Posted by robyn on Monday, May 7, 2012 at 11:27pm.
7.1E25/6.02E23 = ? mols C atoms
?mols C atoms x (1 mol IBu/13 C atoms) x (206 g/mol) = ? and round. I would round to 1900 (1870 has four s.f. in it and you're allowed only 2 from the 7.1).
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