How Much Energy (In KJ)is Required to Ionize 1

How much energy (in kJ) is required to ionize 1.97 moles of hydrogen atoms?

A) 1.29 × 10³ kJ
B) 1.19 × 10³ kJ
C) 4.29 × 10³ kJ
D) 2.59 × 10³ kJ
E) 5.89 × 10³ kJ