10
cm3 of a hydrocarbon was burnt in 70 cm3 of
oxygen (an excess) at 425K. After cooling to room temperature, the
gaseous mixture volume decreased from 90 cm3 to 50
cm3. A further reduction of 30 cm3 was
observed when the residual gas was passed through calcium
hydroxide. (All gas volumes are at the same temperature and
pressure).
What is the empirical formula
of the hydrocarbon?
A
C3H6
B
C3H8
C
C4H8
D
C4H10
in this qn right... we must use the Combustion
formula... but how to use the information of reduction of 30cm3 in
the residual gas??