B calculate the half lives when nobr 0072 m and nobr

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b.Calculate the half-lives when [NOBr]
.
9.Define activation energy. What role does activation energy play in chemical kinetics?
10.Given the same reactant concentrations, the reaction CO(g) + Cl2(g) → COCl2(g) at 250°C is 1.50 × 103times as fast as the same reaction at 150°C. Calculate the activation energy for this reaction. Assume that the frequency factor is constant.
11.Most reactions, including enzyme-catalyzed reactions, proceed faster at higher temperatures. However, for a given enzyme, the rate drops off abruptly at a certain temperature. Account for this behavior.
12.The bromination of acetone is acid-catalyzed:CH3COCH3+ Br2CH3COCH2Br+ H++ BrThe rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H+ions at a certain temperature: [CH3COCH3][Br2][H+]Rate of Disappearance of Br2(M/s)(1)0.300.0500.0505.7 × 10–5(2)0.300.100.0505.7 × 10–5(3)0.300.0500.101.2 × 10–4(4)0.400.0500.203.1 × 10–4(5)0.400.0500.0507.6 × 10–5a.What is the rate law for the reaction?

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