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adoni [48]
3 years ago
11

Which of the statement below states the negative impact did chemistry have on society through the production and use of chlorofl

uorocarbons (CFCs)? A. Hazardous coolants in refrigeration units were replaced. B. Better refrigeration reduced loss of food through spoilage. C. Lower levels of ozone allowed more ultraviolet radiation to reach Earth. D. Fire safety improved through the use of fire extinguishers.
Chemistry
1 answer:
9966 [12]3 years ago
3 0
I think the correct answer from the choices listed above is option A. The statement that states a negative impact of chemistry on the society is that hazardous <span>coolants in refrigeration units were replaced. One example of this coolant is the </span><span>production and use of chlorofluorocarbons (CFCs) which replaced by more safer coolants.</span>
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22. Which statement best describes the use of catalytic converters in automobiles?
AysviL [449]

Answer:

B. They oxidize hydrocarbons to form less toxic gases.

Explanation:

A catalytic converter can be defined as an anti-pollution device containing a catalyst like platinum-iridium, installed in the exhaust chamber of an automobile so as to chemically convert harmful (poisonous) pollutants such as unburned hydrocarbons and carbon monoxide (CO), sulfur dioxide (S02), nitrogen oxide (NO) etc., into less harmful, poisonous or toxic chemical compounds.

This ultimately implies that, catalytic converters are typically used for converting harmful gases into less harmful, poisonous or toxic gases and molecules e.g carbon dioxide (C02) and water (H2O). This helps to prevent global warming, enhance the conservation of natural resources, as well as preserve the lives of living organisms and their natural habitat.

<em>Hence, the statement which best describes the use of catalytic converters in automobiles is that they oxidize hydrocarbons to form less toxic gases.</em>

3 0
2 years ago
How much heat will be given off when 1500 g of water cools down by 20 C? please help and explain:)))
docker41 [41]

Answer:

126000J

Explanation:

From the question given, we obtained the following information:

M = 1500g

C = 4.2J/g°C

ΔT = 20°C

Q =?

Q= MCΔT

Q = 1500 x 4.2 x 20 =

Q = 126000J

7 0
3 years ago
What is the solution and solvent in Kool-Aid?​
alexandr402 [8]

In this solution the solvent is water and the solutes are sugar, artificial flavor and artificial color. Another interesting property of solutions is that different concentrations of solute can be made. As all of you are aware, you can make very sweet Kool Aid and less sweet Kool Aid.

5 0
2 years ago
Read 2 more answers
Pls can someone help me with this pls
GenaCL600 [577]

Answer:

not sure if this is the right way to answer this question but PbS is Phosphate-buffered saline (i think)

Explanation:

5 0
3 years ago
Number of hydrogen atom(s) in water (H2O)
Ray Of Light [21]

Answer:

Maybe

Explanation:

the number of hydrogen atom in water is 2..

hope it helps

7 0
3 years ago
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