What Is the Internal Energy of 50 Moles of Neon $\degree$

What is the internal energy of 50 moles of Neon gas (molecular mass = 20 u) at 27 $\degree$ C? (R = 8.31 J/mol*K)

A) 1.9 x 10⁵ J
B) 1.6 x 10⁵ J
C) 3.8 x 10³ J
D) It depends on the container size,which is not given.