The pH of a 0.0001M (10-4 M) HCl solution is ; The pH of a sample of milk is 6.5, while a sample of soft drink has a pH of 4.5. The hydrogen ion concentrations ([H ]) of the two samples are .

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

Name the element in group 17, period 2. (periodic table)

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process