What will a medium mass star become at the very end of its life cycle

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.