Suppose a second order chemical process has a rate constant of 0.143 L mol⁻¹ s⁻¹ and follows the reaction mechanism shown below:

A + B
→
C wherein rate = k[A][B].
If 0.47 moles of A are reacted with excess B, how long will it take, in seconds, for 0.30 moles of A to react?
Enter only a number; do not enter units. Assume two significant figures.