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 NO₂ is 5.5 × 10^{- 4} M/s, the rate of decomposition of ^N2^O5 is
M/s)

A) 10.1 × 10^{- 4}
B) 5.5 × 10^{- 4}
C) 2.8 × 10^{- 4}
D) 2.2 × 10^{- 3}
E) 1.4 × 10^{- 4}