Asubstance that produces hydroxide ions when placed in water is a(n)

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Positrons are spontaneously emitted from the nuclei of