is an air pollutant released
during burning of fossil fuels and from automobile exhaust'.
(a) Write
the names of elements present in this gas.
(b) What are
the valencies of sulphur in and 
?
(c) Find out
the number of molecules in 5moles of .
(d)
Calculate the number of moles in 320 g of gas.
(e)
Calculate the molar mass of 10 moles of sodium sulphite.
(Given : Atomic
masses of S = 32 u,= 16 u, Na = 23 u, NA = 6.022x 1023
per mole)
Answer:
(a) Sulphur
and oxygen
(b) Valency
of sulphur in 
Valency of
sulphur in 
(c) 5 x
Avogadro's number =5 x 6.022 x 1023 molecules
(d) m = 320 g,
M = 64 g 
moles
(e)Molar
mass of 10 moles of 
=10[ 23 x 2 +
32 + 16 x 3]
=1260g
You need to login to perform this action.
You will be redirected in
3 sec
