Question 1

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N2 at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Accepted Answer

A)  0.59 atm 
B)  1.1 atm 
C)  1.7 atm 
D)  1.9 atm 
E)  3.8 atm

Question 2

Give the gas that is the lowest percent by volume in dry gas.

Accepted Answer

A)  CO2 
B)  Ar 
C)  N2 
D)  Na 
E)  Ag

Question 3

A syringe contains 0.65 moles of He gas that occupy 900.0 mL.What volume (in L)of gas will the syringe hold if 0.35 moles of Ne is added?

Accepted Answer

A)  0.48 L 
B)  1.7 L 
C)  1.4 L 
D)  2.6 L 
E)  0.80 L

Question 4

Determine the total volume of all gases (at STP)formed when 50.0 mL of TNT (C3H5(NO3)3,d = 1.60 g/mL,molar mass = 227.10 g/mol)reacts according to the following reaction. 4 C3H5(NO3)3(l)→ 6 N2(g)+ O2(g)+ 12 CO2(g)+ 10 H2O(g)

Accepted Answer

A)  4.93 L 
B)  57.2 L 
C)  29.6 L 
D)  448 L 
E)  175 L

Question 5

How many mL of O2 gas at 25°C and 755 mm Hg pressure can be produced from the thermal decomposition of 0.500 grams of KClO3(s)according to the chemical equation shown below? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

Accepted Answer

A)  50.2 mL 
B)  67.0 mL 
C)  151 mL 
D)  302 mL

Question 6

What is the average speed (actually the root-mean-square speed)of a argon atom at 27°C?

Accepted Answer

A)  4.11 m/s 
B)  13.7 m/s 
C)  130 m/s 
D)  433 m/s

Question 7

The rate of effusion of two different gases is known as

Accepted Answer

A)  Avogadro's Law. 
B)  Graham's Law. 
C)  Charles's Law. 
D)  Boyle's Law. 
E)  Dalton's Law.

Question 8

Define pressure.

Accepted Answer

A)  force used to compress a gas 
B)  force applied to a gas to condense it 
C)  force exerted per unit area by gas particles as they strike the surfaces around them 
D)  force exerted by solids to the surrounding area 
E)  force used to melt a solid

Question 9

Convert 2.00 atm to torr.

Accepted Answer

A)  760 torr 
B)  575 torr 
C)  1520 torr 
D)  1000 torr 
E)  2400 torr

Question 10

Which of the following samples will have the greatest volume at STP?

Accepted Answer

A)  22 g Ne 
B)  22 g He 
C)  22 g O2 
D)  22 g Cl2 
E)  All of these samples would have the same volume at STP.

Question 11

How many grams of zinc metal are required to produce 4.00 liters of hydrogen gas at STP according to the chemical equation shown below? Zn(s)+ 2 HCl(aq)→ ZnCl2(aq)+ H2(g)

Accepted Answer

A)  0.0856 g 
B)  11.7 g 
C)  23.4 g 
D)  262 g

Question 12

What is the density of oxygen gas at STP?

Accepted Answer

A)  0.700 g/L 
B)  0.0450 g/L 
C)  2.90 g/L 
D)  1.43 g/L

Question 13

What mass of NO2 is contained in a 13.0 L tank at 4.58 atm and 385 K?

Accepted Answer

A)  18.8 g 
B)  53.1 g 
C)  24.4 g 
D)  86.7 g 
E)  69.2 g

Question 14

Which of the following gases has the highest average speed at 400K?

Accepted Answer

A)  NO2 
B)  O2   
C)  F2 
D)  Cl2

Question 15

A sample of air from a home is found to contain 4.3 × 10-6 of carbon monoxide.This means that if the total pressure is 735 torr,then the partial pressure of CO is ________ torr.

Accepted Answer

A)  3.2 ×  
B)  3.2 ×  
C)  3.2 
D)  5.9 × 103 
E)  1.7 × 108

Question 16

Calculate the ratio of effusion rates of Cl2 to F2.

Accepted Answer

A)  51.9 
B)  0.535 
C)  1.87 
D)  1.37 
E)  0.732

Question 17

Determine the mass of water formed when 12.5 L NH3 (at 298 K and 1.50 atm)is reacted with 18.9 L of O2 (at 323 K and 1.1 atm). 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(g)

Accepted Answer

A)  17.0 g H2O 
B)  20.7 g H2O 
C)  37.7 g H2O 
D)  13.8 g H2O 
E)  27.9 g H2O

Question 18

A steel bottle contains nitrogen gas at STP.What is the final pressure if the temperature is changed to 155°C?

Accepted Answer

A)  0.638 atm 
B)  0.696 atm 
C)  1.44 atm 
D)  1.57 atm 
E)  2.20 atom

Question 19

Given three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -10°C,cylinder B is at -5°F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?

Accepted Answer

A)  cylinder A 
B)  cylinder B 
C)  cylinder C 
D)  All cylinders contain the same mass of O2.

Question 20

The volume of a gas is proportional to the temperature of a gas is known as

Accepted Answer

A)  Avogadro's Law. 
B)  Ideal Gas Law. 
C)  Charles's Law. 
D)  Boyle's Law. 
E)  Dalton's Law.

