Describe the process of making a sandwich as if it were a chemical reaction with reactants and products. Describe how molar ratios of reactants and products relate to the sandwich analogy. If you doubled the amount of bread you had available, how much of the other ingredients would be needed to make your sandwiches?

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.