A reaction is made up in the following way:
12 mL of 4.7 M acetone
+ 12 mL of 1.3 M HCl
+ 18 mL of 0.0051 M I2
+ 19 mL of water.
It takes 386 seconds for the I2 color to disappear from the reaction mixture. What was the rate of reaction?
Express your answer as a decimal number (no exponents). Include proper (abbreviated) units.