16 gm of oxygen and 3 gm of hydrogen are mixed and kept in 760 mm presusre at 0oC. The total volume occupied by the mixture will be nearly

2 2 1 3 2 2 mol O mol H 2 Total n 2 0.08206 273.15 44.829 1 nRT V lit P x x . As we know, 1litre =1000 ml 44.829 litre = 44829 44800 ml