Atomic-mass and many others pptx. HEHEHEHEHHE

Understanding Atomic Mass

1. COUNTING BY WEIGHING Ms. Lilia sells shelled peanuts in a store. But she meets customers asking for 150 peanuts, another for 750 peanuts, and another for 2,000 peanuts. Obviously, it will take Ms. Lilia a very long time to count the peanuts. What would be another way to count them?

2. ATOMIC MASS

3. AVERAGE ATOMIC MASS For the class in Chem 345, the teacher informs the class that the final grade will be based on Exam 1 (15%), Exam 2 (15%), Problem Sets (30%), and Final Exam (40%). To pass the course, the learner must get a final grade of 75% or higher. Calculate the final grade of learner Ms. Julita if she got the following scores:

4. AVERAGE ATOMIC MASS Isotopes of elements occur in different abundances. Some are more abundant than others.

5. PRACTICE EXERCISES: From the periodic table, look up the average atomic mass of the following elements: Co, Be, Al, Zn. Copper has two stable isotopes with the following masses and % abundances: Cu-63 (62.93 amu , 69.09% abundance) and Cu-65 (64.9278 amu , 30.91% abundance). Calculate the average atomic mass of copper. An element consists of an isotope with mass of 10.0129 amu and 19.91% abundance, and another isotope with mass of 11.0093 amu and 80.09% abundance. Calculate the average atomic mass of this element. Refer to the periodic table and identify the element

6. AVERAGE MOLECULAR MASS The molecular mass is the sum of the average atomic masses of the atoms in the molecule.

7. AVERAGE FORMULA MASS The formula mass is the sum of the atomic mass of the atoms in the ionic compound

8. GROUP ACTIVITY

9. GLUCOSE

10. WATER

11. METHANE

12. CARBON DIOXIDE

13. AMMONIA

14. ETHANOL

15. SULFURIC ACID

16. CALCIUM CARBONATE

17. ACETIC ACID

18. HYDROCHLORIC ACID

19. SODIUM CHLORIDE

20. POTASSIUM NITRATE

21. PHOSPHORIC ACID

22. BENZENE

23. SODIUM BICARBONATE

24. MAGNESIUM SULFATE

25. Hydrogen peroxide

26. CALCIUM CHLORIDE

27. SODIUM HYDROXIDE

28. ZINC SULFATE

29. Copper (ii) SULFATE

30. Calcium hydroxide