The ozone layer is important because A ozone absorbs low energy radiation which

The ozone layer is important because a ozone absorbs

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79. The ozone layer is important because A) ozone absorbs low energy radiation which warms the troposphere. B) ozone purifies the atmosphere by reacting with excess fluorocarbons. C) ozone absorbs ultraviolet radiation. D) ozone reflects high energy radiation such as X-rays and gamma rays. E) humans need to breathe air containing some ozone. Ans: C Difficulty: E 80. Nitrogen will behave most like an ideal gas 81. The ideal gas law tends to become inaccurate when 82. Use the van der Waals equation for real gases to calculate the pressure exerted by 1.00 mole of ammonia at 27°C in a 750-mL container. (a= 4.17 L2atm/mol2, b= 0.0371 L/mol)
Chapter 5: Gases and the Kinetic-Molecular Theory Page 80 83. At moderate pressures (~ 200 atm), the measured pressure exerted by CO2gas is less than that predicted by the ideal gas equation. This is mainly because A) such high pressures cannot be accurately measured. B) CO2will condense to a liquid at 200 atm pressure. C) gas phase collisions prevent CO2molecules from colliding with the walls of the container. D) of attractive intermolecular forces between CO2molecules. E) the volume occupied by the CO2molecules themselves becomes significant. Ans: D Difficulty: M 84. At very high pressures (~ 1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because 85. State Charles's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables. Ans: At constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature. The plot should be Vvs. T, showing a straight line of positive slope, passing through the origin. Difficulty: M 86. State Boyle's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

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