At a certain fixed temperature, the reaction below:
A(g) + 2B(g) → AB2(g)
is found be first order i the concentration of A and zeroth order i the concentration of B. The reaction rate constant is 0.05s^-1. If 2.00 moles of A and 4.00 moles of B are placed in a 1.00 liter container, how many seconds will elapse before the concentration of A has fallen to 0.30 mole.liter?
a) 10.22 sec b) There is not enough information to answer. c) 2.83 sec d) 37.94 sec