Question:

Chemistry help, gas laws, need answers asap?

by Guest64260  |  earlier

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I'm taking chemistry online, and this is a timed test, so I need answers fast. I put all of the questions up except for a few that involve images, but any help is appreciated. 5 points to best answer. Thanks in advance:

Question 1 (Multiple Choice Worth 2.0 points)

Which conversion factor below would be used to change liters of oxygen gas to moles of oxygen gas?

22.4 mol gas = 1 L

22.4 L = 1 mol gas

6.02 x 1023 mol gas = 1 L

6.02 x 1023 L = 1 mol gas

Question 2 (Multiple Choice Worth 2.0 points)

Which of the following describes a liquid?

no specific volume/no specific shape

specific volume/specific shape

specific volume/no specific shape

Question 3 (Multiple Choice Worth 2.0 points)

Question 5 (Multiple Choice Worth 2.0 points)

Which of the following describes temperature?

the attractive force among molecules in a substance

the average kinetic energy of the particles in a substance

the heat of the substance

the sublimation of a solid at high temperatures

Question 6 (Multiple Choice Worth 2.0 points)

Convert 2.3 atmospheres to mmHg.

4.2 x 103 atm

5.6 x 10-2atm

3.0 x 10-3 atm

1.7 x 103 atm

Question 7 (Multiple Choice Worth 2 points)

Convert 750 kPa to atm.

70 atm

75.4 atm

7.403 atm

6.983 atm

0.750 kPa

Question 8 (Multiple Choice Worth 2 points)

A sample of gas initially occupies 6.0 cubic meters at a pressure of 1.5 atm. The pressure is then expanded to 2.0 atm. The temperature remaining constant, what is the new volume of the gas?

10 cubic meters

4.5 cubic meters

9.0 cubic meters

3.5 cubic meters

18 cubic meters

Question 9 (Multiple Choice Worth 2 points)

If the temperature of a fixed mass of gas, such as helium in a balloon, is decreased while the pressure remains constant, the volume of the gas will

change in a totally unpredictable manner.

increase.

remain the same.

decrease.

change according to Bolye's Law

none of the above.

Question 10 (Multiple Choice Worth 2 points)

A gas system has pressure, volume and moles of 1410 torr, 8.47 L and 0.346 moles, respectively. What is the temperature in Celsius? (760 torr = 1 atm)

279oC

84oC

127oC

228oC

110oC

Question 11 (Essay Worth 2 points)

What is the relationship between the volume of a gas and the number of moles? What is the name of the law from which we derive this relationship?

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1 ANSWERS


  1. 1. 22.4 L = 1 mol gas

    2.specific volume/no specific shape

    5.

    6.1.7 x 10^3 atm

    7.7.403 atm

    8.4.5 cubic meters

    9.decrease.

    10.-267.53 oC

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