Chapter 10 - Section 10.5 - Gas Mixtures - Checkpoint - Page 454: 10.5.5

$χ_{red}=\frac{5}{16} = 0.3125$ $χ_{blue}=\frac{4}{16} = 0.25$ $χ_{green}=\frac{7}{16} = 0.4375$

$χ_{i}=\frac{n_{i}}{n_{total}}$ $n_{Total}=16mol$ $n_{red}=5mol$ $n_{blue}=4mol$ $n_{green}=7mol$ $χ_{red}=\frac{5}{16} = 0.3125$ $χ_{blue}=\frac{4}{16} = 0.25$ $χ_{green}=\frac{7}{16} = 0.4375$