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  1. Does 1 C atom mean 1 single C atom out of Avogadro's number of C atoms = 1 single C atom out of 6.023 X 10^23 numbers of C atoms?
  2. Does 1 mole of C atoms mean Avogadro's number of C atoms = 6.023 X 10^23 numbers of C atoms?

I am confused. Could you clarify it, please?

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closed as unclear what you're asking by Mithoron, aventurin, M.A.R., Pritt Balagopal, Tyberius Apr 16 '18 at 2:36

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Clarify what? 2) is exactly what the definition says and no idea what 1) is supposed to be, 1 atom is one atom, that's it. $\endgroup$ – Mithoron Apr 15 '18 at 17:03
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    $\begingroup$ What is the difference between 1 grain of sand and 1 tonne of grains of sand? Does the former mean 1 grain of sand out of 10^9 numbers of grains of sand? $\endgroup$ – immibis Apr 15 '18 at 22:58
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What is the difference between one egg and one dozen eggs? A dozen is simply a certain count, in this case 12, that is rendered as one unit for our convenience. Avogadro's number s just the same thing as a dozen, except we made the unit count larger than 12 in order to match it up with our conventionally used units.

Your assumptions about a "mole" are thus correct.

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    $\begingroup$ This sounds more like a badly-worded notation question to me. $\endgroup$ – Joshua Apr 15 '18 at 19:41
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1 C atom is just one particle of the unique element Carbon. There is virtually no way to isolate or work with a single atom of anything.

1 mole of C is a quantity, like a dozen or a gross. We use dozens for food sale, like eggs, and a gross for small items like pencils. The power of the quantity a 'mole' comes from the mass of a mole in grams. When you have 6.02 x 10^23 particles, you have the formula mass in grams.

1 dozen eggs will weigh differently than 1 dozen bicycles.

Likewise, i mole of any substance will have a mass equal to the species atomic mass, or formula mass.

So, 1 mole of Carbon will have a mass of about 12.01 g (the number written will depend on the periodic table). 1 Mole of water will have a mass of 18 g (approx)

This is why the mole is such a useful quantity.

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