If a Sealed Box at STP Holds 8

If a sealed box at STP holds 8.0 moles of clean air, how many molecules of nitrogen does it contain?

A) 8.4 × 10²³ oxygen molecules
B) 6.02 × 10²³ oxygen molecules
C) 1.3 × 10²³ oxygen molecules
D) 3.8 × 10²⁴ oxygen molecules
E) 4.8 × 10²⁴ oxygen molecules