An amount charcoal is burned to produce 4.2x106 cal energy. What mass of water can be heated from 25.0 ºC to 150.0 ºC with this amount of energy? The specific heat of water is 1.000 cal/g ºC.

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.