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

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

Calculate the partial pressure of the NO2 in a sample of this air when the atmospheric pressure is 748 torr (99.7 kPa ).

How many molecules of NO2 are present under these conditions at 17 ∘C in a room that measures 16 × 11 × 6 ft ?

Expert Solution

Concentration of a gas in ppm is also equal to µmol/mol of the gas in the atmosphere. Therefore, the partial pressure of NO₂ is given as

P(NO₂) = (ppm concentration)*10^-6*(atmospheric pressure) = (0.016)*10^-6*(99.7 kPa)*(1000 Pa/1 kPa) = 0.0015952 Pa = 1.5952*10^-3 Pa (ans).

Volume of the room = (16*11*6) ft³ = 1056 ft³ = (1056 cu.ft)*(28.3168 L/1 cu.ft) = 29902.5408 L (ans).

We know that 1 Pa = 9.8692*10^-6 atm.

Use the ideal gas law to calculate the number of moles of NO₂.

P*V = n*R*T

===> (1.5952*10^-3 Pa)*(9.8692*10^-6 atm/1 Pa)*29902.5408 L = n*(0.082 L-1tm/mol.K)*(273 + 17) K

===> n = 1.97967*10^-5 mol.

We know that 1 mole of an ideal gas = 6.023*10²³ molecules; therefore,

1.97967*10^-5 mol NO₂ = (6.023*10²³*1.96967*10^-5) molecules = 1.19235*10¹⁹ molecules ≈ 1.20*10¹⁹ molecules (ans).

queen_honey_blossom answered 2 years ago

In 2006 the United States is at full employment. Then, in 2007: a. The real estate...

In 2006 the United States is at full employment. Then, in 2007: a. The real estate market collapses. Illustrate with a graph the effect of this event on the aggregate economy. Identify the result in the unemployment rate, real GDP and the price level. b. Oil producing countries cut production. Illustrate with a graph the effect of this event on the aggregate economy. Identify the result in the unemployment rate, real GDP and the price level.

(a) How is the concept of concentration in the United States affected by the presence of...

(a) How is the concept of concentration in the United States affected by the presence of foreign firms (not foreign firms that have factories or offices in the United States, but foreign firms that produce in their home countries and then export to the United States and are not included in the measures of C4 and HHI). Do these foreign firms tend to increase or reduce the degree of concentration in U.S. industry? Please explain. (b) An industry consists of...

In 2006, the five leading suppliers of digital cameras in the United States were: Canon, Sony,...

In 2006, the five leading suppliers of digital cameras in the United States were: Canon, Sony, Kodak, Olympus, and Samsung. The combined market share of these five firms was 60.9 percent. The leading firm was Canon, with a market share of 18.7 percent. The own-price elasticity for Canon’s cameras was -4.0 and the market elasticity of demand was -1.6. Suppose that in 2006, the average retail price of a Canon digital camera was $240 and that Canon’s marginal cost was...

Annual per capita consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006)....

Annual per capita consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006). Being from the Midwest, you believe milk consumption is higher there and wish to support your opinion. A sample of 16 individuals from the midwestern town of Webster City showed a sample mean annual consumption of 24.1 gallons with a standard deviation of 4.8. Compute the value of the test statistic. (Round to two decimal places) What is the p-value? (Round to three decimal...

In March 2006, Tesco announced that it would enter the United States convenience store market (Fresh...

In March 2006, Tesco announced that it would enter the United States convenience store market (Fresh and Easy). This represented a departure from its historic strategy of focusing on developing nations. The American market - Fresh & Easy - turned into a financial disaster ($1.8 bn loss) for Tesco. Using Tesco as an example, how you think that Michael Porter’s Five Forces helped or hindered Tesco with its overall global strategy?

The average price for a gallon of gasoline in the United States is 3.75 and in...

The average price for a gallon of gasoline in the United States is 3.75 and in Russia it is 3.37. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of .25 in the United States and a standard deviation of .20 in Russia. a. What is the probability that a randomly selected gas station in the United States charges less than ________ per gallon (to 4...

The average price for a gallon of gasoline in the United States is $3.74 and in...

The average price for a gallon of gasoline in the United States is $3.74 and in Russia it is $3.4. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of $0.25 in the United States and a standard deviation of $0.20 in Russia. a. What is the probability that a randomly selected gas station in the United States charges less than $3.65 per gallon (to 4...

1. In the United States, the estimated annual probability that a woman over the age of...

1. In the United States, the estimated annual probability that a woman over the age of 35 dies of lung cancer is 0.001304 for current smokers and 0.000121 for non-smokers. (a) Calculate and interpret the difference in the proportions and the relative risk. Which is more informative for these data? Why? (b) Calculate and interpret the odds ratio. Explain why the relative risk and the odds ratio take on similar values. 2. For people with a particular type of...

Sweet Air Filtration Products Company, a major supplier of air filters sold throughout the United States,...

Sweet Air Filtration Products Company, a major supplier of air filters sold throughout the United States, employs one hundred workers at its principal manufacturing plant. The plant is located in Thunder Bay, which has a population that is 50 percent white and 25 percent African American, with the balance Hispanic American, Asian American, and others. Sweet Air requires a high school diploma as a condition of employment for its cleaning crew. Three-fourths of the white population completed high school, compared...

The average price for a gallon of gas in the United States is $1.80. Assume that...

The average price for a gallon of gas in the United States is $1.80. Assume that the population standard deviation is $0.50. (a) What is the probability that a sample of 100 gas stations will have a mean price per gallon within ±$0.06 of the population mean? (b) What is the probability that a sample of 100 gas stations will have a mean price per gallon of more than $1.77? (c) What is the probability that a sample of 100...

Question