The reaction A + B C is found to have the rate law: rate = k [A]2. When the concentration of A is 0.200 M and the concentration of B is 0.400 M, the...

The reaction A + B → C is found to have the rate law: rate = k[A]2. When the concentration of A is 0.200 M and the concentration of B is 0.400 M, the reaction rate is 0.00700 M/s. What is the numerical value of k for this reaction (with appropriate units where time is in seconds and concentration is in M, as needed).

0.875

0.175

2.8 x 10-4

5.6 x 10-4

0.57