1 / 8

Could you determine the amount of atoms in this block of aluminum?

Could you determine the amount of atoms in this block of aluminum?. What information would you need?. The periodic table has a secret! It can tell you the amount of atoms in a specific mass of each element.

diem
Download Presentation

Could you determine the amount of atoms in this block of aluminum?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Could you determine the amount of atoms in this block of aluminum?

  2. What information would you need? The periodic table has a secret! It can tell you the amount of atoms in a specific mass of each element

  3. Look at the amu of aluminum. The amu also describes the number of atoms in a specific mass in g • Ex: There are 6.02 X10 23 atoms/26.98 g of aluminum • Could you determine the amount of atoms in any piece of aluminum? • Go ahead…..

  4. 6.02 X10 23 is a huge number!!! • It is a unit of measurement that scientists use. Just as chefs use the dozen (12) • This is manageable because atoms are so tiny • They call this number a mole!! (sometimes abbreviated mol) • With this new information could you determine the amount of moles if I gave you a specific mass of an element? • Write a conversion you could use. • Ex If I have .500g H 1mol/1.008g How many mols do I have try it… • .500g H 1 mol/1.008g = .496 mols of H

  5. If I gave you the amount of mols could you give me the mass? • .496 mols of H .1.008g H/mol = .500g H • If I gave you the number of atoms could you determine the mass? • Remember there are 6.02 X10 23 atoms in a mol and the molar mass is the mass of one mole • Find the mass of 2.03 X10 23 atoms of S • 2.03 X10 23 atoms S 1 mol/6.02 X 10 23 atoms S 32.055g S/1 mol • Answer = 10.8 g S

  6. Could you determine the amount of moles if I gave you the amount of atoms? • 3.02 X 10 23 atoms of Ca is how many moles? • 3.02 X10 23 atoms Ca 1 mol/ 6.02 X 10 23 atoms Ca = .502 mols Ca

  7. Could you determine the amount of atoms in a specific amount of moles? • 2.3 mols of Sr • 2.3 mols 6.02 X 10 23 atoms/1 mol = 1.4 X 10 24 atoms

  8. How about the number of atoms in a specific amount of mass? • 345 g of Ca • 345 g Ca 1 mol/40.078g 6.02 X 10 23 atoms/1 mol

More Related