Imagine a new lab scenario. You took a clean and dry crucible and measured it to be 25.125 grams. To the crucible, you added 50.0 mL of NaCl solution and placed the solution on a hot plate to evaporate all the water away. You then measured the crucible with solid sodium chloride in it to find that the mass was 28.778 grams. What was the concentration of the NaCl solution

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.