Chapter 6.7, Problem 2QQ

Interpretation Introduction

Interpretation:

The number of moles of $Al$ that is required to produce $6.0moles$ of $A{l}_2{S}_3$ has to be chosen from the given options considering the chemical equation $2Al+3S\stackrel{}{\to }A{l}_2{S}_3$.

Concept Introduction:

The coefficients that are present in a balanced chemical equation is like subscripts in the chemical formula.  These coefficients can be interpreted in two levels.  One is a microscopic level and another is macroscopic level.

Microscopic level:

The coefficients that are present in a balanced chemical equation gives numerical relationship between the formula units consumed or produced when a chemical reaction takes place.

Macroscopic level:

In a balanced chemical equation, the coefficients gives information about the fixed molar ratios among the substance that is consumed or produced when a chemical reaction takes place.