Problem 18.80 The estimated average concentration of NO2 in air in the United St

Question

Problem 18.80

The estimated average concentration of NO2 in air in the United States in 2006 was 0.016 ppm.

Part A

Calculate the partial pressure of the NO2 in a sample of this air when the atmospheric pressure is 747torr (99.6kPa ).

Express your answer using two significant figures.

SubmitMy AnswersGive Up

Part B

How many molecules of NO2 are present under these conditions at 15?C in a room that measures 10

Problem 18.80

The estimated average concentration of NO2 in air in the United States in 2006 was 0.016 ppm.

Part A

Calculate the partial pressure of the NO2 in a sample of this air when the atmospheric pressure is 747torr (99.6kPa ).

Express your answer using two significant figures.

SubmitMy AnswersGive Up

Part B

How many molecules of NO2 are present under these conditions at 15?C in a room that measures 10

Explanation / Answer

Partial Pressure:

Pa = mole fraction of a * Total pressure

Pt = 747 torr

NOTE: Assume ppm is in mole (part per million moles)

Mole Fraction NO2 = 0.016 ppm or 0.016 mol per 10^6 mol of air = 1.6*10^-8 mol of NO2/mol air

Pa = (1.6*10^-8) * 747 = 1.1195*10^-5 torr

PART B

How many molecules of NO2 are present under these conditions at 15?C in a room that measures 10

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects