Chapter 12, Problem 50PE

(a)

Interpretation Introduction

Interpretation:

Volume of ${\text{H}}_2$ gas produced from $42.9\text{ g Mg}$ at STP has to be determined.

Concept Introduction:

Ideal gas law represented as equation to relate its volume and pressure with its temperature. Expression for ideal gas equation is as follows:

  $PV=nRT$        (1)

Here,

$P$ is pressure of the gas.

$V$ is volume of gas.

$n$ denotes moles of gas.

$R$ is gas constant.

$T$ is temperature of gas.

(b)

Interpretation Introduction

Interpretation:

Number of moles of $\text{HCl}$ required to produce $825\text{ mL}$ of ${\text{H}}_2$ at STP has to be determined.

Concept Introduction:

Refer to part (a).