Solve this question u. 150 moles C12 x3 moles 02/1 mole KC103 x 122.5 g/l mole KC103
(d) 0.150 moles C] 2 x 3 moles C12/1 mole KCIO± xl mole KC103/122.S g
69. 2.0 g of a sample contains mixture of Si02 and 203. On very strong heating, it leaves a
residue weighing 1.96 g. The reaction responsible for loss of mass is given below.
Fe20g (s) (unbalance equation)
What is the percentage by mass of Si02 in original sample ?
(a) 10%
(C) 400/0