1 - Weebly

relative atomic masses are Ca=40, H=1 and O=16 . Mr = 40 + 2 x (16+1) = 74 . 12.3. Conservation of mass calculations. When elements and compounds react to form new products, mass cannot be lost or gained - "The Law of Conservation of Mass" - states that . mass cannot be created or destroyed, but changed into different forms, so in a chemical change ................
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