The Decomposition of N₂O(g) to Nitrogen and Oxygen Has the Rate

The decomposition of N₂O(g) to nitrogen and oxygen has the rate law where k = 1.1 × 10^-3 M^-1 s^-1 at 565 ^$\circ$ C. If the initial concentration of a sample of N₂O is 0.50 M, what is the concentration after one hour at 565 ^$\circ$ C?

A) 9.5 × 10^-3 M
B) 2.2 × 10^-3 M
C) 0.029 M
D) 0.17 M
E) 0.46 M