Exam Bank for Stoichiometry- Questions and Answers Latest Update 2025 (Already Passed)

Exam Bank for Stoichiometry- Questions and Answers Latest Update 2025 (Already Passed) If 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bags of brownie mix do you need if you want to use up all 3 eggs and 1 cup of oil? - Answers 3 What is conserved in the reaction shown below? H2(g)+Cl2(g)- 2HCl(2) - Answers mass, moles, molecules, and volume In a chemical reaction, the mass of the products - Answers is equal to the mass of the reactants In any chemical reaction, the quantities that are preserved are - Answers mass and the number of ions The first step in the most stoichiometry problems is to - Answers convert given quantities to the moles In the reation 2CO(g)+O2 (g)- 2CO2(g) what is the ratio of moles of oxygen used to moles of CO2 - Answers 1:2 Which of the following is true about the total number of reactants and the total number of products in the reaction shown below. C5H12(l) + 8O2(g)- 5CO2(g)+6H2O(g) - Answers 9 moles of reactants chemically changed to 11 moles of the product which of the following is an INCORRECT interpretation of the balanced equation shown below? 2S(s)+3O2(g)- 2SO3(g) - Answers 2g S+ 3g O2 - 2g SO3 How many moles of aluminum are needed to react completely with 1.2 mol of FeO? 2Al(s) + 3FeO(s) - 3Fe (s) + Al2O3 (s) - Answers 0.8 mol How many moles of glucose C6H12O6 can be burned biologically when 10.0 mol of oxygen is avaliable? C6H12O6 (s) + 6O2 - 6O2 (g) +Al2O3 (s) - Answers 1.67 mol Hydrogen gas can be produced by reacting aluminum with Sulfuric acid. How many moles of sulfuric acid are needed to completely react with 15.0 mol of aluminum? 2Al (s) + 3H2SO4 (aq)-Al2 (SO4)3 (aq) + 3H2 (g) - Answers 22.5 mol when iron rust in air, iron(111) oxide is produced. How many moles of oxygen react with 2.4 mol of iron in the rusting reaction? 4Fe (s) + 3O2 (g) - 2Fe2O3 (s) - Answers 1.8 mol At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form water? 2H2 (g) +O2 (g) - 2H3PO4 (aq) - Answers 1.8 L When glucose is consumed, it reacts with oxygen in the body to produce carbon dioxide , water and energy. How many grams of carbon dioxide would be produced if 45 g of C6H12O6 completely reacted with oxygen? - Answers 66 g how many grams of H3PO4, are produced when 10.0 moles of water react with an excess of P2O10? P4O10 (s) + 6H2O (l) - 4H3PO (aq) - Answers 653 g How many liters of hydrogen gas are needed to react with CS2 to produce 2.50 L of CH4 at STP? 4H2 +CS2 - CH4 + 2H2S - Answers 10.0 L Which conversion factor do you use first to calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with O2? the equation for the complete combustion of methane is: CH4 + 2O2 - CO2 + 2H2O - Answers 1 mol CH4/ 16.0 g CH4 How many liters of NH3 are needed to completely react with 30.0 L of NO (at STP) 4NH3 + 6NO - 5N2 + 6 H2 O - Answers 20.0 L