Chapter 13: Q39P (page 359)
Question 39:(I) How many moles of water are there in 1.000 L at STP? How many molecules?
Short Answer
In1.00 Lof water at STP, there are 55.55 moles and \(3.34 \times {10^{25}}\;{\rm{molecules}}\).
Chapter 13: Q39P (page 359)
Question 39:(I) How many moles of water are there in 1.000 L at STP? How many molecules?
In1.00 Lof water at STP, there are 55.55 moles and \(3.34 \times {10^{25}}\;{\rm{molecules}}\).
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Get started for free(II) If 61.5 L of oxygen at 18.0°C and absolute pressure of 2.45 atmis compressed to 38.8 L, and at the same time, the temperature is raised to 56.0°C, what will the new pressure be?
Consider a container of oxygen gas at a temperature of 23°C that is 1.00 m tall. Compare the gravitational potential energy of a molecule at the top of the container (assuming the potential energy to be zero at the bottom) with the average kinetic energy of the molecules. Is it reasonable to neglect the potential energy?
(II) A sealed metal container contains a gas at 20.0°C and 1.00 atm. To what temperature must the gas be heated for the pressure to double to 2.00 atm? (Ignore the expansion of the container.)
(II) A scuba tank is filled with air to a gauge pressure of 204 atm when the air temperature is 29°C. A diver then jumps into the ocean and, after a short time on the ocean surface, checks the tank's gauge pressure and finds that it is only 191 atm. Assuming the diver has inhaled a negligible amount of air from the tank, what is the temperature of the ocean water?
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