How many elements make up the compound H2SO4

In 2002, the rare earth elements mine in mountain pass, california was closed because

Some molecular compounds, such as hcl, ionize completely in solution. for molecular compounds such as h2co3, most molecules do not ionize in solution. which describes the properties of these two solutes? a. hcl and h2co3 have the same effect on the properties of the solution. b. hcl raises the freezing point of water more than h2co3 does. c. hcl raises the boiling point of water more than h2co3 does.

Aseismic wave is energy released as the result of rock movement along a fault. t or f ?