Consider the thermal decomposition of cyclobutane (C4H8(g)) at 438º C, C4H8(g) -> 2C2H4(g). The reaction follows first-order kinetics and the rate constant is k = 2.48 x 10-4 s-1. If the initial concentration of cyclobutane is 0.800 mol/L, what concentration will remain after 10.0 min?