Chapter 1, Problem 1.31EP

(a)

Interpretation Introduction

Interpretation:

Substance A, B, and C has to be classified as element, or compound, or no such classification possible from the given reaction $\text{A}\text{+}\text{B}\stackrel{}{\to }\text{C}$.

Concept Introduction:

Element is a pure substance and it cannot be broken down into simpler pure substance by chemical means like chemical reaction, electric current, heat, or light.

Compound is also a pure substance that can be broken down into simpler substance by chemical means and not physical means.

(b)

Interpretation Introduction

Interpretation:

Substance D, E, F, and G has to be classified as element, or compound, or no such classification possible from the given reaction $\text{D}\stackrel{}{\to }E+F+G$.

Concept Introduction:

Element is a pure substance and it cannot be broken down into simpler pure substance by chemical means like chemical reaction, electric current, heat, or light.

Compound is also a pure substance that can be broken down into simpler substance by chemical means and not physical means.