Chapter 3: Q45P (page 132)

Acetaminophen (below)is a popular nonaspirin, “over-thecounter” pain reliever. What is the mass % of each element in acetaminophen?

Short Answer

Expert verified

The final mass % each element is:

C = 71.1%

H = 6.7%

N = 10.4%

O = 11.8%

The molecular formula is $C_{8} H_{9} N 0_{2}$

Step by step solution

Determine the Preliminary formula of the compound

This is the structure of the molecule and has the molecular formula $C_{8} H_{9} N 0_{2}$

It has 8 C, 9 H, 1N, and 2O, for each element we have to calculate the % of the element.

Calculation of the mass % of the C in acetaminophen

The mass % of the element is:

$mass % of element = \frac{mass of element in 1 mole of compound}{mass of 1 mole of compound} \times 100 %$

The mass of 1 mole of compound is:

$1 mole of compound = 8 \times (12.011 g) + 9 \times (1.001 g) + 14.007 g + 2 + (15.999 g) = 135.166 g$

Thus, the mass % of C is calculated as:

$% C = \frac{8 \times (12.011)}{135.166} \times 100 % = 71.1 %$

Determine the mass % of the H in acetaminophen

The mass % of H is:

$% H = \frac{9 (1.008)}{135.166} \times 100 % = 6.7 %$

Determine the mass % of the N in acetaminophen

$% H = \frac{14.009}{135.166} \times 100 % = 10.4 %$

Determine the mass % of the O in acetaminophen

The mass % of O is:

$% O = \frac{2 \times (15.999)}{135.166} \times 100 % = 11.8 %$

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Chemistry Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Acetaminophen (below)is a popular nonaspirin, “over-thecounter” pain reliever. What is the mass % of each element in acetaminophen?

Short Answer

Step by step solution

Determine the Preliminary formula of the compound

Calculation of the mass % of the C in acetaminophen

Determine the mass % of the H in acetaminophen

Determine the mass % of the N in acetaminophen

Determine the mass % of the O in acetaminophen

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Organic Chemistry

Ionic and Molecular Compounds

Chemical Analysis

Kinetics

Chemistry Branches

Physical Chemistry

Study anywhere. Anytime. Across all devices.