chemistry
posted by savannah .
calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 x 10^14 Hz. i have no idea how to even set this up. please someone help.

A common formula to change wavelength to frequency and frequency to wavelength uses the speed of light, c.
c = frequency x wavelength
c = 3E8 m/s 
so would i set it up (3.00 x 10^8)/(4.74 x 10^7) ?

Almost.The problem list frequency as 4.74E14 and not 4.74E7.
3E8 = 4.74E14*wavelength.
w = 3E8/4.74E14 = ? in meters.
Convert to nm. 
and what is the formula to convert to nm?

1E9 nm = 1 m