Question

2H2+O2-----2H2O if 80cm3 of hydrogen was reacted with 25cm3 of oxygen, calculate the volume of residual gases.

Answer 1

Answer:

now 1 vol of O2 reacts with 2 vol of H2

25 cc of O2 would react 2*25 cc of H2

25 cc of O2 reacts with 50 cc of H2

unreacted H2= 80 cc - 50 cc

30 cc

the volume of the resultant gas is 50 cc of h2o and 30 cc unreacted H2