What Is the Internal Energy of 45 Moles of Neon

Multiple Choice

What is the internal energy of 45 moles of Neon gas (molecular mass = 20 u) at 24°C? (R = 8.31 J/mol⋅K)

A) 1.7 × 10⁵ J
B) 7.4 × 10⁵ J
C) 1.9 × 10³ J
D) ​1.3 × 10⁴ J
E) ​It depends on the container size,which is not given.