A certain element consists of two stable isotopes. The first has an atomic mass of 14.0031 amu and a percent natural abundance of 99.63 %.
The second has an atomic mass of 15.0001 amu and a percent natural abundance of 0.37 %.

6.4 cm (max) - 25 cm (min)

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.