What is the half-life for the decomposition of o3 when the concentration of o3 is 2.35*10^-6? the rate constant for this second order reaction is 50.4l

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2