MISSED THIS? Watch KCV: Mixtures of Gases and Partial Pressures, IWE: Partial Pressures and Mole Fractions; Read Section 6.6. You can click on the Review link to access the section in your eText. Composition of Dry Air Gas Percent by Volume (%) Nitrogen (N₂) Oxygen (O₂) Argon (Ar) Carbon dioxide (CO₂) 0.04 78 21 0.9 ▼ Part A What is the mole fraction of oxygen gas in air? (See table for the composition of dry air.) Express the fraction to two significant figures. X = 0.21 Submit ✔ Correct According to Avogadro's law the amount and the volume are directly proportional, so the mole fraction equals the volume fraction. The volume percent of oxygen in air is 21% (see the table below); therefore, the mole fraction is 0.21. Part B Previous Answers Vair 13 = Gas Nitrogen (N₂) Oxygen (O₂) Argon (Ar) Carbon dioxide (CO₂) Percent by volume (%) www. ? 78 21 0.9 What volume of air contains 17.6 g of oxygen gas at 273 K and 1.00 atm? Express your answer using two significant figures. 195] ΑΣΦ 0.04 L
MISSED THIS? Watch KCV: Mixtures of Gases and Partial Pressures, IWE: Partial Pressures and Mole Fractions; Read Section 6.6. You can click on the Review link to access the section in your eText. Composition of Dry Air Gas Percent by Volume (%) Nitrogen (N₂) Oxygen (O₂) Argon (Ar) Carbon dioxide (CO₂) 0.04 78 21 0.9 ▼ Part A What is the mole fraction of oxygen gas in air? (See table for the composition of dry air.) Express the fraction to two significant figures. X = 0.21 Submit ✔ Correct According to Avogadro's law the amount and the volume are directly proportional, so the mole fraction equals the volume fraction. The volume percent of oxygen in air is 21% (see the table below); therefore, the mole fraction is 0.21. Part B Previous Answers Vair 13 = Gas Nitrogen (N₂) Oxygen (O₂) Argon (Ar) Carbon dioxide (CO₂) Percent by volume (%) www. ? 78 21 0.9 What volume of air contains 17.6 g of oxygen gas at 273 K and 1.00 atm? Express your answer using two significant figures. 195] ΑΣΦ 0.04 L
Chapter5: Gases
Section: Chapter Questions
Problem 155CP
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