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**1. Homework Statement**

Find the 1/12 of the mass of the atom of [tex]\stackrel{12}{6}C[/tex] in kilograms.

**2. Homework Equations**

[tex]n=\frac{m}{M}[/tex]

**3. The Attempt at a Solution**

How I will do this? I have the answer [tex]\frac{1}{1000N_A}kg[/tex], but don't know where it come from...