Answer
This is the mass percent of each element in acetaminophen:
Carbon: $ 63.56\%$
Hydrogen: $6.00\%$
Nitrogen: $9.27\%$
Oxygen : $ 21.17\%$
Work Step by Step
1. Calculate the total weight of the atoms:
Molecular weight ($C_8H_9NO_2$):
C: 12.01* 8 = 96.08
H: 1.008* 9 = 9.072
N: 14.01* 1 = 14.01
O: 16.00* 2 = 32.00
96.08 + 9.072 + 14.01 + 32.00 = 151.16 u.
2. Using the calculated values, find the mass percent in each case:
$mass\% = \frac{totalmass(Element)}{totalmass(Molecule)} \times 100\%$
C: $\frac{96.08}{151.16} \times 100\% = 63.56\%$
H: $\frac{9.072}{151.16} \times 100\% = 6.00\%$
N: $\frac{14.01}{151.16} \times 100\% = 9.27\%$
O: $\frac{32.00}{151.16} \times 100\% = 21.17\%$
