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posted by DeAnna Tuesday, February 5, 2013 at 5:57pm.
If you are given a sample containg 1.204 x 10 24 molecules of NaCl, what is its weight in grams?
since 1 mole has 6.02*10^23 molecules, and mass of 58.45g, you have 12.04/6.02 * 58.45 = 116.9 g that's 2 moles
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