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Hi, how what equations do I use to find the following : a) mass of NaCl used b) mass of NaCl solution c)percentage mass of NaCl in solution This is the info : Mass of beaker+stirring rod= 78.4205g Mass of beaker+stirring rod+NaCl=80.9205g Mass of beaker + stirring rod + NaCl + water = 140.4490g Mass of...

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  1. Roger the Mole
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    a)
    80.9205g - 78.4205g = 2.5000 g NaCl

    b)
    140.4490g - 78.4205g = 62.0285 g NaCl + water [note: NOT 52.0285g]

    c)
    (2.5000 g NaCl) / (62.0285 g solution) = 0.040304 = 4.0304% NaCl

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