Question

2c₂h₂(g) + 5o₂(g) → 4co₂(g) + 2h₂o(g)
how many liters of c₂h₂ will react with 12.0 mol o₂ assuming the reaction is at stp?
? l c₂h₂

Explanation:

Step1: Find mole ratio of C₂H₂ to O₂

From reaction: 2 mol C₂H₂ reacts with 5 mol O₂ → ratio = 2/5

Step2: Calculate moles of C₂H₂

Moles of C₂H₂ = 12.0 mol O₂ × (2/5) = 4.8 mol

Step3: Convert moles to liters at STP

1 mol gas = 22.4 L at STP → Volume = 4.8 mol × 22.4 L/mol = 107.52 L

Answer:

107.52