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The substance that could be found in air, water or soil that is harmful to humans or animals is called pollutant.
Pollutants are the only harmful substances that can be found in these three places. Carbon Dioxide (CO₂) is commonly found in the air, fossil fuels are found in soil and water and smog is found in the air. Only pollutant can be found in these three places as there are varied in its chemical structure. Common pollutants include Sulfur Dioxide (SO₂) which can be found in the air, and Lead, which can be found in water or soil.
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We can use the combined gas law equation to solve for the initial volume

parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
substituting the values in the equation

V = 8.50 L
the initial volume is 8.50 L
Answer:
n=N/NA
n= 3.754×10²³/6.02×10²³
n= 6.24 s
Explanation
since there is number of molecules, make use of Avogadro's constant to get number of moles.
Answer:
Boyle's law states that the volume of a fixed mass of agass at constant temperature is inversely proportional to its pressure