1. Calculate the volume of 3.3 moles of gas with a pressure of 950 mmHg and temp

Question

1. Calculate the volume of 3.3 moles of gas with a pressure of 950 mmHg and temperature of 25 °C.

5.4 L

0.02 L

11.8 L

64.6 L

2. What is the temperature of 5.2 moles of gas in a 40 L container with a pressure of 4.5 atm?
      
237 °C
      
422 °C
      
149 °C
      
273 °C

3. Calculate the number of moles of gas with a volume of 70 L at a temperature of 65 °C and pressure of 2.4 atm.

6.05 moles

3.15 moles

1.65 moles

3.30 moles

5.4 L

0.02 L

11.8 L

64.6 L

2. What is the temperature of 5.2 moles of gas in a 40 L container with a pressure of 4.5 atm?
      
237 °C
      
422 °C
      
149 °C
      
273 °C

3. Calculate the number of moles of gas with a volume of 70 L at a temperature of 65 °C and pressure of 2.4 atm.

6.05 moles

3.15 moles

1.65 moles

3.30 moles

Explanation / Answer

1)

Given:

P= 950.0 mm Hg = (950.0/760) atm = 1.250 atm

n = 3.3 mol

T= 25.0 oC = (25.0+273) K = 298.000 K

use:

P * V = n*R*T

1.250 atm * Vi = 3.3 mol* 0.0821 atm.L/mol.K * 298.0 K

V = 64.6 L

Answer: 64.6 L

2)

Given:

P = 4.5 atm

V = 40 L

n = 5.2 mol

use:

P * V = n*R*T

4.5 atm * 40 L = 5.2 mol* 0.0821 atm.L/mol.K * T

T = 422 K

= (422 - 273) oC

= 149 oC

Answer: 149 oC

3)

Given:

P = 2.4 atm

V = 70 L

T= 65.0 oC = (65.0+273) K = 338.000 K

use:

P * V = n*R*T

2.4 atm * 70 L = n * 0.0821 atm.L/mol.K * 338.0 K

n = 6.05 mol

Answer: 6.05 mol

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