Question

What is the percent by mass of hydrogen in aspirin (c9h8o4)?

Answer 1

Calculate the Mr of aspirin, next workout the percentage of H/aspirin

Answer 2

Answer:The percent by mass of hydrogen in aspirin is 44.4%.

Step-by-step explanation:

The molar mass of the Aspirin ,
`C_9H_8O_4`:

`9* 12 u+8* 1 u+4* 16 u= 180 u`

Mass of hydrogen present in one formula unit of Aspirin:
`8* 1 u=8 u`

`\text{mass percentage of hydrogen}=\frac{\text{total mass of hydrogen in Aspirin}}{\text{Molar mass of the Aspirin}}* 100`

`\text{mass percentage of hydrogen}=(8 u)/(180 u)* 100=4.44\%`

The percent by mass of hydrogen in aspirin is 44.4%.