Hi there,
Here is a 2 step way to "Convert grams to moles"
Step 1: Find the Molecular Weight. We already know the number of grams, so unless it is already given, we need to find the molecular weight of the chemical substance.
Step 2: Divide the Amount of the Compound in Grams by the Molecular Weight. We can now convert 100g of NaOH to moles.
Hope this helps.