If 25.0 milliliters of 0.200 M BrO3 −is mixed with 30.0 milliliters of 0.450 M Br −solution that contains a large excess of H + , the amount of Br2 formed, according to the equation above, is: (hint: this is a limiting reactant problem) Balanced equation :BrO3 −+ 5Br −+ 6H +⇄ 3Br2 + 3H2O

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.