# NaCl has a #DeltaH_(fus)# = 30.2 kJ/mol. What is the mass of a sample of NaCl that needs 732.6 kJ of heat to melt completely?

##### 1 Answer

Jun 15, 2017

#### Explanation:

Determine moles Na by dividing by its heat of fusion.

Determine mass of Na by dividing by its molar mass (atomic weight in g/mol).