Answer to Question #208231 in General Chemistry for momd

Question

Combustion reactions are a notable source of carbon dioxide in the environment. Using the following balanced equation, how many grams of carbon dioxide are formed when 100.00 g of propane (C3H8) is burned? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer.

C₃H₈ +5O₂ = 3CO₂+4H₂O

Answer 1

C₃H₈ +5O₂ = 3CO₂+4H₂O

According to the equation, n (CO₂) = 3 x n (C₃H₈)

n = m / M

M (C₃H₈) = 44.1 g/mol

M (CO₂) = 44.01 g/mol

n (C₃H₈) = 100.00 / 44.1 = 2.3 mol

n (CO₂) = 3 x n (C₃H₈) = 3 x 2.3 = 6.9 mol

m (CO₂) = 6.9 x 44.0 = 303.7 g