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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?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Item 2 2 of 16 Learning Goal: I Review I Constants I Periodic Table To use partial pressure in gas law calculations. partial pressure of Ar is 0.400 atm . What is the partial pressure of Xe? In a mixture of gases, the total pressure of the gas mixture is equal to the sum of the partial pressures of the individual Express your answer to three significant figures and include the appropriate units. gases. For example, if you have a mixture of • View Available Hint(s) helium at 2 atm and argon at 4 atm , then the total pressure of the gas inside the cylinder is 6 atm . (Figure 1) Similarly, if you know the total pressure of a gas mixture, you can use the number of moles to find the partial pressures, or the partial pressures to find the number of moles. HẢ ? Pxe Value Units Example Problem: A mixture of N2, O2, and He gases has a total pressure of 1 atm . The partial pressures of N, and O, are 0.7 atm and 0.25 atm, respectively. Figure 1 of 1 Part B 7. 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? 3. 3. Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HÀ mass of He = Value Units II
Transcribed Image Text:Item 2 2 of 16 Learning Goal: I Review I Constants I Periodic Table To use partial pressure in gas law calculations. partial pressure of Ar is 0.400 atm . What is the partial pressure of Xe? In a mixture of gases, the total pressure of the gas mixture is equal to the sum of the partial pressures of the individual Express your answer to three significant figures and include the appropriate units. gases. For example, if you have a mixture of • View Available Hint(s) helium at 2 atm and argon at 4 atm , then the total pressure of the gas inside the cylinder is 6 atm . (Figure 1) Similarly, if you know the total pressure of a gas mixture, you can use the number of moles to find the partial pressures, or the partial pressures to find the number of moles. HẢ ? Pxe Value Units Example Problem: A mixture of N2, O2, and He gases has a total pressure of 1 atm . The partial pressures of N, and O, are 0.7 atm and 0.25 atm, respectively. Figure 1 of 1 Part B 7. 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? 3. 3. Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HÀ mass of He = Value Units II
Item 2 2 of 16 moles. I Review I Constants I Periodic Table Example Problem: A mixture of N2, O2, and He gases has a total pressure of 1 atm . The partial pressures of N2 and O2 are 0.7 atm and 0.25 atm , respectively. What is the partial pressure of He? The sum of the partial pressures is equal to the total 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. • View Available Hint(s) pressure: Ptotal = PN, + Po, + PHe Rearranging this equation, the partial pressure of He is PHe Protal – PN, – Po, Pxe Value Units 1.00 atm – 0.70 atm – 0.25 atm 0.05 atm Figure 1 of 1 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? 2. Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HÀ ? mass of He: Value Units %3D
Transcribed Image Text:Item 2 2 of 16 moles. I Review I Constants I Periodic Table Example Problem: A mixture of N2, O2, and He gases has a total pressure of 1 atm . The partial pressures of N2 and O2 are 0.7 atm and 0.25 atm , respectively. What is the partial pressure of He? The sum of the partial pressures is equal to the total 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. • View Available Hint(s) pressure: Ptotal = PN, + Po, + PHe Rearranging this equation, the partial pressure of He is PHe Protal – PN, – Po, Pxe Value Units 1.00 atm – 0.70 atm – 0.25 atm 0.05 atm Figure 1 of 1 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? 2. Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HÀ ? mass of He: Value Units %3D
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