20. Решение задачи по химии №002 080

6. A piece of marble is dissolved in 1 liter of 1 N hydrochloric acid. After 5 minutes, the acid concentration became 0.9 mol/L. After 10 minutes - 0.81, after 20 minutes - 0.67 mol / l. What is the rate constant of this heterogeneous process if the marble surface has not changed?

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.