Any substance used in or
obtained by a chemical process.

they both have a y in them

false

because it does not have the potential to be entirely used up

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

> 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.