Which sample has the greatest mass?

A.     1 mol of \({\text{S}}{{\text{O}}_{\text{2}}}\)

B.     2 mol of \({{\text{N}}_{\text{2}}}{\text{O}}\)

C.     2 mol of Ar

D.     4 mol of \({\text{N}}{{\text{H}}_{\text{3}}}\)

B