Name: ____________________________________

Date: _______________ Period: ______

Density Problems - Calculations with Grids Std4e

Assignment 1 - Directions: Use Table C-6 on p. 916 of your textbook to find densities for the elements listed. Then rewrite the DENSITY in the next column as shown in the examples. Last, solve the problems give in the far right column on the back of this paper. Number from 1-10 on the back of this paper, or a separate sheet of paper, and show the grids for your calculations and circle your answers. Units of measure are essential. See examples at the beginning of chart of this page.

 

Elements

Density

 

_____ g

=

_____ cm3

Number from 1-10 on the back of this paper. Show your calculations (with grids) by each number.

 

 

 

 

 

 

 

 

Ex - a. sulfur

2.08 g/cm3

 

2.08 g S

=

1 cm3 S

If you are given 13 cm3 of S, how much would it weigh in grams?

Ex - b. calcium

8.65 g/cm3

 

8.65 g Ca

=

1 cm3 Ca

If you are given 41.7 g of Ca, how many cm3 of Ca would you have?

1. cobalt

 

 

 

 

 

 

If you are given 24 cm3 of Co, how much would it weigh in grams?

2. boron

 

 

 

 

 

 

If you are given 105 g of B, how many cm3 of B would you have?

3. gallium

 

 

 

 

 

 

If you are given 11 cm3 of Ga, how much would it weigh in grams?

4. iron

 

 

 

 

 

 

If you are given 82.2 g of Fe, how many cm3 of Fe would you have?

5. mercury

 

 

 

 

 

If you are given 13 cm3 of Hg, how much would it weigh in grams?

6. oxygen

 

 

 

 

 

 

If you are given 91.9 g of O, how many cm3 of O would you have?

7. zinc

 

 

 

 

 

 

If you are given 2.91 cm3 of Zn, how much would it weigh in grams?

8. silver

 

 

 

 

 

 

If you are given 77.3 g of Ag, how many cm3 of Ag would you have?

9. tin

 

 

 

 

 

 

If you are given 2.77 g of Sn, how many cm3 of Sn would you have?

10. tungsten

 

 

 

 

 

If you are given 152 g of W, how many cm3 of W would you have?

 


Name: ____________________________________

Date: _______________ Period: ______

Solutions to example problems in Assignment 1:

Ex a (using grids, shown here as fractions)

13 cm3 of S 2.08 g of S

------------------- x ------------------- = 27 g of S

1 1 cm3 of S

Ex b (using grids, shown here as fractions)

41.7 g of Ca 1 cm3 of Ca

-------------------- x ------------------ = 4.82 cm3 of Ca

1                                                  8.65 g of Ca

 

Assignment 2 - Directions: Solve each of these problems as you did in Assignment 1 above. Use the densities from Assignment 1. Show your work. If you do not use grids, you will not get any points for this assignment

 

11. cobalt If you are given 214 g of Co, how many cm3 of Co would you have?

 

12. boron If you are given 42.7 cm3 of B, how much would it weigh in grams?

 

13. gallium If you are given 64.9 g of B, how many cm3 of B would you have?

 

14. iron If you are given 10.4 cm3 of Fe, how much would it weigh in grams?

 

15. mercury If you are given 175.9 g of Hg, how many cm3 of B would you have?

 

16. oxygen If you are given 64,310 cm3 of O, how much would it weigh in grams?

 

17. zinc If you are given 20.78 g of Zn, how many cm3 of Zn would you have?

 

18. silver If you are given 7.369 cm3 of Ag, how much would it weigh in grams?

 

19. tin If you are given 0.3813 cm3 of Sn, how much would it weigh in grams?

 

20. tungsten If you are given 7.917 cm3 of W, how much would it weigh in grams?