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95 " mL of " a mixture of a gaseous orga...

95 " mL of " a mixture of a gaseous organic compound A and just sufficient amount of oxygen required for the complete yields on burning 40 " mL of " `CO_2` and 70 " mL of " water vapour along with 10 " mL of " nitrogen,volumes measured at the same temperature and pressure. Compound A contains corbon, hydrogen, and nitrogen only as the constituent elements. Calculate.
(a). The volume of `O_2` required for complete combustion
(b). The molecular formula of A.

Text Solution

Verified by Experts

`C_xH_yN_z+(x+(y)/(4))O_2rarrxCO_2+(y)/(2)H_2O+(z)/(2)N_2`
`a [(x+(y)/(4))s] xa [(y)/(2)xxa](z)/(2)xxaml`
According to question:
`{:(ax=40ml),(a(y)/(2)=70ml),(a(z)/(2)=10ml)]{:(becausex:(y)/(2):(z)/(2)-=4:7:1),or (2x:6,z=8:14:2),because2x=8:}}`
`{:(ax=40ml),(axx2=40ml),(a=20ml):}]{:(x=4),(becausex:y:z=4:14:2or2:7:1):}`
Formula `=C_2H_7Nbecausex=2`
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