How many grams of Na2O are produced when 57.5g of Na reacts?

Given:

57.5 grams of Na (Sodium) to form Na2O

First, set-up a balanced chemical equation:

Na + NaOH = > Na2O + 1/2H2

To determine the number of grams Na2O produced with the given amount of sodium:

57.5 grams Na / 23g/mol Na * (1 mol Na2O / 1 mol Na) * 62 g/mol Na2O

= 155 grams of Na2O