A $8\mathrm{.}00L$ tank at $19\mathrm{.}8C$ is filled with $2\mathrm{.}99g$ of chlorine pentafluoride gas and $5\mathrm{.}76g$ of sulfur hexafluoride gas. You can assume both gases behave as ideal gases under these conditions.

Calculate the mole fraction of each gas. Be sure each of your answer entries has the correct number of significant digits.

$\backslash$table$[[$gas$,$mole fraction$],[$chlorine pentafluoride,$],[$sulfur hexafluoride,$]]$