if a precipitate forms when bacl2 solution is added to a solution of your unknown, which anion is indicated to be present in the unknown?

Silica, sio2, is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when silicon is exposed to o2 gas at an elevated temperature. at 900˚c, it takes 90 minutes for the oxygen to diffuse from the surface to form a 0.06 micron (0.06 x 10-6 m) thick layer of sio2 on

What was the procedure by which case united states vs lopez went to court

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?