Ethyl chloride, CH3CH2CI used to produce tetraethyllead gasoline additive, decomposes when heated, to give ethylene and hydrogen chloride. CH3CH2CI(g) → C2H4(g) + HCl(g) The reaction is first order. In an experiment, the initial concentration was 0.00100 M. After heating at 500°C for 155 seconds, the concentration of ethyl chloride was reduced to 0.00083 M. What is the concentration of ethyl chloride after a total of 250 seconds? Answer:

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