2. In a reaction, 2A $\to $ Products, the concentration of A decreases from $\text{0}\text{.5 mol }{{\text{L}}^{\text{-1}}}$ to $\text{0}\text{.4 mol }{{\text{L}}^{\text{-1}}}$ in 10 minutes. Calculate the rate during this interval. Ans:The average rate of the...