# Poetry Essay

4673 Words19 Pages
Stoichiometry Practice 1. Calculate the mass of silver bromide produced from 22.5 g of silver nitrate in the following reaction: 2AgNO3(aq) + MgBr2(aq) ( 2AgBr(s) + Mg(NO3)2(aq) ans: 24.9 g AgBr 2. What mass of acetylene, C2H2, will be produced from the reaction of 90. g of calcium carbide, CaC2, with water in the following reaction? CaC2(s) + 2H2O(l) ( C2H2(g) + Ca(OH)2(s) ans: 37 g C2H2 3. Chlorine gas can be produced in the laboratory by adding concentrated hydrochloric acid to manganese(IV) oxide in the following reaction: MnO2(s) + 4HCl(aq) ( MnCl2(aq) + 2H2O(l) + Cl2(g) a. Calculate the mass of MnO2 needed to produce 25.0 g Of Cl2 ans: 30.7 g MnO2 b. What mass of MnCl2 is produced when 0.091 g of C12 is generated? ans: 0.16 g MnCl2 1. How many moles of ammonium sulfate can be made from the reaction of 30.0 mol of NH3 with H2SO4 according to the following equation: ans. 15 mol (NH4)2 SO4 2NH3 + H2SO4 ( (NH4)2 SO4 2. In a very violent reaction called a thermite reaction, aluminum metal reacts with iron(III) oxide to form iron metal and aluminum oxide according to the following equation: Fe2O3 + 2Al ( 2Fe + A12O3 a. What mass of Al will react with 150 g of Fe2O3? ans. 51 g Al b. If 0.905 mol Al2O3 is produced in the reaction, what mass of Fe is produced? ans. 101 g Fe c. How many moles of Fe2O3 will react with 99.0 g of Al? ans. 1.83 mol Fe2O3 3. The reaction N2(g) + 3H2(g) ( 2NH3(g) is used to produce ammonia commercially. If 1.40 g of N2 are used in the reaction, how many grams of H2 will be needed? ans. 0.303 g H2 4. What mass of sulfuric acid, H2SO4, is required to react with 1.27 g of potassium hydroxide, KOH? The products of this reaction are