At elevated temperatures, methylisonitrile (ch3nc) isomerizes to acetonitrile (ch3cn): ch3nc (g) → ch3cn (g) at the start of the experiment, there are 0.200 mol of reactant (ch3nc) and 0 mol of product (ch3cn) in the reaction vessel. after 25 min of reaction, 0.108 mol of reactant (ch3nc) remain. the average rate of decomposition of methyl isonitrile, ch3nc, in this 25 min period is mol/min.

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.