Advanced Placement (AP), 03.04.2020 05:30 deonte4807
Hydrochlorofluorocarbons (HCFCs) are human-made chemicals that have been used as temporary replacements for chlorofluorocarbons (CFCs) in refrigerants because they decompose more readily in the atmosphere and thus pose less of a threat to Earth’s protective ozone layer. Levels of HCFCs have been measured in the stratosphere, and the concentrations of many different HCFCs have been steadily increasing since the mid- to late 1990s.
One important drawback of the use of HCFCs as a replacement for CFCs is that HCFCs:
a) biomagnify in food chains in the Arctic ecosystem
b) combine with water vapor to form acid precipitation
c) are greenhouse gases that contribute to climate change
d) react with carbon monoxide ( CO ) to form ozone in the troposphere
Answers: 3
Advanced Placement (AP), 22.06.2019 11:30
Mr. polanski likes the cost of an hmo plan available in his area, but would like to be able to visit one or two doctors who aren't participating providers. he wants to know if the point of service (pos) option available with some hmos will be of any in this situation. what should you tell him? mr. polanski likes the cost of an hmo plan available in his area, but would like to be able to visit one or two doctors who aren't participating providers. he wants to know if the point of service (pos) option available with some hmos will be of any in this situation. what should you tell him?
Answers: 1
Advanced Placement (AP), 25.06.2019 03:30
Cigarette manufacturers purposefully add to cigarettes in order to give them a particular flavor. a. cocaine b. carcinogens c. cigarette ashes d. a and b
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Advanced Placement (AP), 25.06.2019 20:00
In 2009, florida suffered more fatalities than any other state. a. bicyclist b. child passenger c. pedestrian d. impaired driving
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Advanced Placement (AP), 25.06.2019 23:00
For which plan or plans. is knowing the withdrawal restrictions important ?
Answers: 3
Hydrochlorofluorocarbons (HCFCs) are human-made chemicals that have been used as temporary replaceme...
Business, 28.11.2019 05:31