How many moles are in 213 grams of NaCl?

There are 3, 64 moles of NaCl.

Explanation:

First we calculate the mass of 1 mol of NaCl, starting from the atomic weights of Na and Cl obtained from the periodic table. Then we calculate themoles in 213 grams of NaCl, making a simple rule of three:

Weight NaCl= Weight Na + Weight Cl = 23 g + 35, 5 g= 58, 5 g/ mol

58,5 g 1 mol NaCl

213 gx= (213 g x 1 mol NaCl)/ 58, 5 g= 3, 64 mol NaCl