This reaction is second order. k = 0.039 M⁻¹. It required 23.0 seconds for the concentration to decrease to 0.300 M. What was the starting concentration? a) 1.48 M b) 9.95 x 10⁻¹ M c) 0.410 M d) 7.296 x 10⁻¹ M e) 297 M f) 3.21 x 10⁻¹ M g) 5.81 x 10⁻¹ M h) 8.52 M
