Question

how many moles of o2 are needed to react completely with 35.0 mol c2h2?

Answer 1

2C₂H₂ + 5O₂ ⇒ 4CO₂ + 2H₂O
2mol    :  5mol
35mol  :  x

x = 35mol*5mol / 2mol = 87,5mol

Answer 2

Answer:

87.5

Explanation:

got it right on edg :)