Question

Part A

A mixture of He, Ar, and Xe has a total pressure of 2.20 atm . The partial pressure of He is 0.450 atm , and the partial pressure of Ar is 0.400 atm . What is the partial pressure of Xe? Express your answer to three significant figures and include the appropriate units.

**Part B**

A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2 , and an unknown quantity of He. The temperature of the mixture is 0 ∘C , and the total pressure is 1.00 atm . How many grams of helium are present in the gas mixture? Express your answer to three significant figures and include the appropriate units.

Answer #1

Part A:

Given mixuture of gases has total pressure,

Ptotal=2.20 atm=P(He) + P(Ar) + P(Xe)

Given P(He)=0.45 atm, P(Ar)=0.4 atm, and P(Xe)=?

According to Dalton's law of partial pressures,

P(total)=P(He) + P(Ar) + P(Xe)

2.20 atm=0.45 atm + 0.4 atm + P(Xe)

P(Xe)=2.2 atm - 0.85 atm

P(Xe)=1.35 atm.

Part B:

Given 0.25 mol N2, 0.25 mol O2 and unknown moles of He.

Temperature, T=0°C=273 K, pressure, P=1 atm, volume, V=18 L, gas constant R=0.0821 L atm mol^-1 K^-1.

From Ideal gas equation, PV=nRT

where n=number of moles

n=PV/RT

n=(1 atm x 18 L)/(0.0821 L atm mol^-1 K^-1 x 273 K)

n=0.803 mol.

Total number of moles =n(N2) + n(O2) + n(He)=0.803

n(He) =0.80 3 - 0.25 -0.25 mol=0.303 mol.

Molar mass of He=4g/mol.

Therefore mass of He=moles x molar mass=0.303 mol x 4 g/mol=1.21 g.

Please let me know if you have any doubt. Thanks.

Part A
A mixture of He, Ar, and Xe has a total pressure of 2.90 atm .
The partial pressure of He is 0.450 atm , and the partial pressure
of Ar is 0.250 atm . What is the partial pressure of Xe? Express
your answer to three significant figures and include the
appropriate units.
Part B
A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250
mole O2 , and an unknown quantity of He....

7. A) A mixture of He, Ar, and Xe has a total pressure of 2.70
atm . The partial pressure of He is 0.200 atm , and the partial
pressure of Ar is 0.250 atm . What is the partial pressure of
Xe?
B) A volume of 18.0 L contains a mixture of 0.250 mole N2 ,
0.250 mole O2 , and an unknown quantity of He. The temperature of
the mixture is 0 ∘C , and the total pressure...

A) A mixture of He, Ar, and Xe has a total pressure of 2.80 atm
. The partial pressure of He is 0.400 atm , and the partial
pressure of Ar is 0.300 atm . What is the partial pressure of
Xe?
B) A volume of 18.0 L contains a mixture of 0.250 mole N2 ,
0.250 mole O2 , and an unknown quantity of He. The temperature of
the mixture is 0 ∘C , and the total pressure is...

In a mixture of He, Ne, and Xe gases with a total pressure of
925 atm, if there is 10.5 g of each gas in the mixture, what is the
partial pressure of Xe?

A mixture of He, N2, and Ar has a pressure of 24.5 atm at 28.0
°C. If the partial pressure of He is 2671 torr and that of Ar is
3345 mm Hg, what is the partial pressure of N2?

A mixture of helium, nitrogen, and oxygen has a total pressure
of 759 mmHg . The partial pressures of helium and nitrogen are 233
mmHg and 200 mmHg , respectively.
1. What is the partial pressure of oxygen in the mixture? PO2 =
______ mmHg
2. What volume of O2 at 988 mmHg and 21 ∘C is required to
synthesize 19.0 mol of NO?
Express your answer to three significant figures and include the
appropriate units. volume of O2 =...

A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250
mole O2 , and an unknown quantity of He. The temperature of the
mixture is 0 ∘C , and the total pressure is 1.00 atm . How many
grams of helium are present in the gas mixture?

A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250
mole O2 , and an unknown quantity of He. The temperature of the
mixture is 0 ∘C , and the total pressure is 1.00 atm . How many
grams of helium are present in the gas mixture?

A mixture of gas contains 0.215g Ar and 1.95g Xe and has a total
pressure of 2.33atm. What are the partial pressures of each
gas?

A mixture of three gases (Ar, Ne, and CO2) has a total pressure
of 1.2 atm. If the mixture of gases is composed of 25.0 g of each
gas, what is the partial pressure of Ne?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 4 minutes ago

asked 13 minutes ago

asked 42 minutes ago

asked 43 minutes ago

asked 49 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 3 hours ago