Given total pressure (P)=10 atm
Given,
total number of moles; nN2+nO2+nCO2=10
The gas O2 is absorbed by pyrogallol. Hence the loss of pressure is due to O2.
10−nO2nN2+nO2+nCO2×10=9 atm
Hence the number of moles of O2 is 1.
PN2=3 atm, PO2=1 atm, nN2=3, nO2=1
∵PN2=xN2×P(total)=nN2nN2+nO2+nCO2×10
=nN210×10⇒nN2=3
∴ nCO2=10−(nN2+nO2)=10−4=6
Weight of C=6×44=264 g