Answer
Find total mass using molecular weight of each element x number of atoms, then find percent mass for each element by using $\frac{M_{element} \times number atom}{total mass} \times 100$
Work Step by Step
Find total mass using molecular weight of each element x number of atoms, then find percent mass for each element by using $\frac{M_{element} \times number atom}{total mass} \times 100$
$\text{Molar mass}=(14\times 12.01)+(13\times 1.008)+((3\times 16.00)+(1\times 22.99)=252.234\text{ g/mol}$
Calculate mass percent of each element:
$\%C=\frac{168.14}{252.234}\times=66.70\%$
$\%H=\frac{13.104}{252.234}\times 100=5.196\%$
$\%O=\frac{48.00}{252.234}\times 100=19.04\%$
$\%Na=\frac{22.99}{252.234}\times 100=9.118\%$
