Lichter CHM1045 Quizzes (5A-5B) (Spring 2012)

7/27/2019 Lichter CHM1045 Quizzes (5A-5B) (Spring 2012)

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Chapter 5 Quiz

Review of attempt 1

Finish review Started on Friday, 24 February 2012, 04:42 PM

Completed on Tuesday, 28 February 2012, 08:33 PM

Time taken 4 days 3 hours

Grade 6 out of a maximum of 10 (60%)

Question1Marks: 1

A 0.50 mol sample of oxygen gas is confined a 0 C in a cylinder. The initial pressure inthe cylinder is 1.0 atm. If the gas is compressed by a piston so that the final volume is64.2% of the initial volume and the final pressure of the gas is 2.75 atm. What is thefinal temperature of the gas in kelvin? Enter your answer to the nearest degree.

Answer:

IncorrectMarks for this submission: 0/1.

Question2Marks: 1

What volume, in mL, of oxygen are required to react completely with 237 mL of C 4H10 atthe same pressure. Calculate your answer to the correct number of sig figs and enter350 as 3.50E2.

Answer:


Question3Marks: 1


2/9

A balloon filled with helium gas at 20 C occupies 2.91 L at 1.00 atm. The balloon is

immersed in liquid nitrogen at -196 C, raising the pressure to 5.20 atm. What is thevolume of the balloon in the liquid nitrogen?

Choose one answer.

a. 0.15 L

b. 2.1 L

c. 4.0 L

d. 58 L

Correct

Marks for this submission: 1/1.

Question4Marks: 1

A gas bottle contains 0.650 mol of gas at 730 mm Hg pressure. If the final pressure is1.15 atm, how many moles of gas were added to the bottle?

Choose one answer.

a. 0.0680 mol

b. 0.128 mol

c. 0.717 mol

d. 0.778 mol


Question5Marks: 1

The volume of 350. mL of gas at 25 C is decreased to 125 mL at constant pressure.What is the final temperature of the gas?

Choose one answer.

a. -167 C


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b. 8.9 C

c. 70 C

d. 561 C


Question6Marks: 1

If the number of moles of gas is doubled at constant temperature and volume, thepressure of the gas

Choose one answer.

a. is halved.

b. is doubled.

c. is quadrupled.

d. remains the same.

CorrectMarks for this submission: 1/1.

Question7Marks: 1

Three identical flasks contain three different gases at standard temperature andpressure. Flask A contains CH4, flask B contains CO2, flask C contains N2. Which flaskcontains the largest number of molecules?

Choose one answer.

a. flask A

b. flask B

c. flask C

d. All flasks contain the same number of molecules.


Question8


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Marks: 1

How many grams of O2 gas are there in a 5.00-L cylinder at 4.00 x 103 mm Hg and 23

C?

Choose one answer.a. 17.3 g

b. 34.7 g

c. 446 g

d. 2.63 x 104 g


Question9Marks: 1

What is the Celsius temperature of 100.0 g of chlorine gas in a 40.0-L container at 800mm Hg?

Choose one answer.

a. -91 C

b. 91 C

c. 182 C

d. 364 C


Question10Marks: 1

Cyanogen is a gas which contains 46.2% C and 53.8% N by mass. At a temperature of

25 C and a pressure of 750 mm Hg, 1.50 g of cyanogen occupies 0.714 L. What isthe molecular formula of cyanogen?

Choose one answer.


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a. CN

b. C2N2

c. C3N4

d. C4N5


Finish review

Chapter 5 Quiz

Review of attempt 2

Finish review

Started on Wednesday, 29 February 2012, 11:15 AM

Completed on Wednesday, 29 February 2012, 11:42 AM

Time taken 27 mins 36 secs

Grade 10 out of a maximum of 10 (100%)

Question1Marks: 1

A 0.50 mol sample of oxygen gas is confined a 0 C in a cylinder. The initial pressure inthe cylinder is 1.0 atm. If the gas is compressed by a piston so that the final volume is48.4% of the initial volume and the final pressure of the gas is 4.79 atm. What is thefinal temperature of the gas in kelvin? Enter your answer to the nearest degree.

Answer:633


Question2


6/9

Marks: 1

What volume, in mL, of oxygen are required to react completely with 252 mL of C 4H10 atthe same pressure. Calculate your answer to the correct number of sig figs and enter350 as 3.50E2.

Answer:1.638E3


Question3Marks: 1

A balloon filled with helium gas at 20 C occupies 2.91 L at 1.00 atm. The balloon is

immersed in liquid nitrogen at -196 C, raising the pressure to 5.20 atm. What is the

volume of the balloon in the liquid nitrogen?

Choose one answer.

a. 0.15 L

b. 2.1 L

c. 4.0 L

d. 58 L


Question4Marks: 1

A basketball is inflated to a pressure of 1.50 atm in a 20.0 C garage. What is the

pressure of the basketball outside where the temperature is -5.00 C?

Choose one answer.

a. 1.37 atm

b. 1.42 atm

c. 1.58 atm


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d. 1.64 atm


Question5Marks: 1

The volume of 350. mL of gas at 25 C is decreased to 125 mL at constant pressure.What is the final temperature of the gas?

Choose one answer.

a. -167 C

b. 8.9 C

c. 70 C

d. 561 C


Question6Marks: 1

If the number of moles of gas is doubled at constant temperature and volume, thepressure of the gas

Choose one answer.

a. is halved.

b. is doubled.

c. is quadrupled.

d. remains the same.


Question7Marks: 1


8/9

Three identical flasks contain three different gases at standard temperature andpressure. Flask A contains CH4, flask B contains CO2, flask C contains N2. Which flaskcontains the largest number of molecules?

Choose one answer.

a. flask A

b. flask B

c. flask C

d. All flasks contain the same number of molecules.


Question8Marks: 1

How many grams of O2 gas are there in a 5.00-L cylinder at 4.00 x 103 mm Hg and 23

C?

Choose one answer.

a. 17.3 g

b. 34.7 g

c. 446 g

d. 2.63 x 10 g


Question9Marks: 1

What is the Celsius temperature of 100.0 g of chlorine gas in a 40.0-L container at 800mm Hg?

Choose one answer.

a. -91 C

b. 91 C


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c. 182 C

d. 364 C


Question10Marks: 1

Cyanogen is a gas which contains 46.2% C and 53.8% N by mass. At a temperature of

25 C and a pressure of 750 mm Hg, 1.50 g of cyanogen occupies 0.714 L. What isthe molecular formula of cyanogen?

Choose one answer.

a. CN

b. C2N2

c. C3N4

d. C4N5


Finish review

Lichter CHM1045 Quizzes (5A-5B) (Spring 2012)

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