Describe the preparation of 900 mL of 3.00 M HNO; from the commercial reagent that is 70.5% HNO 3 (w/w) and has a specific gravity of 1.42.

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

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.