Question

3. A 134.50 g sample of aspirin is made up of 6.03 g of hydrogen, 80.70 g of carbon, and 47.77 g of oxygen. What is the percent by mass of each element in aspirin?

Answer 1

Answer:

The percentage of mass of hydrogen in aspirin is 4.48%

The percentage of mass of carbon in aspirin is 60%

The percentage of mass of oxygen in aspirin is 35.5%

Explanation:

Given that,

Mass of sample of aspirin = 134.50 g

Mass of hydrogen = 6.03 g

Mass of carbon = 80.70 g

Mass of oxygen = 47.77 g

We need to calculate the percentage of mass of hydrogen in aspirin

Using formula for percentage of mass

$\text{percentage of mass of hydrogen}=\dfrac{m_{h}}{m_{s}}\times100$

Put the value into the formula

$\text{percentage of mass of hydrogen}=\dfrac{6.03}{134.50}\times100$

$\text{percentage of mass of hydrogen}=4.48\%$

We need to calculate the percentage of mass of carbon in aspirin

Using formula for percentage of mass

$\text{percentage of mass of carbon}=\dfrac{m_{c}}{m_{s}}\times100$

Put the value into the formula

$\text{percentage of mass of carbon}=\dfrac{80.70}{134.50}\times100$

$\text{percentage of mass of carbon}=60\%$

We need to calculate the percentage of mass of oxygen in aspirin

Using formula for percentage of mass

$\text{percentage of mass of oxygen}=\dfrac{m_{o}}{m_{s}}\times100$

Put the value into the formula

$\text{percentage of mass of oxygen}=\dfrac{47.77}{134.50}\times100$

$\text{percentage of mass of oxygen}=35.5\%$

Hence, The percentage of mass of hydrogen in aspirin is 4.48%

The percentage of mass of carbon in aspirin is 60%

The percentage of mass of oxygen in aspirin is 35.5%