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making big announcement
hydrogen: Hello my sweet friends!
helium: Best viewed in chrome.
lithium: Stay or leave, and please tag! Kiss!
beryllium: Showing 3 posts on main page! Click archives roll on top for monthly archives. 		boron: refresh
carbon: close windows and study for a test so i can slack 2mrw!
nitrogen: again, remeber to tag! :D
oxygen: filling up space for fun!

chemists.(｡◕‿‿◕｡)
chloe ko.
christina chow.
mr. doktor's chemistry class
block g


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Multistep Conversions:
Wednesday, December 8, 2010 /5:57 PM

Examples:
1) 2.8g of Flourine gas was found in an area at STP. Determine the volume in that area.
2.8g x 1 mol = 0.073684mol
               38g
0.073684 mol x 22.4 L =  1.7 L
                              1 mol

2) A sample of Argon gas contains 8.1 x 1020  molecules. How many grams of Argon is this?
8.1 x 1020 molecules x 1 mol x 39.9g = 0.054g
                                 6.02 x 1023        1 mol

3) A sample of Sulphur occupies 3.9 L. How many atoms are present in this sample?
3.9 L x 1 mol = 0.174107 mol x 6.02 x 1023 =  1 x 1023 atoms    
              22.4 L                            1 mol

4) A container hold 51.3 L of  Acetic Aced gas at STP. How many molcules of Acetic Acid is this?
 51.3 L x 1 mol = 2.29017 mol x 6.02 x 1023 = 1.38 x 1024 molecules
               22.4 L                           1 mol

~christina :]