Answer to Question #312329 in General Chemistry for Ivan Ackerman

Question

Phosphorus reacts with oxygen to form diphosphorus pentoxide, P2O5 .

4P(s)+5O2(g)⟶2P2O5(s)

How many grams of P2O5 are formed when 2.17 g of phosphorus reacts with excess oxygen? Show the unit analysis used for the calculation by placing the correct components into the unit-factor slots.

Answer 1

Moles of phosphorus are

Moles= 2.17/31= 0.07moles

Moles P2O5 are

(1/3)× 0.07 = 0.023moles

Mass= 284× 0.023

Mass= 6.532g