• # question_answer A decomposes as The rate of disappearance of B, taking 4M concentration of A is equal to A) $1.6\times {{10}^{-3}}M{{s}^{-1}}$  B) $6.4\times {{10}^{-3}}M{{s}^{-1}}$ C) $3.2\times {{10}^{-3}}M{{s}^{-1}}$ D) insufficient to calculate

$\frac{1}{2}\frac{d{{C}_{B}}}{dt}={{K}_{1}}{{C}_{A}}$     $\frac{d{{C}_{B}}}{2dt}=2{{K}_{1}}{{C}_{A}}$ $=2\times 4\times {{10}^{-4}}\times 4=32\times {{10}^{-4}}$ $=3.2\times {{10}^{-3}}\text{M}\,{{\text{s}}^{-1}}$ (logical)