Homework # 5

A.7- Water use analysis (page 20-2)

1. 10, 717
2. 714.5
3. 

4. The range of the average daily personal water use in my class is 1, 493.

5. The mean for my class data is 600 L and the median is 579 L.

6. We water our yards year-round, plus we live in a desert so our class's families use more water.

7. The household is closer 

What do our overall results tell us? Aggregated?
Our overall class results tell us that our families typically have large lawns or many plants that require a large amount of water to keep them alive. Thus, our families use alot of water so we can water all our plants.


ISBS page 52

13.

14. a) i, ii, vi
     b) iii, iv, v

15. atomic weight & atomic number of an element

16. a) 3  Hydrogen atoms,  1 Phosphorus atom , and 4 Oxygen atoms
       b) 1 Sodium atom, 1 Oxygen atom, and 1 Hydrogen atom
       c) 1 Sulfur atom, and 2 Oxygen atoms

17.   

    c)  a. 2 hydrogen + 2 chlorine --> 2 hydrogen and chlorine. b. 2 compounds of hydrogen and oxygen --> 2 water + 2 oxygen.

18. a) Na9 HCO3 + HCl --> NaCl + H2O + CO2

      b) C6 H12 O6 + O6 --> CO6 3 H2O