Homework #7

ISBS, p. 50-52

13. See model

14. A. models ii, IV, VI, and I.

      b. Models iii and v.

15. A chemical formula each has each element with a subscript to identify how many atoms are in one part of the element and or substance.

16.

a. 3 Hydrogen atoms, 1 Phosphorus atoms, and 4 Oxygen atoms.

b. 1 Sodium atom, 1 Oxygen atom, and 1 Hydrogen atom.

c. 1 Sulfur atom and 2 Oxygen atoms.  

17. See drawings.

18. A. NaHCO3 + HCl → NaCl + H2O + CO2

     b. C6H12O6 + O6 → 6 CO2 + 6 H2O

A.7 #1-7:

1.  Total Water Volume: 1481 liters.

2. 164.6 liters of water in a day.

Numbers 3-7 can be answered once a histogram is created. 

3. 

          100-300                     300-500                500-800

4. The range is about 594.5

5. The mean of all of the data is 530 liters and the median is 489.56.

6. The difference between our mean and the national value is 160 because of the larger households, the landscaping, and the washing of cars.  

7. Only one person was close to the national average.