For a reaction A product, rate constant is 2 10⁻² ~s ⁻¹ . The initial concentration of A is 1.0 ~mol dm ⁻³ . What is the value of 1 [ ~A ]_ t after 100 seconds?

Step-by-step solution

aligned & k =2 10⁻² ~s ⁻¹ (first order reaction) & 2.303 [ A ]₀ [ ~A ]_ t = kt & ([ A ]₀=1 M ) 1 [ ~A ]_ t = k 2.303 t = 2 10⁻² 100 2.303 =0.868 aligned