1. NaN₃ combusts in an air bag to produce sodium and nitrogen gas. If you need to inflate the
airbag 25L, how many grams of NaN₃ do you need at STP?
2.
3. What wavelength would you expect a light ray to have if it’s in a vacuum with a frequency of
5*10^9 Hz ?
4. The speed of light through water is 2.25*10^8m/s. If the wavelength is 3.0m, what is the
frequency in MHz (megahertz)?
5. What color would you expect to see in a vacuum from light with a frequency of 7*10^15 Hz?
(use color EMS graph from lecture).