GKFix MCQ Question

How is the percentage of phosphorus calculated when using Mg₂P₂O₇?

• A. (222 × m × 100)/(62 × m₁)
• B. (62 × mass of Mg₂P₂O₇ × 100)/(222 × mass of compound)
• C. (62 × m × 100)/(222 × m₁)
• D. (222 × m₁ × 100)/(62 × m)