Question

all the oxygen in 0.434g of sample of pure oxide of iron is removed by reduction in the stream of hydrogen .the loss in weight is 0.1210g. what is the formula of the oxide of iron

Answer 1

Answer:

Weight of Iron oxide Weight of oxygen lost as Therefore, the weight of Iron Element            Amount                          %                   mole  Ratio Iron            0.4224 g     77.73 1.39 1 Oxygen            0.1210 g 22.26 1.39 1 Thus, formula is .