Question #b1f48

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Question #b1f48

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Answer 1 · 2015-04-11T20:17:59

Very easy. If you have a given mass here is how you calculate the number of atoms:

$n = \frac{m}{M}$ $n=m/M$

$n = \frac{N}{L}$ $n=N/L$

$m$ $m$ - mass (g)
$M$ $M$ - molar mass (g/(mole)
$n$ $n$ - amount of substance (mole)
$N$ $N$ - number (of atoms for example)
$L$ $L$ - Avogadro's number $6.022 \times 10^{23}$ $6.022 xx 10^23$

More about the theory behind read [here.](http://en.wikipedia.org/wiki/Amount_of_substance)

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