Interpreting and propagating the uncertainty of the standard atomic weights

What is it about?

Interpreting the meaning of the uncertainty associated with the atomic weights, explaining how the atomic weights may be computed given isotopic delta values and isotopic abundances, and how molecular weights and the associated uncertainties may be evaluated.

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Why is it important?

Explains how standard atomic weights expressed as intervals may be used in calculations of derivative quantities, including molecular weights, and how the associated uncertainties may be evaluated. Illustrates how the uncertainty of isotopic delta values may be propagated to the atomic weights. Provides concrete examples of such calculations.