Answer:
The answer to your question is  131 g of CO₂
Explanation:
Data
mass of COâ‚‚ = ?
mass of Câ‚‚Hâ‚‚ = 38.9 g
Balanced chemical reaction
        2C₂H₂  +  5O₂  ⇒  4CO₂  +  2H₂O
Process
1.- Calculate the molar mass of Câ‚‚Hâ‚‚ and COâ‚‚
molar mass Câ‚‚Hâ‚‚ = (12 x 2) + (1 x 2) = 24 + 2 = 26 g
molar mass COâ‚‚ = (12 x 1) + (16 x 2) = 12 + 32 = 44 g
2.- Use proportions to solve this problem.
          2(26) g of C₂H₂ -------------------- 4(44) g of CO₂
          38.9 g of C₂H₂ --------------------  x
                 x = (38.9 x 4(44)) / 2(26)
                 x = 6846.4 / 52
                 x = 131.6 g of CO₂
