Question

The acetylene tank contains 35.0 mol C2H2, and the oxygen tank contains 84.0 mol O2. How many moles of O2 are needed to react completely with 35.0 mol C2H2? ___mol O2

Answer 1

 The moles   of O2 that are needed to react  completely  with 35.0  mol C2H2 is 87.5 moles  of O2

 Explanation

Write a balanced chemical  equation  for reaction of between C2H2 and O2

2 C2H2 + 5O2 →  4 CO2   + 2 H2O

if 35.0 moles C2H2  reacted then  use  the o mole ratio  to determine  the moles  of C2H2

The mole ratio  of C2H2 :O2 = 2:5 therefore the   moles of O2

=  35 moles x5/2  =  87.5 moles of O2

Answer 2

Answer:

87.5

Explanation: