Question

Calculat volume of O2 at STP required for complete combustion of 2.64L of acetylene at STP. 2C2H2 + 5O2 = 4CO2 + 2H2O

Answer 1

no. Of moles of C2H2=2.64/22.4

=0.1

We know,

no. Of moles of acetylene÷ stoichiometry of acetylene=no. Of moles of O2(n)÷ stoichiometry of O2

0.1/2=n/5

n=(5*0.1)/2

=0.25

Volume of 02 required for combustion= 0.25*22.4

= 5.6l