engineering chemistry MCQ #3095

A air sample has a CO concentration of 10 ppm. What is its concentration in mg/m³?

engineering chemistry MCQ #3095

  1. Question 1

    Q1. A air sample has a CO concentration of 10 ppm. What is its concentration in mg/m³?

    • A) 10 mg/m³
    • B) 20 mg/m³
    • C) 12 mg/m³
    • D) 15 mg/m³

    Answer: 12 mg/m³

    Explanation: 1 ppm CO = 1.25 mg/m³ (using molecular weight and ideal gas law), so 10 ppm = 12.5 mg/m³, approximately.