Textbook Question
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Chapter 3, Problem 1SAQ

What is the empirical formula of a compound with the molecular formula C 10 H 8 ?

a ) C 5 H 3

b ) C 2 H 4

c ) C 5 H 4

d ) C H

Expert Solution & Answer
Check Mark
Interpretation Introduction

Introduction: The formula that represents the ratio of elements present in the compound but not the actual number of atoms present in the molecule is called an empirical formula.

Answer to Problem 1SAQ

Correct answer: The correct answer is option (c).

Explanation of Solution

Justify reason for correct option:

For the given compound C10H8, the subscripts are 10 and 8. These can be reduced further to the simplest form, on dividing by two as the common factor to obtain 5 and 4. Therefore, the correct empirical formula of the given compound is C5H4. Thus, option (c) is the correct answer.

Justify reason for incorrect options:

In the other options, C10H8 cannot be reduced further to the simplest form other than 5 and 4. Thus, options (a),(b),and(d) are incorrect.

Conclusion: The correct empirical formula for the given compound C10H8 is C5H4.

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Chapter 3 Solutions

Chemistry: A Molecular Approach & Student Solutions Manual for Chemistry: A Molecular Approach, Books a la Carte Edition Package

Ch. 3 - Q11. Determine the mass of potassium in 35.5 g of...Ch. 3 - Prob. 12SAQCh. 3 - Prob. 13SAQCh. 3 - Prob. 14SAQCh. 3 - Prob. 15SAQCh. 3 - Prob. 1ECh. 3 - Prob. 2ECh. 3 - Prob. 3ECh. 3 - Prob. 4ECh. 3 - Prob. 5ECh. 3 - Prob. 6ECh. 3 - Prob. 7ECh. 3 - Prob. 8ECh. 3 - Prob. 9ECh. 3 - Prob. 10ECh. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 13ECh. 3 - Prob. 14ECh. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 - Prob. 18ECh. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 21ECh. 3 - 22. Write a generic formula for each of the...Ch. 3 - 23. Determine the number of each type of atom in...Ch. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - 26. Write a chemical formula for each molecular...Ch. 3 - Prob. 27ECh. 3 - Prob. 28ECh. 3 - 29. Classify each compound as ionic or...Ch. 3 - 30. Classify each compound as ionic or...Ch. 3 - 31. Based on the molecular views, classify each...Ch. 3 - 32. Based on the molecular views, classify each...Ch. 3 - 33. Write a formula for the ionic compound that...Ch. 3 - Prob. 34ECh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Prob. 37ECh. 3 - 38. Name each ionic compound. a. SnCl4 b. PbI2 c....Ch. 3 - 39. Give each ionic compound an appropriate...Ch. 3 - 40. Give each ionic compound an appropriate...Ch. 3 - Prob. 41ECh. 3 - Prob. 42ECh. 3 - Prob. 43ECh. 3 - Prob. 44ECh. 3 - Prob. 45ECh. 3 - Prob. 46ECh. 3 - Prob. 47ECh. 3 - 48. Name each molecular compound. a. SO3 b. SO2 c....Ch. 3 - Prob. 49ECh. 3 - 50. Write the formula for each molecular...Ch. 3 - Prob. 51ECh. 3 - Prob. 52ECh. 3 - Prob. 53ECh. 3 - 54. Write the formula for each acid. a. phosphoric...Ch. 3 - Prob. 55ECh. 3 - Use the nomenclature flowchart (Figure 3.10) to...Ch. 3 - Prob. 57ECh. 3 - Prob. 58ECh. 3 - 59. Calculate the formula mass for each...Ch. 3 - Prob. 60ECh. 3 - 61. Calculate the number of moles in each...Ch. 3 - 62. Calculate the mass of each sample. a. 15.7 mol...Ch. 3 - 63. Determine the number of moles (of molecules or...Ch. 3 - Prob. 64ECh. 3 - Prob. 65ECh. 3 - Prob. 66ECh. 3 - 67. Calculate the mass (in g) of each sample. a....Ch. 