Answer:
[tex]6.19\times 10^{-3}[/tex] is the mole fraction of potassium dichromate.
Explanation:
Mass of potassium dichromate = 24.42 g
Moles of potassium dichromate =[tex]n_1=\frac{24.42 g}{294.185 g/mol}=0.0830 mol[/tex]
Mass of water = 240.0 g
Moles of water =[tex]n_2=\frac{240.0 g}{18.015 g/mol}=13.3222 mol[/tex]
Mole fraction is calculated by:
[tex]\chi_1=\frac{n_1}{n_1+n_2}[/tex]
[tex]\chi_1=\frac{0.0830 mol}{0.0830 mol+13.3222 mol}=0.00619=6.19\times 10^{-3}[/tex]
[tex]6.19\times 10^{-3}[/tex] is the mole fraction of potassium dichromate.
