How many grams of zinc metal will react completely with 5.4 liters of 2.8 m hcl? show all of the work needed to solve this problem. zn (s) + 2hcl (aq) yields zncl2 (aq) + h2 (g)

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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.

State one important difference between a physical change and a chemical change?