The gas phase decomposition of NO2, 2NO2(g)→ 2NO(g) + O2(g), is studied at 383°C, giving the following data: Time (s) [NO2] (M) 0.0 0.100 5.0 0.017 10.0 0.0090 15.0 0.0062 20.0 0.0047 a. What is the rate law? b. What is the integrated rate law? c. What is the value of the rate constant? d. Determine the concentration of NO2 12.5s after the start of the reaction.

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.