7.A sample of helium gas occupies a volume of 24.6L at 2.20atm. What would its volume be at 3.50atm?Circle the Correct (28.1Lor15.5L)

For the following, determine the type of reaction and then give products.

Chemistry worksheet - i am not sure what they are asking for exactly?

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.