3.32 How many moles of vanadium atoms, V, are needed combine with 0.565 mol of O atoms to make vanadium pentoxide, V205?

Vanadium is a chemical element with the symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) somewhat stabilizes the free metal against further oxidation.

0.226 mol V

Explanation:

0.565 mol O x (2 mol V/5 mol O) = 0.226 mol V

it should be p1 v1 = p2 v2