What happened when bromine reacted with aluminum?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

How does the motion of particles in a gas change as the gas cools

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.