How Many Molecules of N₂ Gas Are Present in a 2.5-L

question 69

Multiple Choice

How many molecules of N₂ gas are present in a 2.5-L flask at 50°C and 650 mmHg? (R = 0.08206 L • atm/K • mol, 1 atm = 760 mmHg, 1 mole = 6.022 × 10²³ molecules)

• A) 2.1 × 10^-23 molecules
• B) 4.9 × 10²² molecules
• C) 3.1 × 10²³ molecules
• D) 3.6 × 10²⁵ molecules
• E) 0.081 molecules

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