**Calculate % mass N:**

$\mathbf{\%}\mathbf{\hspace{0.17em}}\mathbf{N}\mathbf{=}\frac{\mathbf{14}\mathbf{.}\mathbf{01}\mathbf{}\overline{){\displaystyle \raisebox{1ex}{$\mathbf{g}$}\!\left/ \!\raisebox{-1ex}{$\mathbf{mol}$}\right.}}}{\mathbf{63}\mathbf{.}\mathbf{01}\mathbf{}\overline{){\displaystyle \raisebox{1ex}{$\mathbf{g}$}\!\left/ \!\raisebox{-1ex}{$\mathbf{mol}$}\right.}}}\mathbf{\times}\mathbf{100}$

Calculate the mass percent composition of nitrogen in each of the following nitrogen compounds.

HNO_{3}

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