Chapter F, Problem F.13E

(a)

Interpretation Introduction

Interpretation:

Empirical formula of the white solid compound has to be given.

Concept Introduction:

Empirical formula is the one that can be determined from the molar mass of the elements that is present in the compound and the mass percentage of the elements.  The mass percentage of the elements present in the compound is converted into the moles of each element considering the molar mass of each element.  The relative number of moles for each type of atoms is found out finally.

(b)

Interpretation Introduction

Interpretation:

Compound ${\text{PCl}}_{\text{5}}$ has to be named.

Concept Introduction:

Binary molecular compounds are named by using the elements present in it and the number of atoms present in a molecule.

Rules for naming molecular compounds:

• First element name is written as such that is followed by the name of the second element in which the suffix is changed to –ide.
• Greek prefixes are used to indicate the number of atoms of each element that is present.  Generally prefix mono- is ignored.