A Gas Mixture Consists of N₂,O₂,and Ne,where the Mole Fraction

question 109

Multiple Choice

A gas mixture consists of N₂,O₂,and Ne,where the mole fraction of N₂ is 0.55 and the mole fraction of Ne is 0.25.If the mixture is at STP in a 5.0 L container,how many molecules of O₂ are present?

• A)4.5 × 10²² molecules O₂
• B)2.7 × 10²² molecules O₂
• C)3.7 × 10²³ molecules O₂
• D)1.1 × 10²³ molecules O₂
• E)9.3 × 10²⁴ molecules O₂

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