1 / 24

COUNT ATOM

COUNT ATOM. How to count atoms. 2H 2 O. COEFFICIENT. SUBSCRIPT. 2H 2 O. The coefficient gets applied to the ENTIRE formula -this means that there are 2 molecules of water present! -you MULTIPLY this number by every subscript in the formula. 2H 2 O. 2MOLECULES!!!!. 2H 2 O.

racquelg
Download Presentation

COUNT ATOM

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. COUNT ATOM How to count atoms

  2. 2H2O COEFFICIENT SUBSCRIPT

  3. 2H2O The coefficient gets applied to the ENTIRE formula -this means that there are 2 molecules of water present! -you MULTIPLY this number by every subscript in the formula

  4. 2H2O 2MOLECULES!!!!

  5. 2H2O The subscript only gets applied to the element it follows -If there is no subscript present, it is assumed that there is only 1atom of that element in the molecule.

  6. 2H2O How many hydrogen atoms are present? 4 How many oxygen atoms are present? 2

  7. The easiest way to count atoms: 1. Write down all of the symbols for all of the elements present in the formula 2. If there is a coefficient, write this number next to each of the symbols 3. Multiply the coefficient by the subscripts of each of the elements present in the formula

  8. Let’s try an example: 4CaCO3

  9. 4CaCO3

  10. 1. Write down symbols 4CaCO3 Ca C O

  11. Write down the coefficient next to each symbol 4CaCO3 Ca C O 4 4 4

  12. Multiply by the subscript 4CaCO3 Ca C O 4 4 4 X X X 1 1 3

  13. Multiply… 4CaCO3 Ca C O 4 4 4 X X X 1 1 3 = = = 4 4 12

  14. Add totals together to get the total amount of atoms 4CaCO3 Ca C O 4 4 4 X X X 1 1 3 = = = 4 4 12 20 atoms

  15. 3CO2

  16. 3CO2

  17. 2C6H12O6 GLUCOSE

  18. 2C6H12O6

  19. 6K2SO4

  20. 6K2SO4

  21. CaMg(CO3)2

  22. CaMg(CO3)2

  23. 3Pb(NO3)2

  24. 3Pb(NO3)2

More Related