The answer is 18 you multiply wavelength (6) times frequency (3)
What your question for number 3
Density is proportional to molar mass, assuming pressure and
temperature remain constant. Therefore, since CO has a molar mass of 28
and CO2 has a molar mass of 44:
The relative density of CO vs air is 28/29 = 0.9655.
The relative density of CO2 vs air is 44/29 = 1.517.
just say this: the green color is from the mold
