J.R. S. answered 06/22/17
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You don't find how many moles are in 1 gram, but rather you find how many grams are in 1 mole.
Na = 23
Cl = 34.5
Total = 57.5 g in 1 mole NaCl
3 moles NaCl x 57.5 g/mole = 172.5 grams in 3 moles