How Many Formula Units of Sodium Chloride Are in 146

How many formula units of sodium chloride are in 146 grams of sodium chloride? Hint: Think about your pathway to solving. Can you convert directly from mass to formula units or is there an intermediate unit you should use?

A) 3.88 × 10^-22
B) 2.29 × 10²⁴
C) 1.50 × 10²⁴
D) 7.27 × 10²⁵
E) 4.08 × 10²³