Question

1.      Assume that in the decomposition of KCIO₃ the volume of oxygen gas produced at STP in cm³ is 100 times its molar mass. Calculate the mass of KCI formed in this reaction 

Answer 1

2KCIO₃ = 2KCl + 3O₂, n(O2)/3=n(KCl)/2=) n(KClO3)=n(O2)*1.5 =0.32*1.5/22.4 = 0.0214, m(KCl)=1.6 grams