CBSE Class 11-science Answered
Nine volumes of gaseous mixture consisting of a gaseous organic compound A and just sufficient amount of oxygen required for complete combustion yielded on burning 4 volumes of CO2 , 6 volumes of water vapour and 2 volumes of N2 all volumes measured at the same the same temprature and pressure. If the compund A contained carbon, hydrogen and nitrogen-
1)How many volumes of oxygen are required for complete combustion?
2)What is molecular formula of the compound A?
Asked by ambica14091995 | 16 May, 2011, 12:00: AM
Expert Answer
The balanced chemical equation can be written as:-
C2H4N2 + 3O2 ? 2CO2 + 2H2O + N2
(9-v) v 4 6 2
(i) The GAY LUSSAC'S LAW ,according to which the reactants are in whole number ratio which is equal to the mole ratio.
(9-v)/v=1/3
27-3v=v
27=4v
v=6.75mL
(ii) The molecular mass of compound A i.e. C2H4N2=(2×12)+(4×1)(2×14)=56g/mol.
Answered by | 24 Jun, 2011, 10:54: AM
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