Answer Happy

QUESTION 1 True or False. All methods of treating water have both advantages (benefits) and drawbacks. True False QUESTION 2 True or false. In both tap water and bottled water if minerals.or ingredients are below certain concentrations they are not present on the label True False QUESTION 3 30% of the water on the planet (both surface and ground water sources) is fresh or potable water, True False QUESTION 4 True or false. Most waterborne diseases are a thing of the past in much of North America and Western Europe True False
QUESTIONS What is the definition of an aquifer? a great pools of water trapped in sand and gravel 50 to 500 feet below the surface of the planet. O b. Surface waters (Lakes, rivers, streams) QUESTION 6 Most Americans get their water from drinking fountains or faucets. Which of these is a disadvantage of water from drinking fountains or faucets, asate b.readily available O inexpensive d. Treated with chlorine QUESTION 7 Water is a solvent. What does this mean? It can dissolve other substances It is dissolved by other substances It is a solute it is a solution
QUESTIONS What is the Safe Drinking Water Act? O Establishes limits on the amounts of pollutants that industries can discharge into surface waters *b Federal laws that provides public health protection to all Americans who get their water from public and also bottled water supplies. water? QUESTION 9 Distration is a separation process where a solution is heated to the boiling point and the vapors are condensed and collected What is an advantage of distillation for purifying OaRequires a lot ot energy Ob can make water with no detectable amount of contaminants Only economical for countries with abundant and cheap sources of energy QUESTION 10 In 1854 Dr. John Snow approached City Officials in the Scho district of London and proposed they take a course of action. How did he convince the city officials that the Broadtreet pump was the source for the Cholera epidemicraving that part of London They did nothing Othey took his word for it O with evidence a map showing that the outbreak was centered at the pump and a pamphlet on the mode of communication of cholera
QUESTION 11 Which has a higher specific heat (or molar heat capacity), water or mercury? O a.mercury b.water QUESTION 12 Which of the following can be used to treat drinking water? a. chlorination O b. ozonolysis (use of ozone) UV Radiation O d. All of the above (a, b and c) Oc QUESTION 13 An atom of sodium has 11 electrons. How many electrons does an ion of sodium, Na+1, have? O a.g O 6.10 O c. 11 O d.12
QUESTION 14 True or False. The appearance of water be used to judge whether it is clean or not. True False QUESTION 15 Edward Frankland developed methods to detect organic nitrogen in water. He assumed that this nitrogen originated from sewage or manure allowing the water to be contaminated with deadly agents that caused cholera. Which of these was an advantage of his methods? 2. Took 6-months to learn Ob expensive OC Laborious Od Erred on the side of caution QUESTION 16 True or false. The hurrian body is an aqueous solution True O False
True or False Potable water is safe to drink True False QUESTION 18 The Maximum Contaminant Level (MCL) for copper is 13 ppm, 10.0 ppm of copper is found in a natural spring that supplies bortled water will the water have to be treated to remove copper prior bottling and selling the product? O No, it will not have to be treated Obvest will have to be treated QUESTION 19 Which is the legal limit for a contaminant in drinking water? MCL or MCLG? OMCLG MCL QUESTION 20 Bottled water is pure water that is there are no other chemicals present at any concentration True Faber