Click on formulas to make commands appear here (and then copy into calculator)
Formula from Chapter 9: definition of mole fraction
\(X_{\mathrm{A}} = \dfrac{n_{\mathrm{A}}}{n_{\mathrm{total}}}\)
\(n_{\mathrm{\ce{N2}}}\)
\(= 4.0\ \mathrm{mol}\)
\(n_{\mathrm{total}}\)
\(= 5.0\ \mathrm{mol}\)
\(X_{\mathrm{\ce{N2}}}\)
\(= \dfrac{n_{\mathrm{\ce{N2}}}}{n_{\mathrm{total}}}\)
\(\ \ \ =\dfrac{4.0\ \mathrm{mol}}{5.0\ \mathrm{mol}}\)
\(\ \ \ =0.80\)