Answer:
1.37 mol NaCl
Step-by-step explanation:
Hi!
For this one, you are given a mass (in grams) of NaCl, 80.0.
To convert this to moles, you have to do a mass-to-mole calculation, where you use the molar mass of NaCl.
Na's m.m. is 22.99 g/mol
Cl's m.m. is 35.45 g/mol
1(22.99 g/mol) + 1(35.45 g/mol) = 58.44 g/mol => here is the molar mass of NaCl.
Here's the setup for the conversion:
g(mol/g) - we are flipping g/mol to mol/g to get mol on top (since we are looking for the # of mol) and g on the bottom to cancel out the g unit.
80.0 g NaCl(1 mol NaCl/58.44 g NaCl) = 80.0 / 58.44 = 1.37 mol NaCl.
I hope this helped!