# What is the mole fraction of NaCl if 117 g of it is dissolved in 180 mL of water?

Apr 17, 2017

16.83 M

#### Explanation:

For this we'd use the following equation:

$M o l a r i t y = \frac{N}{V}$

N meaning the grams/moles and V meaning the volume in Liters.

So first we find the molar mass of NaCl to be 58.44 grams.

we can setup this proportion to find the 'n'

$\frac{x}{117} = \frac{1}{58.44}$

$\frac{177}{58.44} =$3.03

Now we convert the 180 mL to L, so .180 L.

Finally,

$M = \frac{3.03}{.180}$

M=16.83

The molarity (mole fraction) is 16.83 Molar