SOLVED

8.2  Algorithmic Questions 1) Aluminum metal reacts with aqueous iron(III) oxide to form aqueous aluminum oxide and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients? A) 1 B) 2 C) 3 D) 4 2) Strontium phosphate reacts with sulfuric acid to form strontium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-numbered coefficients? A) 1 B) 2 C) 3 D) none of these 3) According to the following balanced reaction, how many moles of NO are formed from 8.44 moles of NO2 if there is plenty of water present? 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) A) 25.32 moles NO B) 12.66 moles NO C) 8.44 moles NO D) 5.63 moles NO E) 2.82 moles NO 4) Consider the following reaction. How many moles of oxygen are required to produce 4.00 moles of water? Assume that there is excess C3H7SH present. C3H7SH(l) + 6 O2(g) → 3 CO2(g) + SO2(g) + 4 H2O(g) A) 2.67 moles O2 B) 6.00 moles O2 C) 4.00 moles O2 D) 16.0 moles O2 E) 1.00 moles O2 5) According to the following balanced reaction, how many moles of KO are required to exactly react with 4.33 moles of H2O? 4 KO(s) + 2 H2O(l) → 4 KOH(s) + O2(g) A) 4.33 moles H2O B) 8.66 moles H2O C) 17.3 moles H2O D) 2.17 moles H2O E) 1.08 moles H2O 6) How many grams of oxygen are formed when 5.30 moles of KOH are formed? 4 KO(s) + 2 H2O(l) → 4 KOH(s) + O2(g) A) 5.30 g O2 B) 21.2 g O2 C) 42.4 g O2 D) 170 g O2 E) 84.8 g O2 7) How many molecules of HCl are formed when 90.0 g of water reacts according to the following balanced reaction? Assume excess ICl3. 2 ICl3 + 3 H2O → ICl + HIO3 + 5 HCl A) 5.00 × 1024 molecules HCl B) 3.00 × 1024 molecules HCl C) 9.00 × 1024 molecules HCl D) 6.00 × 1024 molecules HCl E) 5.00 × 1025 molecules HCl 8) Carbonic acid can form water and carbon dioxide upon heating. How much carbon dioxide is formed from 12.4 g of carbonic acid? H2CO3 → H2O + CO2 A) 8.80 g B) 17.5 g C) 12.4 g D) 3.60 g E) 42.7 g 9) Lithium and nitrogen react to produce lithium nitride: 6Li(s) + (g) → N(s) How many moles of are needed to react with 0.450 mol of lithium? A) 2.70 B) 0.450 C) 0.150 D) 1.35 E) 0.0750 10) Lithium and nitrogen react to produce lithium nitride: 6Li(s) + (g) → N(s) How many moles of lithium nitride are produced when 0.550 mol of lithium react in this fashion? A) 0.183 B) 1.10 C) 0.0917 D) 1.65 E) 0.275