Textbook Question
The world record for lowest pressure (at sea level) was 652.5 mmHg recorded inside Typhoon Tip on October 12, 1979, in the western Pacific Ocean. Convert this pressure to each indicated unit. a. torr c. in Hg
Ch.5 - Gases
Chapter 5, Problem 11
Suppose that the exhaust stream of an automobile has a flow rate of 2.55 L/s at 655 K and contains a partial pressure of NO of 12.4 torr. What total mass of urea is necessary to react completely with the NO formed during 8.0 hours of driving?
Verified step by step guidance1
Convert the flow rate from liters per second (L/s) to liters per hour (L/h) by multiplying by the number of seconds in an hour.
Calculate the total volume of the exhaust stream over 8.0 hours using the flow rate in L/h.
Use the ideal gas law, PV = nRT, to find the number of moles of NO in the exhaust stream. Remember to convert the pressure from torr to atm and use the appropriate value for R (0.0821 L·atm/mol·K).
Determine the stoichiometry of the reaction between urea and NO. The balanced chemical equation is: 2 NO + (NH2)2CO → N2 + CO2 + 2 H2O.
Calculate the mass of urea needed using the stoichiometry from the balanced equation and the molar mass of urea (60.06 g/mol).
Related Practice
Textbook Question
A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon. b. The molecules or atoms of which gas have the greater average velocity? d. If a small hole were opened in the flask, which gas effuses more quickly?
Textbook Question
The pressure in Denver, Colorado (elevation 5280 ft), averages about 24.9 in Hg. Convert this pressure to each indicated unit. a. atm
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Textbook Question
The pressure in Denver, Colorado (elevation 5280 ft), averages about 24.9 in Hg. Convert this pressure to each indicated unit. b. mmHg
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Textbook Question
The pressure in Denver, Colorado (elevation 5280 ft), averages about 24.9 in Hg. Convert this pressure to each indicated unit. c. psi
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