Industrially, vanadium metal, which is used in steel alloys, can be obtained by reacting vanadium (V) oxide with calcium at high temperatures:
5 Ca + V2O5 --> 5 CaO + 2 V
In one process, 1.540x10^3 g of V2O5 react with 2.100x10^3 g Ca
(a) Calculate the theoretical yield of V.
(b) Calculate the percent yield if 797.0 g of V are obtained.