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Chemistry Gas Laws

Q. A sample of damp air in a 1.00 L container exerts a total pressure of 741.0 torr at 20 °C; but when it is cooled to -10 °C, the water vapor freezes to ice with negligible pressure giving a pressure of 607.1 torr. How many molecules of water were present in the gas? A. 4.69 x 10^18 B. 8.44 x 10^19 C. 2.82 x 10^20 D. 7.11 x 10^18 E. 2.14 x 10^21

Solved • Apr 8, 2020

Chemistry Gas Laws

Q. A 44.9-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass of Ar is required to exert half the pressure at the same conditions of volume and temperature? A. 897 g Ar B. 178 g Ar C. 1.11 g Ar D. 88.9 g Ar E. 44.4 g Ar

Solved • Apr 8, 2020

Chemistry Gas Laws

Q. A sample of He gas (3.0 L) at 5.6 atm and 25°C was combined with 4.5 L of Ne gas at 3.6 atm and 25°C at constant temperature in a 9.0 L flask. the total pressure in flask was _____ atm. Assume the initial pressure in the flask was 0.00 atm. A. 2.6 B. 9.2 C. 1.0 D. 3.7 E. 24

Solved • Apr 8, 2020

Chemistry Gas Laws

Q. Calculate the volume of a sample of carbon monoxide at 214°C and 367 torr if it occupies 3.65 L at 298 K and 745 torr. A. 1.56L B. 2.07L C. 6.44L D. 8.53L E. None of these is within 5% of the correct answer.

Solved • Apr 3, 2020

Chemistry Gas Laws

Q. What is the effect of the following o the volume of 1 mol of an ideal gas? The pressure changes from 760 torr to 202 kPa and the temperature changes fro 37.0°C to 155 K. A. Volume of gas does not change. B. New volume is 25% of the original volume C. New volume is 400% of the original volume D. New volume is 200% of the original volume E. New volume is 50% of the original volume

Solved • Apr 3, 2020

Chemistry Gas Laws

Q. Which of the following diagrams correctly shows how a gas fills a balloon?

Solved • Apr 3, 2020

Chemistry Gas Laws

Q. A sample of hydrogen gas is contained in a balloon. The volume of the balloon is 2.15 L at 15°C. The temperature is changed until the volume of the balloon is 3.25 L. what is the new temperature of the gas in °C? A. 162 B. 23 C. -82 D. 191 E. 435

Solved • Apr 3, 2020