Tin (ii) fluoride (snf2), or stannous fluoride, is used in some home dental treatment products. it is made by the reaction of tin with hydrogen fluoride according to the equation sn (s) + 2hf (g) ? snf2 (s) + h2 (g). how many grams of snf2 are produced from the reaction of 30.00 g of hf with sn?

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.