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Some Basic Concepts of Chemistry
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What is the correct formula for calculating the hardness of water in ppm?
A. (Mass of MgCO₃ / Mass of water) × 10⁶
B. (Mass of CaSO₄ / Mass of water) × 10⁶
C. (Mass of CaCO₃ / Mass of water) × 10⁶
D. (Mass of MgSO₄ / Mass of water) × 10⁶
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