**Mass percent formula **shown below:

$\overline{){\mathbf{mass}}{\mathbf{}}{\mathbf{percent}}{\mathbf{=}}\frac{\mathbf{mass}\mathbf{}\mathbf{element}}{\mathbf{total}\mathbf{}\mathbf{mass}\mathbf{}\mathbf{of}\mathbf{}\mathbf{compound}}{\mathbf{\times}}{\mathbf{100}}{\mathbf{\%}}}$

**Mass of C = 12.01 g/mol**

List the elements in the compound CF_{2}Cl_{2} in order of decreasing mass percent composition.

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