14. What is the number of moles in 42 g of NaCl?

A. 1.8 mol NaCl
B. 0.72 mol NaCl
C. 0.61 mol NaCl
D. 1.2 mol NaCl

I'm sorry, I have no idea what I'm doing here.

2 answers

mols = grams/molar mass
b. 0.72 mole naci