At Elevated Temperatures, Dinitrogen Pentoxide Decomposes to Nitrogen Dioxide and Oxygen

At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N₂O₅(g) → 4NO₂ (g) + O₂ (g)
When the rate of formation of O₂ is 2.2 × 10^-4 M/s, the rate of decomposition of N₂O₅ is __________ M/s.

A) 1.1 × 10^-4
B) 2.2 × 10^-4
C) 2.8 × 10^-4
D) 4.4 × 10^-4
E) 5.5 × 10^-4