In Chemistry 11 we learned about gases and moles.
the volume occupied by a certain gas depends on the temperature and pressure.
STP the standard temperature and pressure that we are in right now is T = 0°C and the standard pressure is 101.3 kPa
The volume of any gas at STP is 22.4L for every mole
Ex. find the volume of L occupied by 0.060mol of CO2 at STP
0.060 * 22.4l/1mol = 1.3L
find the volume occupied by 3.6kg of fluorine at STP
F2 = 38g
3.6kg * 1000 = 3600g
3600g/38 = 94.737mol
94.737mol * 22.4 = 2121g
If you are still struggling and having problems here is a link showing more examples
http://answers.yahoo.com/question/index?qid=20090804233941AAAvZHL
Looks good, but try to make up your own examples rather than use the ones I do. It will be good practice for you.
ReplyDelete