For the reaction of BF3 (g) + NH3 (g) -----> F3BNH3 (g) the second order rate constant k at 100 C is 3.41 M^-1 s^-1.

(10 points) For the reaction of BF; (g) + NH, (g) => FZBNH, (8) the second-order rate constant k at 100 C is 3.41 M's!. Assuming the initial concentrations of both reactants are equal, how long would it take for the molar concentration of BF, to drop from 0.250 M to 0.0100 M