J.R. S. answered 05/07/21
Ph.D. University Professor with 10+ years Tutoring Experience
You answer is incorrect.
Write a correctly balanced equation for the reaction:
P4 + 5O2 ==> 2P2O5 ... balanced equation
Using dimensional analysis and the stoichiometry of the balanced equation we have...
3.25 mols P4 x 2 mos P2O5 / mol P4 = 6.50 mols P2O5 (Answer B)