The production of iron and carbon dioxide from Iron(III) oxide and carbon monoxide is an exothermic reaction. How many kilojoules of heat are produced when 3.4 mol Fe2O3 reacts with excess CO? Fe2O3(s) + 3 CO(g) 2 Fe(s) + 3 CO2(g) + 26.3 kJ

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.