Chapter 19.1, Problem 10R

To determine

To calculate: the number of moles in 125 g of water.

Answer to Problem 10R

The mole of water is 6.9 moles.

Explanation of Solution

Given:

The mass of water is 125 g.

Formula used:

Number of moles can be expressed as

  $\text{number}\text{of}\text{moles=}\frac{\text{mass}\text{of}{\text{H}}_{\text{2}}\text{O}}{\text{molar}\text{mass}\text{of}{\text{H}}_{\text{2}}\text{O}}$.... (1)

Calculation:

Molar mass of moles is 18 g/mole.

  $\begin{array}{c}\text{number}\text{of}\text{moles=}\frac{125\text{g}}{18\text{g/mole}}\\ =6.9\text{mole}\end{array}$

Conclusion:

Hence, the mole of water is 6.9 moles.