Questions: Question 13 6.67 pts In the diagram below, helium atoms are represented by unshaded spheres, neon atoms by gray spheres, and argon atoms by black spheres. If the total pressure in the container is 900 mm Hg , what is the partial pressure of helium? 450 mm Hg 270 mm Hg 90 mm Hg 180 mm Hg

Question 13 6.67 pts In the diagram below, helium atoms are represented by unshaded spheres, neon atoms by gray spheres, and argon atoms by black spheres. If the total pressure in the container is 900 mm Hg , what is the partial pressure of helium? 450 mm Hg 270 mm Hg 90 mm Hg 180 mm Hg
Transcript text: Question 13 6.67 pts In the diagram below, helium atoms are represented by unshaded spheres, neon atoms by gray spheres, and argon atoms by black spheres. If the total pressure in the container is 900 mm Hg , what is the partial pressure of helium? 450 mm Hg 270 mm Hg 90 mm Hg 180 mm Hg
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Solution

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Solution Steps

Step 1: Count the number of helium atoms

There are 3 unshaded (helium) atoms.

Step 2: Count the total number of atoms

There are 3 unshaded (helium) + 2 gray (neon) + 2 black (argon) = 7 total atoms.

Step 3: Calculate the mole fraction of helium

Mole fraction of helium = (Number of helium atoms) / (Total number of atoms) = 3/7

Step 4: Calculate the partial pressure of helium

Partial pressure of helium = (Mole fraction of helium) * (Total pressure) Partial pressure of helium = (3/7) * 900 mm Hg = 270 mm Hg

Final Answer: The final answer is $\boxed{270 mm Hg}$

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