A 42-L Flask of Ideal Neon Gas (Which Is Monatomic)is at at a Pressure

question 36

Multiple Choice

A 4.2-L flask of ideal neon gas (which is monatomic) is at a pressure of 3.3 atm and a temperature of 450 K.The atomic mass of neon is 20.2 g/mol.How many neon atoms are in the flask? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa,N_A = 6.022 × 10²³ molecules/mol)

• A)2.3 × 10²³
• B)2.3 × 10²²
• C)6.9 × 10²³
• D)2.3 × 10²⁵
• E)6.9 × 10²²

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