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

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