Exam 5: Gases

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N₂ at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Give the gas that is the lowest percent by volume in dry gas.

A syringe contains 0.65 moles of He gas that occupy 900.0 mL.What volume (in L) of gas will the syringe hold if 0.35 moles of Ne is added?

Determine the total volume of all gases (at STP) formed when 50.0 mL of TNT (C₃H₅(NO₃) ₃,d = 1.60 g/mL,molar mass = 227.10 g/mol) reacts according to the following reaction. 4 C₃H₅(NO₃) ₃(l) → 6 N₂(g) + O₂(g) + 12 CO₂(g) + 10 H₂O(g)

How many mL of O₂ gas at 25°C and 755 mm Hg pressure can be produced from the thermal decomposition of 0.500 grams of KClO₃(s) according to the chemical equation shown below? 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

What is the average speed (actually the root-mean-square speed) of a argon atom at 27°C?

The rate of effusion of two different gases is known as

Define pressure.

Convert 2.00 atm to torr.

Which of the following samples will have the greatest volume at STP?

How many grams of zinc metal are required to produce 4.00 liters of hydrogen gas at STP according to the chemical equation shown below? Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)

What is the density of oxygen gas at STP?

What mass of NO₂ is contained in a 13.0 L tank at 4.58 atm and 385 K?

Which of the following gases has the highest average speed at 400K?

A sample of air from a home is found to contain 4.3 × 10^-6 of carbon monoxide.This means that if the total pressure is 735 torr,then the partial pressure of CO is ________ torr.

Calculate the ratio of effusion rates of Cl₂ to F₂.

Determine the mass of water formed when 12.5 L NH₃ (at 298 K and 1.50 atm) is reacted with 18.9 L of O₂ (at 323 K and 1.1 atm) . 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

A steel bottle contains nitrogen gas at STP.What is the final pressure if the temperature is changed to 155°C?

Given three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -10°C,cylinder B is at -5°F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?

The volume of a gas is proportional to the temperature of a gas is known as

Exam 5: Gases

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N2 at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Give the gas that is the lowest percent by volume in dry gas.

A syringe contains 0.65 moles of He gas that occupy 900.0 mL.What volume (in L) of gas will the syringe hold if 0.35 moles of Ne is added?

Determine the total volume of all gases (at STP) formed when 50.0 mL of TNT (C3H5(NO3) 3,d = 1.60 g/mL,molar mass = 227.10 g/mol) reacts according to the following reaction. 4 C3H5(NO3) 3(l) → 6 N2(g) + O2(g) + 12 CO2(g) + 10 H2O(g)

How many mL of O2 gas at 25°C and 755 mm Hg pressure can be produced from the thermal decomposition of 0.500 grams of KClO3(s) according to the chemical equation shown below? 2 KClO3(s) → 2 KCl(s) + 3 O2(g)

What is the average speed (actually the root-mean-square speed) of a argon atom at 27°C?

The rate of effusion of two different gases is known as

Define pressure.

Convert 2.00 atm to torr.

Which of the following samples will have the greatest volume at STP?

How many grams of zinc metal are required to produce 4.00 liters of hydrogen gas at STP according to the chemical equation shown below? Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)

What is the density of oxygen gas at STP?

What mass of NO2 is contained in a 13.0 L tank at 4.58 atm and 385 K?

Which of the following gases has the highest average speed at 400K?

A sample of air from a home is found to contain 4.3 × 10-6 of carbon monoxide.This means that if the total pressure is 735 torr,then the partial pressure of CO is ________ torr.

Calculate the ratio of effusion rates of Cl2 to F2.

Determine the mass of water formed when 12.5 L NH3 (at 298 K and 1.50 atm) is reacted with 18.9 L of O2 (at 323 K and 1.1 atm) . 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

A steel bottle contains nitrogen gas at STP.What is the final pressure if the temperature is changed to 155°C?

Given three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -10°C,cylinder B is at -5°F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?

The volume of a gas is proportional to the temperature of a gas is known as

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N₂ at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Determine the total volume of all gases (at STP) formed when 50.0 mL of TNT (C₃H₅(NO₃) ₃,d = 1.60 g/mL,molar mass = 227.10 g/mol) reacts according to the following reaction. 4 C₃H₅(NO₃) ₃(l) → 6 N₂(g) + O₂(g) + 12 CO₂(g) + 10 H₂O(g)

How many mL of O₂ gas at 25°C and 755 mm Hg pressure can be produced from the thermal decomposition of 0.500 grams of KClO₃(s) according to the chemical equation shown below? 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

How many grams of zinc metal are required to produce 4.00 liters of hydrogen gas at STP according to the chemical equation shown below? Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)

What mass of NO₂ is contained in a 13.0 L tank at 4.58 atm and 385 K?

A sample of air from a home is found to contain 4.3 × 10^-6 of carbon monoxide.This means that if the total pressure is 735 torr,then the partial pressure of CO is ________ torr.

Calculate the ratio of effusion rates of Cl₂ to F₂.

Determine the mass of water formed when 12.5 L NH₃ (at 298 K and 1.50 atm) is reacted with 18.9 L of O₂ (at 323 K and 1.1 atm) . 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

Given three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -10°C,cylinder B is at -5°F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?