A ketone have an absorption peak centred around 1710cm^-1 . From this info deduce a value for the force constant,k, of the C=O double bond.

Question

aaronq · Answer

$E_n=hc\bar\nu=\hbar \sqrt{\dfrac{k}{μ}}(n + 1 )$

$\mu$= is the reduced mass

anonymous · Answer

Dont really understand

anonymous · Answer

I have 2 equations
One with c which is speed of light 
One without

aaronq · Answer

find the energy first (with the wavenumber) then find k, the spring constant

anonymous · Answer

how do i calculate energy?

anonymous · Answer

i got the reduced mass is 6.857

anonymous · Answer

Wavelength = frequency x planck constant?

anonymous · Answer

Energy not wavelength

anonymous · Answer

From wavenumber convert to wavelength. 
Using wavelength x frequency = c
then use frequency x planck's constant 
got me the value 3.399x10^-20

anonymous · Answer

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