Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN: 9780078746376
Author: Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher: Glencoe/McGraw-Hill School Pub Co
Question
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Chapter 21, Problem 16STP
Interpretation Introduction

Interpretation:

The formula of the compound should be determined on the basis of following figure.

Chemistry: Matter and Change, Chapter 21, Problem 16STP

A. C5H20N4O2

B. C8H2N9O11

C. C1.6H5N1.6O3.3

D. CH3NO2

E. C2H5NO2

Concept introduction:

Number of moles is equal to the ratio of given mass to the molar mass.

The mathematical expression is given by:

Number of moles = massMolar mass

Molar mass of the molecule is equal to the sum of the masses of atoms present in the molecule.

Expert Solution & Answer
Check Mark

Answer to Problem 16STP

Option (D) is correct that is CH3NO2.

Explanation of Solution

According to the given figure,

Percentage of carbon = 19.68 %

Percentage of oxygen = 52.42 %

Percentage of hydrogen = 4.96 %

Percentage of nitrogen = 22.95 %

Let, total mass of the compound = 100 grams.

Thus, mass of carbon ( C ) = 19.68 g

Mass of oxygen ( O ) = 52.42 g

Mass of hydrogen ( H ) = 4.96 g

Mass of nitrogen ( N ) = 22.95 g

Now,

Molar mass of carbon = 12.011 g/mole

Number of moles of carbon = 19.68 g12.011 g/mole

= 1.64 mole

Molar mass of oxygen = 15.999 g/mole

Number of moles of oxygen = 52.42 g15.999 g/mole

= 3.28 mole

Molar mass of hydrogen = 1.008 g/mole

Number of moles of hydrogen = 4.96 g1.008 g/mole

= 4.92 mole

Molar mass of nitrogen = 14.007 g/mole

Number of moles of nitrogen = 22.95 g14.007 g/mole

= 1.64 mole

Divide each number of moles by smallest number 1.64.

Number of moles of carbon = 1.64 mole1.64 mole

= 1 mole

Number of moles of oxygen = 3.28 mole1.64 mole

= 2 moles

Number of moles of hydrogen = 4.92 mole1.64 mole

= 3 moles

Number of moles of nitrogen = 1.64 mole1.64 mole

= 1 mole

Thus, the formula of compound is CH3NO2.

Hence, option (D) is correct.

Chapter 21 Solutions

Chemistry: Matter and Change

Ch. 21.2 - Prob. 11PPCh. 21.2 - Prob. 12SSCCh. 21.2 - Prob. 13SSCCh. 21.2 - Prob. 14SSCCh. 21.2 - Prob. 15SSCCh. 21.2 - Prob. 16SSCCh. 21.3 - Prob. 17PPCh. 21.3 - Prob. 18PPCh. 21.3 - Prob. 19SSCCh. 21.3 - Prob. 20SSCCh. 21.3 - Prob. 21SSCCh. 21.3 - Prob. 22SSCCh. 21.3 - Prob. 23SSCCh. 21.3 - Prob. 24SSCCh. 21.4 - Prob. 25SSCCh. 21.4 - Prob. 26SSCCh. 21.4 - Prob. 27SSCCh. 21.4 - Prob. 28SSCCh. 21.4 - Prob. 29SSCCh. 21.4 - Prob. 30SSCCh. 21.5 - Prob. 31PPCh. 21.5 - Prob. 32PPCh. 21.5 - Prob. 33SSCCh. 21.5 - Prob. 34SSCCh. 21.5 - Prob. 35SSCCh. 21.5 - Prob. 36SSCCh. 21.5 - Prob. 37SSCCh. 21 - Prob. 38ACh. 21 - Prob. 39ACh. 21 - Prob. 40ACh. 21 - Prob. 41ACh. 21 - Prob. 42ACh. 21 - Prob. 43ACh. 21 - Prob. 44ACh. 21 - Prob. 45ACh. 21 - Prob. 46ACh. 21 - Prob. 47ACh. 21 - Prob. 48ACh. 21 - Prob. 49ACh. 21 - Prob. 50ACh. 21 - Prob. 51ACh. 21 - Prob. 52ACh. 21 - How does the structure of a cycloalkane differ...Ch. 21 - Prob. 54ACh. 21 - Prob. 55ACh. 21 - Prob. 56ACh. 21 - Prob. 57ACh. 21 - Prob. 58ACh. 21 - Prob. 59ACh. 21 - Prob. 60ACh. 21 - Prob. 61ACh. 21 - Prob. 62ACh. 21 - Prob. 63ACh. 21 - Prob. 64ACh. 21 - Prob. 65ACh. 21 - Prob. 66ACh. 21 - Prob. 67ACh. 21 - Prob. 68ACh. 21 - Prob. 69ACh. 21 - Prob. 70ACh. 21 - Prob. 71ACh. 21 - Prob. 72ACh. 21 - Prob. 73ACh. 21 - Prob. 74ACh. 21 - Prob. 75ACh. 21 - Prob. 76ACh. 21 - Prob. 77ACh. 21 - Prob. 78ACh. 21 - Prob. 79ACh. 21 - Prob. 80ACh. 21 - Prob. 81ACh. 21 - Prob. 82ACh. 21 - Prob. 83ACh. 21 - Prob. 84ACh. 21 - Prob. 85ACh. 21 - Prob. 86ACh. 21 - Prob. 87ACh. 21 - Prob. 88ACh. 21 - Prob. 89ACh. 21 - Prob. 90ACh. 21 - Prob. 91ACh. 21 - Prob. 92ACh. 21 - Prob. 93ACh. 21 - Prob. 94ACh. 21 - Prob. 95ACh. 21 - Prob. 96ACh. 21 - Prob. 97ACh. 21 - Prob. 98ACh. 21 - Prob. 99ACh. 21 - Prob. 100ACh. 21 - Prob. 101ACh. 21 - Prob. 1STPCh. 21 - Prob. 2STPCh. 21 - Prob. 3STPCh. 21 - Prob. 4STPCh. 21 - Prob. 5STPCh. 21 - Prob. 6STPCh. 21 - Prob. 7STPCh. 21 - Prob. 8STPCh. 21 - Prob. 9STPCh. 21 - Prob. 10STPCh. 21 - Prob. 11STPCh. 21 - Prob. 12STPCh. 21 - Prob. 13STPCh. 21 - Prob. 14STPCh. 21 - Prob. 15STPCh. 21 - Prob. 16STPCh. 21 - Prob. 17STP
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