Flashcards › Stoichiometry

For the reaction CH4 + 2O2 yields CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100g of methane? 6.23 mols For the reaction 2H2 + O2 yields 2H2 + 2H2O, how many grams of water are produced from 6.00 mols of hydrogen? 108g For the reaction 2Na + 2H2O yields 2NaOH + H2, how many grams of sodium hydroxide are produced from 3.0 mols of water? 120g For the reaction SO3 + H2O yields H2SO4, how many grams of sulfur trioxide are required to produce 4.00 mols of sulfuric acid? 160g For the reaction 2Fe + O2 yields 2FeO, how many grams of iron oxide are produced from 8.00 mols of iron? 574g For the reaction 2Na + Cl2 yields 2NaCl, how many grams of chlorine gas are required to react completely with 2.00 mols of sodium? 70.9g For the reaction 2HNO3 + Mg(NO3) yields Mg(NO3)2 + 2H2O, how many grams of magnesium nitrate are produced from 8.00 mols of nitric acid, HNO3? 592g For the reaction HCl +NaOH yields NaCl H2O, how many mols of hydrochloric acid are required to produce 15.0g of water? 8.32 mols For the reaction Pb(NO3)2 + 2KI yields PbI2 + 2KNO3, how many mols of lead iodide are produced from 300g of potassium iodide? 0.903 mols For the reaction Cl2 +2KBr yields 2KCl + Br2, how many moles of potassium chloride are produced from 119g of potassium bromide? 1.00 mols For the reaction 3Fe + 4H2O yields Fe3O4 + 4H2, how many moles of iron oxide are produced from 500g of iron? 3 mols For the reaction 2KIO3 yields 2KCl + 3O2, how many moles of potassium chlorate are required to produce 250g of oxygen? 5.2 mols For the reaction Cl2 + 2KBr yields 2KCl + Br2, how many grams of potassium chloride can be produced from 300 g each of chlorine and potassium bromide? 188g For the reaction 2Na + 2H2O yields 2NaOH + H2, how many grams of hydogen are produced if 120g of sodium and 80g of water are available? 4.5g For the reaction 2Na + Cl2 yields 2NaCl, how many grams of sodium chloride can be produced from 500g each of sodium and chlorine? 825g For the reaction SO3 +H2O yields H2SO4, how many grams of sulfuric acid can be produced from 200g of sulfur trioxide and 100g of water? 245g For the reaction 2Zn + O2 yields 2ZnO, how many gram of zinc oxide can be produced from 100g each of zinc and oxygen? 214g What branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions? stoichiometry. What is the study of the mass relationships of elements in compounds? compostion stoichiometry. What is the study of the mass relationships among reactants and products in a chemical reaction? reaction stoichiometry. A determination of the masses and number of mols of sulfur and oxygen in the compound sulfur dioxide would be studied in compostion stoichiometry. A balanced chemical equation allows one to determine the mole ration of any two substances in the reaction. The coefficients in a chemical equation represent the relative numbers of moles of reactants and products. Each of the four types of reaction stoichiometry problems requires using a mole ratio.` If one knows the mole ratio of a reactant and product in a chemical reaction, one can calculate the mass of the products from a known mass of reactant. If one knows the mass and molar mass of reactant A and the molar mass of product D in a chemical reaction, one can determine the mass of product D produced by using the mole ratio of D to A from the chemical equation. In the chemical reaction wA + xB yields yC + zD, a compostion of the number of moles of A to the number of moles of C would be a(n) mole ratio. In the chemical equation wA + xB yields yC + zD, if one knows the mass of A and the molar masses of A, B, C, and D, one can determine the mass of any of the reactants or products. In the reacton N2+ 3H2-->2NH3, what is the mole ration of nitrogen to ammonia? 1:2 In the reaction 2Al2O3--> 4 Al +3O2, what is the mole ratio of aluminum to oxygen? 4:3 In the reaction 2H2 + O2-->2H2O, what is the mole ratio of oxygen to water? 1:2 In the reaction Ca + Cl2--> CaCl2, what is the mole ratio of chlorine to calcium chloride? 1:1 In the reaction Zn + H2SO4 + H2, what is the mole ratio of zince to sulfuric acid? 1:1 C+2H2-->CH4, what is the mole ratio of hydrogen to methane? 2:1 In the reaction N2+3H2-->2NH3, what is the mole ratio of hydrogen to ammonia? 3:2 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? 3.0 mol In the equation 2KClO3-->2KCl+3O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decompose completely? 4.5 mol For the reaction C+2H2-->CH4, how many moles of hydrogen are required to produce 10 mol of methane,CH4? 20 mol For the reaction 2H2+O2-->2H2O, how many moles of water can be produced from 6.0 mol of oxygen? 12 mol For the reaction N2+3H2-->2NH3, how many moles of nitrogen are required to produce 18 mol of ammonia? 9.0 mol For the reaction AgNO3+NaCl-->NaNO3+AgCl, how many moles of silver chloride, AgCl, are produced from 7 mol of silver nitrate AgNO3? 7.0 mol Covers Mole Ratios and general stoichiometry

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