related to nodes in the atom? I know that p, d, and f orbitals have nodal planes so does that contribute at all to the formation of nodes in an atom?

Thx!
by Curtis Tam 1J
Wed Oct 11, 2017 10:21 pm
Forum: Photoelectric Effect
Topic: Energy in kj or j when solving a problem?
Replies: 10
Views: 544

Re: Energy in kj or j when solving a problem?

504909047 wrote:I have a question regarding units. How do kg cancel out when divided by J?


J=kg*m^2*s^-2

So if, for example, you get a value joules divided by kg, then that would leave you with m^2*s^-2. Hope that helps!
by Curtis Tam 1J
Wed Oct 11, 2017 10:18 pm
Forum: Significant Figures
Topic: Sig Figs for Adding Scientific Notation
Replies: 1
Views: 143

Sig Figs for Adding Scientific Notation

So my question is how to determine sig figs for adding scientific notation WHEN the powers of 10 are different for the two numbers. For example: 1.66 x 10^-17 + 5.9 x 10^-18 = 2.25 x 10^-17 (Problem Ch 1 #33) Solution guide says that it's three sig figs. Is it because you have to "adjust" ...
by Curtis Tam 1J
Mon Oct 02, 2017 5:35 pm
Forum: Balancing Chemical Reactions
Topic: Order of steps
Replies: 6
Views: 500

Re: Order of steps

In a combustion reaction, balancing C and H should always go first. Since O2 is always by itself, it is easiest to balance this reactant last. In general, however, like what Jennah said, the element that occurs the least should be balanced first.
by Curtis Tam 1J
Mon Oct 02, 2017 5:27 pm
Forum: Empirical & Molecular Formulas
Topic: Self-Test M.4A (p.F114)
Replies: 3
Views: 347

Self-Test M.4A (p.F114)

"When 0.528 g of sucrose is burned, 0.306 g of water and 0.815 g of carbon dioxide are formed. Deduce the empirical formula of sucrose." I was able to get to the point where I could divide by the smallest number of moles. When I divided the number of moles of carbon by that number, I got a...

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