What is the volume of 28.0 g of nitrogen gas at STP?

What is the volume of 28.0 g of nitrogen gas at STP?

A) 33.6 L
B) 11.2 L
C) 22.4 L
D) 44.8 L
E) none of the above

Answer: C

What is the pressure of a 1.0 L flask containing 0.60 g of He at 25°C? (R= 0.0821 L atm/ mol K)

What is the pressure of a 1.0 L flask containing 0.60 g of He at 25°C? (R= 0.0821 L atm/ mol K)

A) 98 atm
B) 3.7 atm
C) 7.3 atm
D) 15 atm
E) none of the above

Answer: B

What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836 mm Hg at 25.0°C in a 2.00 L flask? (R= 0.0821 L atm/ mol K)

What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836 mm Hg at 25.0°C in a 2.00 L flask? (R= 0.0821 L atm/ mol K)

A) 243 amu
B) 1.89 amu
C) 234 amu
D) 11.1 amu
E) none of the above

Answer: C

What is the volume (in liters) of 1.00 mole of krypton gas that has a pressure of 1140 mm Hg and a temperature of 25.0°C? (R= 0.0821 L atm/ mol K)

What is the volume (in liters) of 1.00 mole of krypton gas that has a pressure of 1140 mm Hg and a temperature of 25.0°C? (R= 0.0821 L atm/ mol K)

A) 1.37
B) 16.3
C) 0.0215
D) 0.00180
E) none of the above

Answer: B

If the number of moles of a gas initially contained in a 2.10 L vessel is doubled, what is the final volume of the gas in liters? (Assume the pressure and temperature remain constant.)

If the number of moles of a gas initially contained in a 2.10 L vessel is doubled, what is the final volume of the gas in liters? (Assume the pressure and temperature remain constant.)

A) 6.30
B) 1.05
C) 4.20
D) 8.40
E) none of the above

Answer: C

A rigid cylinder contains 2.00 liters of gas at a temperature of 25°C. If the pressure of this gas is changed from 0.500 atmospheres to 1.50 atmospheres, what will be the new temperature (in Kelvin, reported to three significant figures) of the gas? (The volume is constant.)

A rigid cylinder contains 2.00 liters of gas at a temperature of 25°C. If the pressure of this gas is changed from 0.500 atmospheres to 1.50 atmospheres, what will be the new temperature (in Kelvin, reported to three significant figures) of the gas? (The volume is constant.)

A) 99.3 K
B) 75.0 K
C) 8.33 K
D) 894 K
E) none of the above

Answer: D

What is the final pressure (expressed in atm) of a 3.05 L system initially at 724 mm Hg and 298 K, that is compressed to a final volume of 2.51 L at 273K?

What is the final pressure (expressed in atm) of a 3.05 L system initially at 724 mm Hg and 298 K, that is compressed to a final volume of 2.51 L at 273K?

A) 1.06
B) 1.60
C) 806
D) 860
E) none of the above

Answer: A

What is the final volume (L) of a 1.00 L system at 315 K and 1.10 atm if STP conditions are established?

What is the final volume (L) of a 1.00 L system at 315 K and 1.10 atm if STP conditions are established?

A) 1.05
B) 0.935
C) 1.50
D) 0.953
E) none of the above

Answer: D

What is the change in temperature of a 2.50 L system when its volume is reduced to 1.75 L if the initial temperature was 298 K?

What is the change in temperature of a 2.50 L system when its volume is reduced to 1.75 L if the initial temperature was 298 K? 

A) 209 K
B) 290 K
C) -89 K
D) -98 K
E) none of the above

Answer: C

What is the final volume of a gas that initially occupies 2.50 L at 298 K and is subsequently heated to 321 K?

What is the final volume of a gas that initially occupies 2.50 L at 298 K and is subsequently heated to 321 K?

A) 2.69 L
B) 2.96 L
C) 2.23 L
D) 2.32 L
E) none of the above

Answer: A

What is the final volume (L) of a 10.0 L system that has the pressure quartered?

What is the final volume (L) of a 10.0 L system that has the pressure quartered?

A) 0.250
B) 17.1
C) 2.50
D) 40.0
E) none of the above

Answer: D

What is the final pressure of a system (atm) that has the volume increased from 0.75 L to 1.1 L with an initial pressure of 1.25 atm?

What is the final pressure of a system (atm) that has the volume increased from 0.75 L to 1.1 L with an initial pressure of 1.25 atm?

A) 1.1
B) 0.85
C) 1.8
D) 1.2
E) none of the above

Answer: B

What is the pressure of 760 mm Hg when expressed in units of in Hg?

What is the pressure of 760 mm Hg when expressed in units of in Hg?

A) 29.92 in Hg
B) 101,325 in Hg
C) 760 in Hg
D) 1 in Hg
E) none of the above

Answer: A

How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g)?

How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g)?

Given CH4 (g) + 2O2 (g) ? CO2 (g) + H2O (g)



A) 28.0 L
B) 56.0 L
C) 84.0 L
D) 112. L
E) none of the above

Answer: D

Water can be formed according to the equation 2H2 (g) + O2 (g) ? 2H2O (g) If 8.0 L of hydrogen is reacted at STP, exactly how many liters of oxygen at STP would be needed to allow complete reaction?

Water can be formed according to the equation
2H2 (g) + O2 (g) ? 2H2O (g)
If 8.0 L of hydrogen is reacted at STP, exactly how many liters of oxygen at STP would be needed to allow complete reaction?

A) 4.0 L
B) 2.0 L
C) 1.0 L
D) 8.0 L
E) none of the above

Answer: A

If 15.0 L of nitrogen is formed at STP, how many liters of hydrogen will be produced (also measured at STP)?

Ammonia gas decomposes according to the equation
2NH3(g) ? N2(g) + 3H2(g)

If 15.0 L of nitrogen is formed at STP, how many liters of hydrogen will be produced (also measured at STP)?

A) 15.0 L
B) 30.0 L
C) 45.0 L
D) 90.0 L
E) not enough information

Answer: C

Suppose you had a balloon containing 1 mole of helium at STP and a balloon containing 1 mole of oxygen at STP. Which statement is TRUE?

Suppose you had a balloon containing 1 mole of helium at STP and a balloon containing 1 mole of oxygen at STP. Which statement is TRUE?

A) The balloons will have the same volume.
B) The balloons will have the same mass.
C) Both A) and B) are true.
D) Neither A) nor B) are true.
E) not enough information

Answer: A

At STP, 12.69 g of a noble gas occupies 14.09 L. What is the identity of the noble gas? (R= 0.0821 L atm/ mol K)

At STP, 12.69 g of a noble gas occupies 14.09 L. What is the identity of the noble gas?
(R= 0.0821 L atm/ mol K)

A) He
B) Ne
C) Ar
D) Kr
E) not enough information

Answer: B

Which set of conditions reflect STP?

Which set of conditions reflect STP?

A) 298 K, 1 atm
B) 25°C, 14.7 psi
C) 373 K, 760 torr
D) 273 K, 1 Pa
E) 273 K, 760 mm Hg

Answer: E

Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume) mixture of gas that had a total volume of 22.4 liters at STP. This gas sample is composed of

Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume) mixture of gas that had a total volume of 22.4 liters at STP. This gas sample is composed of

A) 1 mole of nitrogen and 1 mole of oxygen.
B) 0.5 mole of nitrogen and 0.5 mole of oxygen.
C) 50 mole of nitrogen and 50 mole of oxygen.
D) 28 mole of nitrogen and 32 mole of oxygen.
E) none of the above

Answer: B