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?