<em><u>When Zach releases the air from a balloon, it will expand to fill the room.</u></em> It will not expand in the sense that molecules will be big but the molecules will be more spread out into the room and more air molecules will be present to fill the room.
A. convenience equals enormous expense. Things in smaller packages cost way more than things in larger packages, so it’s more cost effective if you buy a bigger bag and then just eat a little bit of it.