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Artyom0805 [142]
3 years ago
6

Write a short report describing the Montreal Protocol and more recent environmental measures to reduce CFCs.

Chemistry
1 answer:
dedylja [7]3 years ago
3 0

Answer:

Montreal protocol is an international treaty signed by many countries across the globe to regulate the manufacturing and usage of substances like chlorofluorocarbons and to take measures to protect the ozone layer.

Explanation:

Montreal protocol was signed on 16th September 1987 and it was enforced on January 1st 1989. It was singed all the 197 countries who acknowledged the importance of restoring and protecting the ozone layer. The treaty has various articles under it like -(Article 2) Calculation of control levels to control the usage of ozone depleting substances.

some of the recent measures to reduce CFCs are:-

1. UN environment programme had released a list of products for the public that deplete the ozone layer and another list that doesn't. so that the public can make wise purchasing decisions.

2. Safe disposal of appliances like ACs, refrigerator and coolers that contain CFCs

3. Different policies are made by the UN environmental protection agency and organisations like national resource defense council to regulate and reduce the production and usage of CFCs.

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What are the raw materials of respiration
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The raw materials of respiration is the air we inhale. it goes in and is purified by the lungs
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3 years ago
The reaction of 60.0 g of aluminum oxide with 30.0 g of carbon produced CO gas and 22.5 g of aluminum metal. What is the percent
natulia [17]

Answer:

The answer to your question is: 70.8%

Explanation:

Data

Al₂O₃ = 60 g

C = 30 g

CO = gas

Al = 22.5 g

MW Al₂O₃ = 102 g

MW C = 12 g

MW Al = 54 g

Reaction

                 Al₂O₃    +     3C     ⇒       3 CO    +    2 Al

Limiting reactant

                            102 g of Al₂O₃  -------------- 54 g Al

                             60 g                 --------------   x

                             x = 31.8 g

                            36 g of C ------------------ 54 g of Al

                            30 g of C ------------------  x

                            x = 45 g of Al

Limiting reactant = Al₂O₃

Percent yield = \frac{22.5}{31.8} x 100

Percent yield = 70.75 %

5 0
3 years ago
How could energy conservation help to control or decrease air, water, and land pollution?
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Energy conservation and pollution reduction go hand-in-hand, as the power plants that generate your electricity often release arsenic, mercury, other metals and acid gases that threaten human health and the environment.
8 0
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Why are we able to measure the atmospheric pressure in the room and equate this to the pressure of a gas in a test tube?
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Atmospheric pressure is measured with a barometer. A barometer consists of an evacuated vertical tube with its top end closed and its bottom end resting in a container of mercury that is open to the atmosphere The pressure exerted by the atmosphere acts on the exposed surface of the liquid to force mercury up into the tube. Sea level atmospheric pressure will support a mercury column generally not more than 29.92-in. high. Thus, the standard for atmospheric pressure at sea level is 29.92 in.-Hg, which translates to an absolute pressure of 14.69 psia.
The two basic reference points in all these measurements are standard atmospheric pressure and a perfect vacuum.
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Select the correct answer. When an atom in a reactant loses electrons, what happens to its oxidation number? A. Its oxidation nu
vfiekz [6]

Answer:

C. Its oxidation number increases.

Explanation:

  • <em><u>Oxidation is defined as the loss of electrons by an atom while reduction is the gain of electrons by an atom</u></em>.
  • Atoms of elements have an oxidation number of Zero in their elemental state.
  • When an atom looses electrons it undergoes oxidation and its oxidation number increases.
  • For example, <em><u>an atom of sodium (Na) at its elemental state has an oxidation number of 0. When the sodium atom looses an electrons it becomes a cation, Na+, with an oxidation number of +1 , the loss of electron shows an increase in oxidation number from 0 to +1.</u></em>
8 0
3 years ago
Read 2 more answers
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