Tricia puts 66 g of dry ice (solid CO2) into a 2.0-L container and seals the top. The dry ice turns to gas at room temperature (20°C). Find the pressure increase in the 2.0-L container. (One mole of CO2 has a mass of 44 g and R = 0.0821 L•atm/mol•K. Ignore the initial volume of the dry ice.)
a. 6.0 atm
c. 18 atm
b. 12 atm
d. 2.0 atm
C
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Which of the following telescopes is most suitable for observing cool gas clouds?
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An object with twice as much mass as another object has twice as much
A) inertia. B) speed. C) acceleration due to gravity. D) all of the above
Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 540 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s)
a. 463 Hz c. 579 Hz b. 540 Hz d. 500 Hz