engineering chemistry MCQ #3384

The density of a gas is 2 g/L at 1 atm and 27°C. The molecular mass is:

engineering chemistry MCQ #3384

  1. Question 1

    Q1. The density of a gas is 2 g/L at 1 atm and 27°C. The molecular mass is:

    • A) 24 g/mol
    • B) 48 g/mol
    • C) 49 g/mol
    • D) 50 g/mol

    Answer: 49 g/mol

    Explanation: Using PV = nRT and density = mass/volume, M = dRT/P = 2 * 0.0821 * 300 / 1 = 49.26 g/mol.