# Fundemental Frequency units?

## Homework Statement

The fundamental vibrational frequency of gaseous 14N16O is 1904 cm-1.

a. Calculate the force constant, using the simple harmonic oscillator model

## Homework Equations

K=u((2pi)(v))^2 u=reduced mass

## The Attempt at a Solution

u=[(14)(16)/(30)] (1kg/6.02e^26)= 1.24e^-26 Kg/molecules

K=(1.24e^-26 kg)((2pi)(1904 cm^-1))^2= 1.77e^-22 kg m^2

How do I get the answer in N/m ??

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Matterwave
Gold Member
What does it mean when there is a frequency given in cm-1? Frequency should be given in Hz (or per time of some sort). Perhaps instead of "fundamental frequency" they meant "wave number/vector"?

cm^-1 is the wavenumber.

Matterwave