Chapter 4, Problem 4.53SP

Interpretation Introduction

(a)

Interpretation:

The given concentration of gold in g/mL needs to be converted into mol/L

Concept introduction:

The number of moles can be calculated from mass and molar mass as follows:

$n=\frac{m}{M}$

Here, m is mass and M is molar mass.

Interpretation Introduction

(b)

Interpretation:

The mass of gold dissolved in the ocean needs to be calculated if the volume of ocean is $1.3\times {10}^{21}\text{ L}$.

Concept introduction:

The molarity or concentration of the solution can be calculated as follows:

$M=\frac{n}{V\left(L\right)}$

Here, n is number of moles and V is volume of solution in L.