Question

A. Balance the chemical equation given below, and determine the number of grams of Fe needed to produce 15.0 g of Fe2O3. ________ MgO(s) + ________ Fe(s) → ________ Fe2O3(s) + ________ Mg(s) B. Aluminum metal reacts with aqueous iron(II) chloride to form aqueous aluminum chloride and iron metal. What is the stoichiometric coefficient for iron when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients? C. How many moles of H2O are needed to produce 15.0 g of HCl(aq) in the following reaction? BCl3(g) + 3 H2O(l) → 3 HCl(aq) + B(OH)3(aq) D. When 12.00 g of calcium metal is reacted with water, 12.00 g of calcium hydroxide is produced. Using the following balanced equation, calculate the percent yield for the reaction? Ca(s) + 2 H2O(l) → Ca(OH)2(aq) + H2(g) E. What is the molarity of chloride ions when 10.4 grams of MgCl2 is dissolved in 753 mL of water?