For each redox reaction shown below, identify the substance oxidized, the substance reduced, and, if any, spectator ions. A. 4Al(s) + 3O₂ → 2Al₂0₃ (s)
B. Cl₂ (aq) + 2KI (aq) → I₂ (s) + 2KCl (aq)

  the mississippians were considered to be  horticulturalists, which means they were

Can someone me with 3 and 4 plz. this is for masteries test.

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.