Chapter 17:Chemistry in the Atmosphere

Example no:17.1,Page no:774

In [2]:
#Variable declaration
E=498.7*10**3/(6.022*10**23) #energy in J/molecule
h=6.63*10**-34               #plancks constant, J s

#Calculation
v=E/h #frequency of the photon, s**-1
lamda=3*10**8/v #wavelength in m, since v*lambda=speed of light in vacuum

#Variable declaration
print"The maximum wavelength of the photon which can dissociate an O2 molecule is :",round(lamda*10**9),"nm"

The maximum wavelength of the photon which can dissociate an O2 molecule is : 240.0 nm

Example no:17.3,Page no:792

In [5]:
#Variable declaration
Rninitial=1 #initial mass of Rn, g

#Calculation
Rnfinal=Rninitial*0.5**10 #final mass of Rn, g

#Result
print"The amount of Rn left after 10 half lives is :%.1e"%Rnfinal,"g"

The amount of Rn left after 10 half lives is :9.8e-04 g