GKFix MCQ Question

What is the correct expression for molality (m)?

• A. m = (w2 × M2) / (w1 / 1000)
• B. m = (w2 / M2) / (w1 / 1000)
• C. m = (w1 / M2) / (w2 / 1000)
• D. m = (w2 / M2) × (w1 / 1000)