Stoichiometry Worksheet #1 A balanced equation reveals mole ratios, which can be converted, as needed, into information in grams (or L or particles or kJ…), and used to solve stoichiometry problems. Solve the following. Remember to write a balanced equation as part of your work, if it is not already provided . 1. In the equation 2 KClO3 2 KCl + 3 O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decompose completely? (A: 4.5 mol O2) Answer: _____________ 2. The Haber process for the production of ammonia is represented by the unbalanced equation N2(g) + H2(g) 2 NH3(g). The complete conversion of 9.0 mol of hydrogen to ammonia would require how many moles of N2? (A: 3.0 mol N2) Balanced Equation: Answer: ____________ 3. How many moles of hydrogen gas are needed to react with 15.1 g of chlorine gas to produce hydrogen chloride gas? (A: 0.213 mol H2) Balanced Equation: Answer: _____________ 4. How many moles of calcium oxide are produced when 36.5 g of calcium react completely with oxygen gas? (0.911 mol CaO) Balanced Equation: Answer: _____________ 5. How many grams of oxygen gas are needed to react completely with 16.2 g of hydrogen gas, to produce water? (A: 128 g O2) Balanced Equation: Answer: _____________ 6. How many grams of aluminum are required to produce 415 g of aluminum oxide, through reaction with oxygen gas? (A: 220. g Al) Balanced Equation: Answer: _____________ 7. How many grams of solid iodine are produced by the decomposition of 25.4 g of hydrogen iodide gas? (A: 25.2 g I2) Balanced Equation: Answer: _____________ 8. How many atoms of aluminum will react completely with 1.33 x 1024 atoms of sulfur to produce aluminum sulfide? (A: 8.87 x 1023 Al atoms) Balanced Equation: Answer: _____________ 9. What volume, at STP, of fluorine gas could be produced by the decomposition of 9.22 x 1024 molecules of POF3? (A: 515 L F2) Balanced Equation: 4 POF3(g) P4(s) + 2 O2(g) + 6 F2(g) Answer: _____________ 10. For the single replacement reaction between zinc and hydrochloric acid, what volume of hydrogen gas (H2) at STP will be produced if 132 g of Zn reacts completely with an excess of hydrochloric acid? (A: 45.2 L H2) Balanced Equation: Answer: _____________ 11. For the reaction between hydrogen and bromine which produces hydrogen bromide, how many grams of hydrogen bromide (HBr) will be formed if 5.6 L of hydrogen gas (H2) reacts completely with bromine (Br2)? (A: 40. g HBr) Balanced Equation: Answer: _____________