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How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O at STP? 4HCl(g) + O(g) 2Cl(g) + 2H2O(g) a. b. 0.98 L 0.49 L c. d. 3.9 L 2.0 L Which coefficients correctly balance the formula ? NH4NO2 N2 + H20 a. 1,2,2 b. 1,1,2 c. 2,1,1 d. 2,2,2 After calculating the amount of reactant B required to completely react with A, then comparing that amount with the amount of B available, one can determine the a. limiting reactant. b. rate of the reaction. c. energy released in the reaction. d. pathway of the reaction. For the reaction represented by the equation CH4 + 2O2 CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100. g of methane? a. 6.23 mol c. 12.5 mol b. 10.8 mol d. 25 mol How many grams of H3PO4 are produced when 10.0 moles of water react with an excess of P4O10? P4O10 + 6H2O 4H3PO4 a. b. 1.22 g 6.7 g c. d. 147 g 653 g For the reaction represented by the equation Mg + 2HCl H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium chloride. a. 71.8% c. 81.6% b. 74.3% d. 84.2% The Haber process for producing ammonia commercially is represented by the equation N2(g) + 3H2(g) 2NH3(g). To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required? a. 1.0 mol c. 3.0 mol b. 2.0 mol d. 6.0 mol What is the maximum possible amount of product obtained in a chemical reaction? a. theoretical yield c. mole ratio b. percentage yield d. actual yield For the reaction represented by the equation CH4 + 2O2 2H2O + CO2, calculate the percentage yield of carbon dioxide if 1000. g of methane react with excess oxygen to produce 2300. g of carbon dioxide. a. b. 83.88% 89.14% c. d. 92.76% 96.78% In the reaction represented by the equation 2Al2O3 4Al + 3O2, what is the mole ratio of aluminum to oxygen? a. b. 10:6 3:4 c. d. 2:3 4:3 The coefficients in a chemical equation represent the: a.masses, in grams, of all reactants and products. b.relative numbers of moles of reactants and products. c.number of atoms in each compound in a reaction. d.number of valence electrons involved in the reaction. A balanced chemical equation allows one to determine the a. b. c. d. mole ratio of any two substances in the reaction. energy released in the reaction. electron configuration of all elements in the reaction. mechanism involved in the reaction. To balance a chemical equation, it may be necessary to adjust the a.coefficients. b.subscripts. c.formulas of the products. d.number of products. A chemical equation is balanced when the a. coefficients of the reactants equal the coefficients of the products. b. same number of each kind of atom appears in the reactants and in the products. c. products and reactants are the same chemicals. d. subscripts of the reactants equal the subscripts of the products. In what kind of reaction do two or more substances combine to form a new compound? a.decomposition reaction b.combustion reaction c.double-displacement reaction d.synthesis reaction