No, sodium hydroxide is NaOH. It is a strong base made of sodium, hydrogen and oxygen. Sodium carbonates is Na2CO3. It is a weak base and is composed of sodium, carbon, and oxygen.
sodium carbonate is Na2CO3 Na has an atomic mass of 23, C is 12, and O is 16. That gives it a total Mass of 106, 46 of that being Na. That makes it 43.4% Sodium.