Answer to Question #141112 in General Chemistry for Jane Balgos

Question

B. Interpreting chemical equations using a balanced chemical equations: Solve for the required value:

1. How many moles of CO2 can be produced from 7.75 mole C2H5OH (Balance the equation first.) C2H5OH + O2______ CO2 + H2O

2. Ethane gas, C2H6, burns in air to form carbon dioxide and water. C2H6 + O2 ______ CO2 + H2O a. How many moles of O2 are needed for the complete combustion of 15.0 mole of ethane? b. How many grams of CO2 are produced for each 8.0 g H2O produced?

Answer 1

C₂H₅OH + 3O₂ = 2CO₂ + 3H₂O

n (CO₂) = 7,75 * 2/1 = 15,5 mol

Anser: 15,5 mol

2C₂H₆+ 7O₂= 4CO₂ + 6H₂O

n (O₂) = 15 * 7/2 = 52,5 mol

Anser:52,5 mol

n (CO₂) = 30 mol

m(CO₂) =$n*M=$ 1320 g

n (H₂O) = 45 mol

m (H₂O) = 810 g

810 g H₂O – 1320 g CO₂

8 g - X

Х = 8 * 1320/810 = 13 g CO₂

Anser: 13 g