I'm doing revision questions and want to double check something. The opening information reads:
Two chlorides of iron were prepared. One was prepared by reacting iron with dry chlorine gas. 4.50 g of iron reacted with chlorine gas to produce 13.01 g of the chloride. The other chloride was prepared by reacting iron with dry hydrogen chloride; 2.80 g of iron reacted with hydrogen chloride to produce 6.35 g of the chloride.
The questions are then:
(i) Calculate the mass of iron that reacted with 2.80 g of iron in each chloride.
(ii) Find the ratio of the different masses of chlorine that combined with 2.80 g of iron.
(iii) Which of the chemical combination laws is demonstrated using this data?
Is that first question right? I would've thought they're asking to calculate the mass of chlorine, which you'd simply get by subtracting the mass of reactant iron from the mass of the end product.