For the reaction CH4(g) + 2H2S(g) ↔ CS2(g) + 4H2(g), after disrupting equilibrium the initial values for each gas were 1.24M CH4, 1.52M H2S, 0.285M CS2, and 0.233M H2. The original value for Kc was 0.00012, which means what about Q?

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.