0.5 mg/mL would be expressed as 500 ug/uL
light-colored, silica-rich igneous rock that is less dense than basaltic rock. dense, dark-colored igneous rock formed from magma;rich in magnesium and iron and poor in silica. Describes magma or igneous rock that is rich in feldspars and silica and that is generally light in color.
AgBr(s) <—> Ag+(aq) + Br-(aq)
Ksp = [Ag+][Br-]