import math
#initialisation of variables
Vs=23.95 #ml
Ve=34.75 #ml
#CALCULATIONS
fr=(Ve-Vs)/Ve
#RESULTS
fr=round(fr,3)
print 'fraction of nitrogen pentoxide remain unreacted after 1 hour=',fr
import math
#initialisation of variables
Ps=200.0 #mm
Pe=390.0 #mm
Pt=300.0 #mm
t=500.0 #sec
Pe1=400.0 #mm
#CALCULATIONS
r= (Pe1-Pt)/(Pe1 -Ps)
#RESULTS
print 'fraction remained undecomposed',r
import math
#initialisation of variables
V=1200.0 #ml
V1=100.0 #ml
t=300.0 # sec
#CALCULATIONS
r=V/t
t1=V1/r
#RESULTS
print 'time of residence of gas=',t1,'sec'
import math
#initialisation of variables
y=0.550
x=2400.0
d=0.00494
#CALCULATIONS
s=y/x
k=s*2.303/d
#RESULTS
k=round(k,3)
print 'k=',k,'lit molˆ−1 secˆ−1'
import math
from math import sqrt,pi
#initialisation of variables
T=393.7 #C
k=2.6*10** -4 # l i t molˆ−1 secˆ−1
R=1.987 # cal moleˆ−1 Kˆ−1
E=45.6 # kcal moleˆ−1
wl=3.5 #A
N=6*10**23 # molecules
R1=8.31*10 # ergs moleˆ−1 Kˆ−1
M=127.9 #g moleˆ−1
#CALCULATIONS
k=2*10**2*N*sqrt(pi*R1*(273.1+T)/M)*(wl*10**-8)**2*math.exp(-E*10**3/(R*(273.1+T)))
#RESULTS
k=round(k,4)
print 'second order rate for this constant=',k,'lit molˆ−1 secˆ−1'