You make a solution that has 30 molecules of sugar, 5 molecules of salt and 65 molecules of water.
a. What is the sugar concentration (in %)? B. What is the total solute concentration (in %)? C. What is the water/solvent concentration (in %)?

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.