Chapter 10, Problem 76A

Interpretation Introduction

Interpretation: To identify the empirical formula.

Concept Introduction: A chemical formula known as a "molecular formula" indicates how many atoms of each element there are in total in each molecule of a substance.

Answer to Problem 76A

(b), (c), and (d)

Explanation of Solution

Empirical formula would be a term used to describe a chemical formula that displays the most basic ratio of the components in a compound instead of the overall number of atoms in the molecule.

b) The empirical formula of the ethyl butyrate is ${\text{C}}_6{\text{H}}_{\text{12}}{\text{O}}_2$ and the molecular formula of the ribose is ${\text{C}}_6{\text{H}}_{\text{12}}{\text{O}}_2$ .

c) The empirical formula of the chlorophyll is ${\text{C}}_{55}{\text{H}}_{\text{72}}{\text{MgN}}_4{\text{O}}_5$ and the molecular formula of the ribose is ${\text{C}}_{55}{\text{H}}_{\text{72}}{\text{MgN}}_4{\text{O}}_5$ .

d) The empirical formula of the DEET is ${\text{C}}_{12}{\text{H}}_{17}\text{ON}$ and the molecular formula of the ribose is ${\text{C}}_{12}{\text{H}}_{17}\text{ON}$ .

Conclusion

a)The empirical formula of the ribose is ${\text{CH}}_{\text{2}}\text{O}$ and the molecular formula of the ribose is ${\text{C}}_{\text{5}}\text{H}{\text{10}}_{}{\text{O}}_{\text{5}}$ .