Question

20 multiple choice 1 point aspirin is a common medicine to treat pain relief related to issues such as headaches and toothaches. the chemical formula for aspirin is c₉h₈o₄. what is the most accurate percent composition of carbon in aspirin? 80% 60% 50% 70%

Explanation:

Step1: Calculate molar mass of aspirin

Molar mass of \( C_9H_8O_4 \):
Carbon: \( 9 \times 12.01 = 108.09 \)
Hydrogen: \( 8 \times 1.008 = 8.064 \)
Oxygen: \( 4 \times 16.00 = 64.00 \)
Total molar mass: \( 108.09 + 8.064 + 64.00 = 180.154 \, \text{g/mol} \)

Step2: Calculate mass of carbon

Mass of C in 1 mol: \( 9 \times 12.01 = 108.09 \, \text{g} \)

Step3: Calculate percent composition of C

Percent composition \( = \frac{\text{Mass of C}}{\text{Molar mass of aspirin}} \times 100 \)
\( = \frac{108.09}{180.154} \times 100 \approx 60\% \)

Answer:

60% (the option with "60%")