Chapter 17, Problem 111AE

(a)

Interpretation Introduction

Interpretation:

The molar mass and improvisation in the results need to be calculated.

Concept Introduction :

Molar mass of a compound may be given by mass of a substance to the amount of the substance. It could be given by the formula:

  $\text{molar mass =}\frac{\text{mass of substance}}{\text{amount of substance}}$

(b)

Interpretation Introduction

Interpretation:

Whether the Chemist can confirm that the substance is cocaine or not needs to be determined.

Concept Introduction :

Molar mass of a compound may be given by mass of a substance to the amount of the substance. It could be given by the formula:

  $\text{molar mass =}\frac{\text{mass of substance}}{\text{amount of substance}}$

(c)

Interpretation Introduction

Interpretation:

The method which can be used by the Chemist to improve the precision of the results needs to be explained.

Concept Introduction :

Molar mass of a compound may be given by mass of a substance to the amount of the substance. It could be given by the formula:

  $\text{molar mass =}\frac{\text{mass of substance}}{\text{amount of substance}}$