Answer:
14.2g
Explanation:
The reaction expression is given as:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Given mass of propane combusted;
4.74g
Unknown:
Mass of carbon dioxide produced = ?
Solution:
To solve this problem, we find the number of moles of the given propane;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of C₃H₈ = 3(12) + 8(1) = 44g/mol
Number of moles = [tex]\frac{4.74}{44}[/tex] = 0.11mol
From the balanced reaction equation:
1 mole of C₃H₈ will produce 3 moles of CO₂
0.11mole of C₃H₈ will produce 3 x 0.11 = 0.33mole of CO₂
Mass of CO₂ = number of moles x molar mass
Molar mass of CO₂ = 12 + 2(16) = 44g/mol
Mass of CO₂ = 0.33 x 44 = 14.2g
