Create an atom with atomic number equal to 2

h let me think

> 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.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter