# Chapter 26 :Solutions¶

## Example 26.1 , Page no:158¶

In [1]:
import math
from __future__ import division

#initialisation of variables
a=(3/2)*100;

#RESULTS
print"Volume of O2 =",round(a,3);

Volume of O2 = 150.0


## Example 26.2 , Page no:159¶

In [2]:
import math
from __future__ import division

#initialisation of variables
a=200/122.56;
b=2.45*22.4;

#RESULTS
print"Moles =",round(a,3);
print"Volume =",round(b,3);

Moles = 1.632
Volume = 54.88


## Example 26.3 , Page no:159¶

In [3]:
import math
from __future__ import division

#initialisation of variables
a=2/22.4;
b=0.179*84;

#RESULTS
print"Moles =",round(a,3);
print"Mass =",round(b,3);

Moles = 0.089
Mass = 15.036


## Example 26.4 , Page no:159¶

In [4]:
import math
from __future__ import division

#initialisation of variables
p=1; #atm
v=1000; #volume in litres
t=673; #Kelvin
R=0.0821; #constant in atm-l/mole-K

#CALCULATIONS
n=(p*v)/(R*t); #calculating n
n1=6.03*159.7;
n2=12.1*55.85;

#RESULTS
print"n =",round(n,3);
print"Mass =",round(n1,3);
print"Mass of Fe =",round(n2,3);

n = 18.098
Mass = 962.991
Mass of Fe = 675.785


## Example 26.5 , Page no:159¶

In [5]:
import math
from __future__ import division

#initialisation of variables
N=14.01; #mass of N
H=1.008; #mass of H

#CALCULATIONS
m=N+(3*H); #calculating mass
moles=1/m;  #cal moles
v=moles*22.4; #cal vol
v1=(1*1.32*373)/(1.2*273);

#RESULTS
print"Volume =",round(v,3);
print"V2 =",round(v1,3);

Volume = 1.315
V2 = 1.503


## Example 26.6 , Page no:159¶

In [6]:
import math
from __future__ import division

#initialisation of variables
p=4; #atm
v=40; #volume in litres
t=773; #Kelvin
u=238.03; #mass of U
f=19.00; #mass of F
R=0.0821; #constant in atm-l/mole-K

#CALCULATIONS
n=(p*v)/(R*t); #calculating n
m=u+(6*f); #cal mass
m1=m*2.52;

#RESULTS
print"n =",round(n,3);
print"Mass =",round(m1,3);

n = 2.521
Mass = 887.116


## Example 26.7 , Page no:159¶

In [7]:
import math
from __future__ import division

#initialisation of variables
p=0.263*10**5; #Pascal
v=120; #volume in m cube
t=223; #Kelvin
R=8.31; #constant

#CALCULATIONS
n=(p*v)/(R*t); #calculating n
m=n*4; #cal mass of He

#RESULTS
print"n =",round(n,3);
print"Mass of He =",round(m,3);

n = 1703.065
Mass of He = 6812.258


## Example 26.8 , Page no:160¶

In [8]:
import math
from __future__ import division

#initialisation of variables
c=12.01;
h=1.008;
v=22.4; #vol

#CALCULATIONS
m=(2*c)+(4*h); #cal mass
d=m/v; #cal density

#RESULTS
print"Density in g/litre =",round(d,3);

Density in g/litre = 1.252


## Example 26.9 , Page no:160¶

In [9]:
import math
from __future__ import division

#initialisation of variables
p=5; #atm
v=1; #volume in litres
t=293; #Kelvin
R=0.0821; #constant in atm-l/mole-K

#CALCULATIONS
n=(p*v)/(R*t); #calculating n
m=n*32; #moles of O2
d=m/v; #cal density

#RESULTS
print"n =",round(n,3);
print"Moles of O2 =",round(m,3);
print"Density in g/litre =",round(d,3);

n = 0.208
Moles of O2 = 6.651
Density in g/litre = 6.651


## Example 26.10 , Page no:160¶

In [10]:
import math
from __future__ import division

#initialisation of variables
a=28.1/0.214;

#RESULTS
print"Molecular mass =",round(a,3);

Molecular mass = 131.308