Homework 6/29

Page 82 #9-19

9.  20% of 55 =11 grams of sugar 55-11= 44 grams of water

10. 0.0015 x 1,000,000 = 1500 ppm

11.  Water molecules are polar not only because of the opposite positive and negative sides, but also because oxygen is electronegative than hydrogen.

12. 

13. A) O-

      B) H+

14. The heavy metals are called “heavy” because they have a larger mass than other elements, and can be extremely dangerous.

15. 3 symptoms: damage to nervous system of liver, brain, and kidneys.

16. A) Paint and pottery and water in pipes

 B) High consumption of fish and fluorescent light

17. Hydroxide ion

18. Hydrogen Atom

19.  A) Basic

      B) Basic

      C) Acidic

      D) Neutral