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The reaction of 0.55 M BrCH2CH3 with 0.65 M NaCN occurs at an average rate of...

The reaction of 0.55 M BrCH2CH3 with 0.65 M NaCN occurs at an average rate of 6.8 x 10-3 M/s at 298 K according to the equation below. Determine the concentration (in M) of BrCH2CH3 after 15 seconds.

????2??3+????→????2??3+????

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