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In a reaction, 2A ® Products, the concentration of A decreases from 0.5 mol L^-1 to 0.4 mol L^-1 in 10 minutes. Calculate the rate during this interval?

4.2  In a reaction,2A\rightarrow Products P, the concentration of A decreases from 0.5 mol L^{-1} to 0.4 mol L^{-1} in 10 minutes. Calculate the rate during this interval?

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M manish

According to the formula of an average rate

                                                                   = -\frac{1}{2}\frac{\Delta[ A]}{\Delta t}            (final concentration - initial conc.)/time interval

                                                                  =-\frac{1}{2}\frac{[ A]_{2}-[A]_{1}}{t_{2}-t_{1}}

                                                                   =-\frac{1}{2}\frac{[ 0.4]-[0.5]}{10}

                                                                   =\frac{0.1}{20}Mmin^{-1}

                                                                    = 5\times 10^{-3}Mmin^{-1} 

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