Explanation:
The formula for tryptophan is [tex]C_{11}H_{12}N_{2}O_{2}[/tex]
Mass of [tex]C[/tex] in tryptophan is [tex]11\times 12=132g[/tex]
Mass of [tex]H[/tex] in tryptophan is [tex]12\times 1=12g[/tex]
Mass of [tex]N[/tex] in tryptophan is [tex]2\times 14=28g[/tex]
Mass of [tex]O[/tex] in tryptophan is [tex]2\times 16=32g[/tex]
So,[tex]\text{total mass}=132+12+28+32=204g[/tex]
[tex]\text{mass of carbon}=132g[/tex]
[tex]\text{mass percent of carbon}=\frac{\text{mass of carbon}}{\text{total mass}}\times 100 =\frac{132}{204}\times 100 =64.7[/tex]%
