Which alkyl bromide reacts fastest with sodium iodide in acetone: 1-bromobutane or neopentyl bromide

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

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.

The semi-conductors on the periodic table are classified as