When I look up Snell's law on Wikipedia it says
\frac{\sin \theta_1}{\sin \theta_2}=\frac{v_1}{v_2}=\frac{n_2}{n_1}
Why does the subscript change in the n_n ? Isnt v_1=n_1 and v_2=n_2?
Thanks for answering
Homework Statement
Given a three layer model
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v_1=1.5km/s
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v_2=1.3km/s
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v_3=2.0km/s
Assume a ray goes through layer 1 and hits the interface...
Excellent! So, I got 1,9804\times 10^{-9}\mbox{ moles/second}. So the amount of Na and Cl that crystallizes each second would be 6,0221415\times 10^{23}\times 1,9804\times 10^{-9}=1,1926\times 10^{15}. I guess that since the mole ratio is 1:1, Na^{+}=\frac{1,1926\times 10^{15}}{2}\mbox{, }...
Ok, so I have MM_{NaCl}=58.44277 \text{g/mol}, and I guess I have will have to find the amount of moles; n=\frac{30\times 10^{-3}}{58.44277}=5,1332\times 10^{-4}. So far so good? Would the next thing be to do \frac{5,1332\times 10^{-4}}{3*24*60^2}, to get the number of moles crystallized per second?
If a salt crystal forms after 3 days of evaporation, and the crystal mass is 30 mg, how many Na+ and Cl- ions was added to the crystal each second (average). How do I solve this?
Hello all,
I had chemistry a long time ago, but now I am very rusty at it :frown: so I am hoping you can get me started with this problem I have;
A particular solution of ammonia (Kb = 1.8 x 10-5) has a pH of 8.3.
What is the concentration of ammonia in this solution?
Is it the...