Of the bonds c-n, c=n, and c≡n, the c-n bond is of the bonds c-n, c=n, and cn, the c-n bond is strongest/longest strongest/shortest weakest/shortest intermediate in both strength and length weakest/longest

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.