9. Out of the 55 grams of Sugar water solution, there is 11 grams of sugar and 44 grams of water.
10. 15,000 ppm
11. Having an uneven distribution of electrical charge which means that each molecule has a partial positive region at one end and a partial negative region at the other end.
12. See Drawing
13. a) The negative end, which is oxygen. b) The postive ends, the Hydrogens.
14. Heavy metals are called "heavy" because their atoms have greater masses than those of essential metallic elements.
15. Heavy-metal poisoning symptoms include nervous system, brain kidneys, and liver damage which can lead to death.
16. a) A person may be exposed to Lead by being in a house built before 1978 and painted with Lead paint. They may also be exposed to Lead by automobile electrical storage batteries. b) A person may be exposed to Mercury from eating fish that have been exposed to mercury in the water. They also may be exposed to mercury from a broken flourescent light bulbs.
17. Hydroxide
18. Hydrogen
19. a) basic b) basic c) acidic d) neutral
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