What is the concentration of each of the following gases in clean, dry air? Expr

Question

What is the concentration of each of the following gases in clean, dry air? Express the concentration in percent and parts per million. O_2 CO_2 N_2 Ar Define primary air pollutant. List the five primary air pollutants. What is the energy, in kilojoules per mole, associated with photons having the following wavelengths? What is the significance of each of these wave- lengths 1 Deduce the balanced reaction in which ammonia reacts with nitrogen dioxide to produce molecular nitrogen and water. Using the balanced equation, calculate the mass of ammonia that is required to react with 1000 L of air at 27 degree C, 1 atm pressure, containing 10 ppm of NO_2 The steady-state concentration of an atmospheric gas of molar mass 42 g/mol is 7.0 pg/g of air and its residence time is 14 years. What is the annual total release of the gas into the atmosphere as a whole? The total mass of the atmosphere is 5.1 times 10^21 gair.

Explanation / Answer

1)Clean , dry air contains

Nitrogen 78.09% (780,900 ppm)

Oxygen 20.95% (209,500 ppm)

Argon 0.93% (9300 ppm)

Carbon dioxide 0.039% (390 ppm)

2)A primary pollutant is is released directly from a source.

Examples:Carbon monoxide ,carbon dioxide,sulfur dioxide,oxides of nitrogen and volatile organic compounds.

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