5. The combustion of glucose is represented by the following balanced equation: C6H12O6 +6 026 H₂O + 6 CO2. The reaction uses 1 gram of both C6H12O6 and O₂. What is the percent yield if 0.45 g of H₂O is produced? a. 80% b. 0.558% Oc. 0.31% O d. 100% 2

8. A chemistry student weighed a piece of chalk and found that it had a mass of 56.7 g. After a day of writing with the chalk, the mass decreased 4 point to 48.3 g. How many moles of chalk were used? The chemical formula for chalk is CaC03.* O 0.483 moles O 0,0839 moles O 8.4 moles 841 moles Other: 9.What is the balanced equation for the decomposition of iron(II) hydrogen carbonate? * 3 points 2Fe(HCO)3 (s) ---> Fe2(CO3)3 (s) + H2O (1) + CO2(g) Fe(HCO)3 (s) –> Fe2(C03)3 (s) + H20 (1) + C02(g). 2Fe(HCO)3 (s) --> Fe2(C03)3 (s) + 3 H20 (1) + 3 CO2(g) 2Fe(HCO)3 (s) ---> Fe(C03)3 (s) +3 H20 (1) + 3 CO2(g) Other:

Use the equation below to answer the following question: Fe+Cl2-->FeCl2   A student wants to prove the concept of limiting reactants to his labmates during class. If the student adds 56 g of Fe to 71 g of Cl2, what will the likely result of the reaction be in regards to limiting/excess reactants?

Consider the reaction between 46.0 g of C2H5OH (l) and 32.0 g of O2 (g) producing CO2 and H2O vapor. a. What is the limiting reagent? Explain why briefly.b. How many moles each of ethanol and oxygen react to form the products?c. How many moles of CO2 and H2O are produced?