Chapter 22, Problem 67A

(a)

Interpretation Introduction

Interpretation- To determine the amount of aromatic compounds produced.

Introduction-

Aromatic compounds are those compounds which have rings and double bonds like benzene.

These are unsaturated compounds responsible for aromas of many spices, perfumes etc.

Answer to Problem 67A

The amount of aromatic compound produced is $\text{9}\text{.6}\text{billion}\text{kg}$

Explanation of Solution

In the given list benzene and ethyl benzene are the aromatic compounds.

Mass of benzene is $\text{5}\text{.3}\text{billion}\text{kg}$

Mass of ethylbenzene is $\text{4}\text{.3}\text{billion}\text{kg}$

Therefore, the total amount of aromatic compound is $\text{5}\text{.3}\text{billion}\text{kg+}\text{4}\text{.3}\text{billion}\text{kg=9}\text{.6}\text{billion}\text{kg}$

Conclusion

Therefore, the amount of aromatic compound is $\text{9}\text{.6}\text{billion}\text{kg}$

(b)

Interpretation Introduction

Interpretation- To determine the mass percent of aliphatic compounds,

Introduction- Mass percent : It is mass by percent of compound from total mass. It can be formulated as:

  $\text{Mass}\text{percent=}\frac{\text{mass}\text{of}\text{compound}}{\text{total}\text{mass}}\text{×100}$

Answer to Problem 67A

Explanation of Solution

Aliphatic compound are open chain structures which have straight chain whether branched or non-branched structures. They do not have any type of rings.

From the given list, ethene and propene are aliphatic compounds.

Mass percent of aliphatic compounds can be determined as:

Total mass of compound = $\text{15}\text{.9}\text{billion}\text{kg+8}\text{.4}\text{bollion}\text{kg+5}\text{.3}\text{billion}\text{kg+}\text{4}\text{.3}\text{billion}\text{kg=33}\text{.9}\text{billion}\text{kg}$

Total mass of aliphatic compounds = $\text{15}\text{.9}\text{billion}\text{kg+8}\text{.4}\text{bollion}\text{kg=24}\text{.3}\text{billion}\text{kg}$

  $\begin{array}{l}\text{Mass}\text{percent=}\frac{\text{mass}\text{of}\text{compound}}{\text{total}\text{mass}\text{of}\text{compounds}}\text{×100}\\ \text{Mass}\text{percent=}\frac{\text{24}\text{.3}}{\text{33}\text{.9}}\text{×100=71}\text{.7\%}\end{array}$

Therefore, the mass percent of aliphatic compound is $71.7\%$

Conclusion

Therefore, the mass percent of aliphatic compound is $71.7\%$