During extraction of magnesium from seawater, why is a precipitate of magnesium formed, if it is converted into soluble magnesium chloride in the next step?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Which suspect most likely committed the robbery and how do you know

Pls i will do pls imma diewhat forms white light? (4 points)a. combination of all wavelengths of ultraviolet light b. combination of all wavelengths of visible lightc. absorption of electromagnetic waves d. absorption of infrared rays