The gas phase decomposition of nitrogen dioxide at 383 °C NO2(g) --> NO(g) + ½ O2(g) is second order in NO2 with a rate constant of 0.540 M-1 s-1. If the initial concentration of NO2 is 0.355 M, the concentration of NO2 will be M after 15.9 seconds have passed.

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.