Chapter U2.2, Problem 5E

(a)

Interpretation Introduction

Interpretation: Molecular formula needs to be determined for ${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}\text{COOH}$

Concept introduction: Atoms combine to form molecules. Molecular formula is the chemical formula, which shows actual number of atoms of each element present in the molecule of the compound.

Answer to Problem 5E

  ${\text{C}}_{\text{3}}{\text{H}}_{\text{6}}{\text{O}}_{\text{2}}$

Explanation of Solution

The structure of the molecule is as follows:

  

Total number of ‘C’ atom = 3

Total number ‘H’ atom = 6

Total number of ‘O’ atom = 2

Therefore the molecular formula is ${\text{C}}_{\text{3}}{\text{H}}_{\text{6}}{\text{O}}_{\text{2}}$

(b)

Interpretation Introduction

Interpretation: The molecular formula needs to be determined for ${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}{\text{CH}}_2{\text{COCH}}_3$

Concept introduction: Atoms combine to form molecules. Molecular formula is the chemical formula, which shows actual number of atoms of each element present in the molecule of the compound.

Answer to Problem 5E

  ${\text{C}}_5{\text{H}}_{\text{10}}\text{O}$

Explanation of Solution

The structure of the molecule is represented as follows:

  

Total number of ‘C’ atom = 5

Total number ‘H’ atom = 10

Total number of ‘O’ atom = 1

Therefore, the molecular formula is $C_5{H}_{10}O$ .

(c)

Interpretation Introduction

Interpretation: Molecular formula needs to be determined for the compound ${\text{CH}}_{\text{3}}{\text{CH(CH}}_3{\text{)COCH}}_3$ .

Concept introduction: Atoms combine to form molecules. Molecular formula is the chemical formula, which shows actual number of atoms of each element present in the molecule of the compound.

Answer to Problem 5E

  ${\text{C}}_5{\text{H}}_{\text{10}}\text{O}$

Explanation of Solution

The structure of the molecule is as follows:

  

Total number of ‘C’ atom = 5

Total number ‘H’ atom = 10

Total number of ‘O’ atom = 1

Therefore the molecular formula is $C_5{H}_{10}O$ .

(d)

Interpretation Introduction

Interpretation: Molecular formula needs to be determined for the compound ${\text{CH}}_{\text{3}}{\text{CH}}_2{\text{COOCH}}_3$ .

Concept introduction: Atoms combine to form molecules. Molecular formula is the chemical formula, which shows actual number of atoms of each element present in the molecule of the compound.

Answer to Problem 5E

  $C_4{H}_8{O}_2$

Explanation of Solution

The structure of the molecule is as follows:

  

Total number of ‘C’ atom = 4

Total number ‘H’ atom = 8

Total number of ‘O’ atom = 2

Therefore, the molecular formula is $C_4{H}_8{O}_2$

(e)

Interpretation Introduction

Interpretation: Molecular formula needs to be determined for the compound ${\text{CH}}_{\text{3}}{\text{CH}}_2{\text{CH}}_2{\text{NHCH}}_3$

Concept introduction: Atoms combine to form molecules. Molecular formula is the chemical formula, which shows actual number of atoms of each element present in the molecule of the compound.

Answer to Problem 5E

  $C_4{H}_{11}N$

Explanation of Solution

The structure of the molecule is as follows:

  

Total number of ‘C’ atom = 4

Total number ‘H’ atom = 11

Total number of ‘N’ atom = 1

Therefore, the molecular formula is $C_4{H}_{11}N$ .

(f)

Interpretation Introduction

Interpretation: The molecular formula needs to be determined in the compound ${\text{CHOOCH}}_{\text{3}}$ .

Concept introduction: Atoms combine to form molecules. Molecular formula is the chemical formula, which shows actual number of atoms of each element present in the molecule of the compound.

Answer to Problem 5E

  ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}{\text{O}}_{\text{2}}$

Explanation of Solution

The structure of the molecule is as follows:

  

Total number of ‘C’ atom = 4

Total number ‘H’ atom = 4

Total number of ‘O’ atom = 2

Therefore, the molecular formula is ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}{\text{O}}_{\text{2}}$ .