"If 1.95 g of Mg(s) are mixed with 105 mL of 0.12M HCl(aq) at 25°C and P atm = 1.06 atm, what is the volume of hydrogen gas produced in liters if the hydrogen gas is collected over water? Mg(s) + 2 HCl(aq) → MgCl 2(aq) + H 2(g) ΔH rxn = -467 kJ/mol "

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.