#1
i need help with my chemistry work (my weakest subject).

given: yv=c (y is upside down) speed of light =3.00 x 10e8 mse-1
E=hv planek's constant = 6.625 x 10e-34 Js

convert 340 nm to frequency and photon energy

edit: e means exponent
grok it.

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Last edited by dubstar92 at Jun 3, 2008,
#2
wuh?
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#3
I'd help. Really you should look up the science thread. It makes me happy whenever that is bumped to the first page.

v=f lambda, you have lambda and v. Solve for f. Then plug f into E = hf.

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#5
Quote by dubstar92
i need help with my chemistry work (my weakest subject).

given: yv=c (y is upside down) speed of light =3.00 x 10e8 mse-1
E=hv planek's constant = 6.625 x 10e-34 Js

convert 340 nm to frequency and photon energy

edit: e means exponent


Okay, here's my attempt:

convert nm to m, so it comes out to 3.40 x 10e-7

then plug that into the yv=c equation.
(3.00 x 10e8 m/s)/(3.40 x 10e-7m) = v = 8.82 x 10e15 hz

now plug that into the E = hv equation
E=(6.625 x 10e-34)(8.82 x 10e15Hz) = 5.84 x 10e-18J

I think thats how you do it, but I'm not 100% sure
#6
Sorry,I tried.
I haven't been to a chemistry lesson in 2 months,and I'm skipping my exam.
So.Yeah,sorry