Chapter 12, Problem 105DIA

a.

Interpretation Introduction

To identify: The pattern that is being followed by the metals that form hydrides and the metals that do not.

b.

Interpretation Introduction

To explain: The reason for using two metals (magnesium and niobium) to prepare a complex hydride to store hydrogen.

c.

Interpretation Introduction

To calculate: The mass percentage of $\text{H}$ in the complex hydride.

d.

Interpretation Introduction

To explain: If the hydrogen content and the enthalpy of the formation of the complex hydride made of magnesium and niobium are in the efficient zone.

e.

Interpretation Introduction

To explain: Whether the hydrides are to be cooled or heated for releasing the hydrogen.