3 - Prob. 68ECh. 3 - 69. A sugar crystal contains approximately 1.8 ×...Ch. 3 - Prob. 70ECh. 3 - 71. Calculate the mass percent composition of...Ch. 3 - Prob. 72ECh. 3 - 73. Most fertilizers consist of...Ch. 3 - 74. Iron in the earth is in the form of iron ore....Ch. 3 - 75. Copper(II) fluoride contains 37.42% F by mass....Ch. 3 - Prob. 76ECh. 3 - 77. The iodide ion is a dietary mineral essential...Ch. 3 - 78. The American Dental Association recommends...Ch. 3 - 79. Write a ratio showing the relationship between...Ch. 3 - Prob. 80ECh. 3 - Prob. 81ECh. 3 - Prob. 82ECh. 3 - Prob. 83ECh. 3 - 84. Calculate the mass (in kilograms) of chlorine...Ch. 3 - 87. A chemist decomposes samples of several...Ch. 3 - 88. A chemist decomposes samples of several...Ch. 3 - 89. Calculate the empirical formula for each...Ch. 3 - 90. Calculate the empirical formula for each...Ch. 3 - 91. The elemental mass percent composition of...Ch. 3 - 92. The elemental mass percent composition of...Ch. 3 - 93. A 0.77-mg sample of nitrogen reacts with...Ch. 3 - 94. A 45.2-mg sample of phosphorus reacts with...Ch. 3 - The empirical formula and molar mass of several...Ch. 3 - 96. From the given molar mass and empirical...Ch. 3 - 97. Combustion analysis of a hydrocarbon produces...Ch. 3 - Prob. 96ECh. 3 - Prob. 97ECh. 3 - 100. Tartaric acid is the white, powdery substance...Ch. 3 - Prob. 99ECh. 3 - Prob. 100ECh. 3 - Prob. 101ECh. 3 - 104. When iron rusts, solid iron reacts with...Ch. 3 - Prob. 103ECh. 3 - Prob. 104ECh. 3 - Prob. 105ECh. 3 - 108. Write the balanced chemical equation for each...Ch. 3 - Prob. 107ECh. 3 - Prob. 108ECh. 3 - 111. Balance each chemical equation. a. CO2(g) +...Ch. 3 - 112. Balance each chemical equation. a. Na2S(aq) +...Ch. 3 - Prob. 111ECh. 3 - Prob. 112ECh. 3 - Prob. 113ECh. 3 - Prob. 114ECh. 3 - Prob. 115ECh. 3 - Prob. 116ECh. 3 - Prob. 117ECh. 3 - Prob. 118ECh. 3 - 121. How many molecules of ethanol (C2H5OH) (the...Ch. 3 - 122. A drop of water has a volume of approximately...Ch. 3 - 123. Determine the chemical formula of each...Ch. 3 - 124. Determine the chemical formula of each...Ch. 3 - Prob. 123ECh. 3 - Prob. 124ECh. 3 - 127. A metal (M) forms a compound with the formula...Ch. 3 - Prob. 126ECh. 3 - 129. Estradiol is a female sexual hormone that is...Ch. 3 - 130. Fructose is a common sugar found in fruit....Ch. 3 - 131. Combustion analysis of a 13.42-g sample of...Ch. 3 - 132. Estrone, which contains only carbon,...Ch. 3 - 133. Epsom salts is a hydrated ionic compound with...Ch. 3 - 134. A hydrate of copper(II) chloride has the...Ch. 3 - Prob. 133ECh. 3 - Prob. 134ECh. 3 - Prob. 135ECh. 3 - Prob. 136ECh. 3 - Prob. 137ECh. 3 - Prob. 138ECh. 3 - Prob. 139ECh. 3 - 142. A phosphorus compound that contains 34.00%...Ch. 3 - Prob. 141ECh. 3 - 144. Phosphorus is obtained primarily from ores...Ch. 3 - Prob. 143ECh. 3 - Prob. 144ECh. 3 - Prob. 145ECh. 3 - Prob. 146ECh. 3 - Prob. 147ECh. 3 - Prob. 148ECh. 3 - 151. Lead is found in Earth's crust as several...Ch. 3 - 152150. A 2.52-g sample of a compound containing...Ch. 3 - 153. A compound of molar mass 229 g/mol contains...Ch. 3 - Prob. 152ECh. 3 - Prob. 153ECh. 3 - Prob. 154ECh. 3 - 157. When molecules are represented by molecular...Ch. 3 - Prob. 156ECh. 3 - Prob. 157ECh. 3 - Prob. 158ECh. 3 - 161. Without doing any calculations, arrange the...Ch. 3 - Q60. Element A is an atomic element, and element...
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