Chapter 12, Problem 12.134MP

Interpretation Introduction

(a)

Interpretation:

Mass of iron is to be determined.

Concept introduction:

Mathematical expression for ideal gas equation is as follows:

$PV=nRT$

Where,

• $P$ is pressure of gas.
• $V$ is volume of gas.
• $n$ is moles of gas.
• $R$ is universal gas constant.
• $T$ is absolute temperature of gas.

Interpretation Introduction

(b)

Interpretation:

Formula of magnetite should be determined.

Concept introduction:

Chemical formula of compound provides information about number of atoms of all elements present in it. It consists of symbols of elements along with their number in form of subscripts.

Interpretation Introduction

(c)

Interpretation:

Number of $\text{Fe}$ and $\text{O}$ atoms present in each unit cell are to be determined.

Concept introduction:

Unit cell is the smallest building block of any crystal that is composed of ions, molecules or ions. Its repetition leads to formation of network known as lattice.