Chapter 24.2, Problem 24.4AFP

(a)

Interpretation Introduction

Interpretation:

Specific activity of ${}^{76}As$ in $\text{Ci/g}$ has to be determined using the given information.

Concept Introduction:

Mass of a substance can be determined from molar mass as given,

  $Mass\text{ = No}\text{. of moles}\times \text{Molar mass}$

Unit conversion:

$Specific\text{ activity }\left(in\text{ Ci/g}\right)\text{= }No.\text{of disintegrations per second}\times \frac{1\text{ Ci}}{3.70\times {10}^{10}\text{ d/s}}\times \frac{1}{Mass}$

(b)

Interpretation Introduction

Interpretation:

Specific activity of ${}^{76}As$ in $\text{Bq/g}$ has to be determined using the given information.

Concept Introduction:

Mass of a substance can be determined from molar mass as given,

  $Mass\text{ = No}\text{. of moles}\times \text{Molar mass}$

Unit conversion:

$Specific\text{ activity }\left(in\text{ Bq/g}\right)\text{= }No.\text{of disintegrations per second}\times \frac{1\text{ Bq}}{1\text{ d/s}}\times \frac{1}{Mass}$