Chapter 19, Problem 14TE

To determine

Number of moles in $\text{171 g}$ of sugar.

Answer to Problem 14TE

The $\text{171 g}$ of sugar will contain $0.5\text{ moles}$ of sugar molecules.

Explanation of Solution

The solution contains a solute component and a solvent component. The concentration of the solution depends on the amount of both of these components.

The amount of solute can be expressed in a mole. The mole is the ratio of the weight of the compound taken to the molecular weight of a compound.

If $\text{342 g}$ of the sugar contains, 1 mole of sugar molecules.

Then $\text{171 g}$ of sugar will contain,

$\begin{array}{l}=\frac{171\text{ g}\times 1\text{ mole}}{\text{342 g}}\\ =0.5\text{ moles}\end{array}$

Conclusion:

Therefore, the $\text{171 g}$ of sugar will contain $0.5\text{ moles}$ of sugar molecules.