Solution Found!

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro
Change Question

Solved: Caffeine, a stimulant found in coffee and soda, has the mass percent

Chapter 6, Problem 120P

(choose chapter or problem)

Get Unlimited Answers
QUESTION:

Caffeine, a stimulant found in coffee and soda, has the mass percent composition: C, 49.48%; H, 5.19%; N, 28.85%; O, 16.48%. The molar mass of caffeine is 194.19 g/mol. Find the molecular formula of caffeine.

Questions & Answers

QUESTION:

Caffeine, a stimulant found in coffee and soda, has the mass percent composition: C, 49.48%; H, 5.19%; N, 28.85%; O, 16.48%. The molar mass of caffeine is 194.19 g/mol. Find the molecular formula of caffeine.

ANSWER:

Solution 120P

Step 1:

Given :

Mass percent composition of C = 49.48%

Mass percent composition of H = 5.19%

Mass percent composition of N = 28.85%

Mass percent composition of O = 16.48%

Molar mass of caffeine = 194.19 g/mol

Molecular formula of caffeine = ?

To find the molecular formula, we need to find the number of atoms.

        number of moles (n) =

To find the mass of element here, we multiply the mass percent composition with the molar mass of caffeine.

Mass of carbon (C) =194.19 = 96.0852 g

Mass of hydrogen(H) =194.19 = 10.078 g

Mass of nitrogen(N) =194.19 = 56.023 g

Mass of  oxygen(O) =194.19 = 32.00 g

Add to cart

Study Tools You Might Need

Chapter: 5 Problem: 34P

Introductory Chemistry 5
Write chemical formulas for compounds containing: (a) one calcium atom for every two iodine atoms (b) two nitrogen atoms for every four oxygen atoms (c) one silicon atom for every two oxygen atoms (d) one zinc atom for every two chlorine atoms

Chapter: 2 Problem: 4E

Statistics for Engineers and Scientists 4
Two batteries, with voltages \(V_1\) and \(V_2\), are connected in series. The total voltage V is given by \(V=V_1+V_2\). Assume that \(V_1\) has mean 12 V and standard deviation 1 V, and that \(V_2\) has mean 6 V and standard deviation 0.5 V. a. Find \(\mu_V\). b. Assuming \(V_1\) and \(V_2\) to

Chapter: 10 Problem: 10-22

Engineering Mechanics: Statics 14
Determine the moment of inertia for the shaded area about the y axis.

Chapter: 4 Problem: 4.1.20

BSCS Biology: A Molecular Approach 9
In what ways is photosynthesis important to humans?

Chapter: 2 Problem: 35

College Physics for AP® Courses 1
Consider a grey squirrel falling out of a tree to the ground. (a) If we ignore air resistance in this case (only for the sake of this problem), determine a squirrel's velocity just before hitting the ground, assuming it fell from a height of 3.0 m. (b) If the squirrel stops in a distance of 2.0 cm th

Chapter: 1 Problem: Question 1

Inquiry into Physics 7
Two rectangular rugs are on display in a showroom. If one rug is twice as long as the other, does this necessarily mean that its area is also twice as large as that of the second? Explain.

Chapter: 21 Problem: Questions for Review 21.1

Principles of Economics 6
A consumer has income of $3,000. Wine costs $3 per glass, and cheese costs $6 per pound. Draw the consumers budget constraint. What is the slope of this budget constraint?

Chapter: 4 Problem: 6

Human Biology 11
Define the terms tissue, organ, and organ system. List the bodys eleven major organ systems.

Not The Solution You Need? Search for Your Answer Here:

×

Login

Login or Sign up for access to all of our study tools and educational content!

Forgot password?
Register Now

×

Register

Sign up for access to all content on our site!

Or login if you already have an account

×

Reset password

If you have an active account we’ll send you an e-mail for password recovery

Or login if you have your password back