75. Iron reacts with oxygen. Different masses of iron are burned in a constant amount of oxygen. The product, an oxide of iron, is weighed. The graph below is obtained when the mass of product obtained is plotted against the mass of iron used. (a) How many grams of product are obtained when 0.50 g of iron are used? (b) What is the limiting reactant when 2.00 g of iron are used? (c) What is the limiting reactant when 5.00 g of iron are used? (d) How many grams of iron react exactly with the amount of oxygen supplied? (e) What is the simplest formula of the product?
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