222 -- Referring to the graph below, which shows the logarithmic changes of molar concentration of reactant A in a reaction at a certain temperature, if the stoichiometric coefficient of A in the reaction equation is 2, and the ratio of the initial rate of reaction at 20 seconds to the average rate of consumption of A in the time interval 13 to 20 seconds is which of the following?
[Figure: Graph of $\log[\mathrm{A}]$ vs. $t$(s) showing a straight line decreasing from approximately 0.9 at $t=0$ to about 0.1 at $t=20$, with gridlines at $t = 5, 10, 15, 20$.]
(1) $0.374$ (2) $0.437$ (3) $0.785$ (4) $0.875$
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\textbf{222 --} Referring to the graph below, which shows the logarithmic changes of molar concentration of reactant A in a reaction at a certain temperature, if the stoichiometric coefficient of A in the reaction equation is 2, and the ratio of the initial rate of reaction at 20 seconds to the average rate of consumption of A in the time interval 13 to 20 seconds is which of the following?
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\textit{[Figure: Graph of $\log[\mathrm{A}]$ vs. $t$(s) showing a straight line decreasing from approximately 0.9 at $t=0$ to about 0.1 at $t=20$, with gridlines at $t = 5, 10, 15, 20$.]}
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(1) $0.374$ \qquad (2) $0.437$ \qquad (3) $0.785$ \qquad (4) $0.875$
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