# Convert the mass of your limiting reactant to a number of moles.

Dec 2, 2014

To convert the mass of any substance to moles, use the given mass and its molar mass as shown in the example below.

Example:

The limiting reactant in a chemical reaction is determined to be $\text{NaCl}$. The mass of the $\text{NaCl}$ is $\text{4.50 g}$. The molar mass of $\text{NaCl}$ is $\text{58.44 g/mol}$. Convert the mass into moles.

$\text{4.50 g NaCl}$ x $\text{1 mol NaCl"/"58.44g NaCl}$ = $\text{0.0770 mol NaCl}$

Here is a video which discusses how to determine limiting reactants.

video from: Noel Pauller