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I believe this is correct, so hopefully this helps....
68 kg is = 68,000 g. now take the substance you are dealing with a find it's molecular formula (the weight of each element in the formula). Divide 68,000g by the molecule weight (you just calculated). you now have the number of moles. 1 mole = 6.022X10^23 molecules/atoms... according to Avogadro's law.
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∙ 13y ago
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