MDCAT Chemistry MCQ #2818

A 15.0 g sample of NaNO₃ is dissolved in 500. g of water. What is the solution’s concentration in ppm?

MDCAT Chemistry MCQ #2818

  1. Question 1

    Q1. A 15.0 g sample of NaNO₃ is dissolved in 500. g of water. What is the solution’s concentration in ppm?

    • A) 30 ppm
    • B) 300 ppm
    • C) 6000 ppm
    • D) 150 ppm

    Answer: 30 ppm

    Explanation: ppm = (15.0/515.0)×10⁶ ≈ 30 ppm. B assumes 500 g instead of 515 g total.