Answer:The percent by mass of hydrogen in aspirin is 44.4%.
Explanation:
The molar mass of the Aspirin ,[tex]C_9H_8O_4[/tex]:
[tex]9\times 12 u+8\times 1 u+4\times 16 u= 180 u[/tex]
Mass of hydrogen present in one formula unit of Aspirin: [tex]8\times 1 u=8 u[/tex]
[tex]\text{mass percentage of hydrogen}=\frac{\text{total mass of hydrogen in Aspirin}}{\text{Molar mass of the Aspirin}}\times 100[/tex]
[tex]\text{mass percentage of hydrogen}=\frac{8 u}{180 u}\times 100=4.44\%[/tex]
The percent by mass of hydrogen in aspirin is 44.4%.
