When 14.8 grams of an ionic substance ( cation + anion have the same charge ) is dissolved in 125.0 g of ethanol , the solution begins to boil at 81.2C Calculate the molar mass of this solute. (i need work aswell)

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.