University:
Dakota State University
Course:
CHEM 114 | General Chemistry II
Academic year:

2019
Views:

388

Pages:

2
Author:

FrextWhestembki

**Stoichiometry** **KEY** **Name:** 1) In the reaction 2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O a) How many oxygen molecules react with 6 molecules of C₂H₆? Answer: 6 molecules C₂H₆ x (7 molecules O₂ / 2 molecules C₂H₆) = 21 molecules O₂ b) How many H₂O molecules are produced when 12 molecules of C₂H₆ react? Answer: 12 molecules C₂H₆ x (6 molecules H₂O / 2 molecules C₂H₆) = 36 molecules H₂O c) How many moles of oxygen molecules are needed to produce 18 moles of CO₂? Answer: 18 mol CO₂ x (7 mol O₂ / 4 mol CO₂) = 31.5 ≈ 32 mol O₂ d) How many moles of CO₂ are produced when 13 moles of C₂H₆ are used up? Answer: 13 mol C₂H₆ x (4 mol CO₂ / 2 mol C₂H₆) = 26 mol CO₂ 2) In the reaction _ Fe + _ H₂O → _ Fe₃O₄ + _ H₂ a) How many molecules of Fe₃O₄ are produced when 12 atoms of Fe react? Answer: 12 atoms Fe x (1 molecule Fe₃O₄ / 3 atoms Fe) = 4 molecules Fe₃O₄ b) How many moles of Fe are required to produce 16 moles of H₂? Answer: 16 mol H₂ x (3 mol Fe / 4 mol H₂) = 12 mol Fe c) How many H₂ molecules are made when 40 molecules of Fe₃O₄ are produced? Answer: 40 molecules Fe₃O₄ x (4 molecules H₂ / 1 molecule Fe₃O₄) = 160 molecules H₂ d) How many moles of H₂O are required to react with 14.5 moles of Fe? Answer: 14.5 mol Fe x (4 mol H₂O / 3 mol Fe) = 19.3 mol H₂O 3. How many moles of H₂O are produced when 9.6 moles of O₂ (g) react according to the equation 2 H₂ (g) + O₂ (g) → 2 H₂O (g) Answer: 9.6 mol O₂ × (2 mol H₂O / 1 mol O₂) = 19.2 mol H₂O = 19 mol H₂O 4. Consider the equation _ I₂ (g) + _ F₂ (g) → _ IF₅ (g) + _ I₄F₂ (g) a) How many moles of IF₅ (g) are produced by 5.40 moles of F₂ (g)? Answer: 5.40 mol F₂ × (2 mol IF₅ / 6 mol F₂) = 0.900 mol IF₅ b) How many moles of F₂ (g) are required to produce 4.50 moles of IF₅? Answer: 4.50 mol IF₅ × (6 mol F₂ / 2 mol IF₅) = 13.5 mol F₂ c) How many moles of I₂ (g) are required to react with 7.60 moles of F₂ (g)? Answer: 7.60 mol F₂ × (1 mol I₂ / 3 mol F₂) = 2.53 mol I₂ 5. A student decomposes some hydrogen peroxide, H₂O₂, according to the following reaction _ H₂O₂ → _ H₂O + _ O₂ If a total of 0.125 moles of reactants and products are involved in the reaction, how many moles of O₂ are produced? Answer: 0.125 mol all × (1 mol O₂ / 3 mol all) = 0.025 mol O₂

How Many Molecules of C2H6O are Required to React with 1.36 Mol Oxygen

Related Documents

Description

Related Documents

Free up your schedule!

Take 5 seconds to unlock