Chem 2045 Ch 8 HW

There are a total of 24 questions required – 14 shown here and the rest in the back of the book (link at the bottom). Please solve and SHOW ALL WORK.

Thank you. Please contact me ASAP if you have any questions.

Convert 6.159 kPa to mm Hg

Group of answer choices

4.620×106

4.33×105

49.20

46.20

Flag this QuestionQuestion 22 pts

What volume of methane gas, CH4, has the same number of molecules as 10.00 L of helium gas at the same temperature and pressure?

Group of answer choices

20.00L

2.00L

10.00L

50.00L

Flag this QuestionQuestion 31 pts

Which of the following will happen if the temperature of a gas is decreased from 40°C to 20°C at constant pressure?

Group of answer choices

The volume will increase slightly.

The volume will double.

The volume will decrease slightly.

The volume will be halved.

Flag this QuestionQuestion 41 pts

A sample of a gas at 0.750 atm and 100oC occupies 25.0 L. At what pressure (atm) the gas will occupy 10.0 L at the same temperature?

Group of answer choices

333

0.333

1.88

2

Flag this QuestionQuestion 51 pts

What would be the volume (L) of a gas sample at 276oK and 0.979 atm, if it occupies 18.3 L at 328oK and 0.979 atm?

Group of answer choices

12.2

21.7

19.3

15.4

Flag this QuestionQuestion 61.5 pts

The volume of a sample of gas is 950 mL at STP. What volume (L) will the sample occupy at 110oC and 1520 torr?

Group of answer choices

0.666

339

0.339

0.777

Flag this QuestionQuestion 72 pts

The pressure of argon in an incandescent light bulb is 0.55 atm at 82oC. If a 100-watt bulb has a volume of 105 cm3, how many grams of argon is in the bulb?

Group of answer choices

0.19

0.095

0.10

0.15

Flag this QuestionQuestion 82 pts

A 333 g sample of neon is placed into a 3.33 L cylinder, and the cylinder is heated until the gas pressure is 333 atm. What is the gas temperature in oC?

Group of answer choices

819

546

346

656

Flag this QuestionQuestion 91 pts

How many molecules of nitrogen exist in a 250 mL container at 1.5 x 10-3 torr and 1500oC?

Group of answer choices

3.4×10-9

3.4×109

2.0×1015

2.0×1014

2.0×1018

Flag this QuestionQuestion 101.5 pts

What is the density (g/L) of methane (CH4) at 255 torr and 100oC?

Group of answer choices

1.75

0.075

0.35

0.175

Flag this QuestionQuestion 112 pts

For which compound would a 0.200 g sample occupy 213 cm3 at 50oC and 0.825 atm?

Group of answer choices

CH4

C2H4

C2H6

C3H4

Flag this QuestionQuestion 121 pts

According to the kinetic molecular theory, which of the following is not true?

Group of answer choices

The average kinetic energy of gas particles is proportional to the Celsius temperature.

Gas molecules are assumed to have no volume.

all of these is true.

Gas pressure is caused by collisions between gas molecules and the container walls.

Flag this QuestionQuestion 132 pts

What volume (L) of hydrogen at 27oC and 0.951 atm may be prepared by the reaction of11 g of gallium with an excess of hydrochloric acid?
2 Ga(s) + 6 HCl(aq) 2 GaCl3(aq) + 3 H2(g)

Group of answer choices

6.64

3.75

6.12

7.74

Flag this QuestionQuestion 141 pts

A hydrogen gas effuses at a rate of 6.24 mL/s. Calculate the effusion rate in mL/s of carbon dioxide in the same effusion apparatus.

Group of answer choices

3.22

1.33

2.00

0.650

*******************PLEASE DON’T FORGET BELOW*****************************

Click this link to access the book and answer the question numbers below:

https://openstax.org/books/chemistry-atoms-first-2e/pages/1-introduction

Solve the following AFTER-THE-CHAPTER exercises listed below. Show your work where necessary. You do not need to rewrite the questions.

Chapter 8: questions # 15; 25; 32; 45; 52; 59; 66;67;86;94