How many moles of Na2SO4 can I produce if I react 3.12mol of Na with SO4?

What happens to isotopes that are unstable?

Adilute aqueous potassium nitrate solution is

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.