Question

What volume of oxygen at s.T.P will be obtained by the action of heat on 20g. Of kclo3?

Answer 1

2kclo3=2kcl+3o2.....on heating 2 moles of kclo3, moles of oxygen obtained=3.....

molecular weight of o2=32gms, molecular weight of kclo3=40+35.5+48=123.5gms........molar volume of o2 at stp =22.4L....from(2×123.5) gms of kclo3, volume of o2 obtained=(3×22.4) L,from 20gm of kclo3, volume of o2 obtained=3×22.4×20÷(2×123.5) litres.........hope this helps u.u can ask me,if u have any doubt.