Which of the following as a chemical formula of Glauber’s salt?

NaO4.10H2O NaSO4.1H2O NaSO4.10H2O NaSO.10H2O

NaSO4.10H2O

The correct answer is option 3. NaSO4.10H2O. Two atoms of sodium, one atom of sulfur, four atoms of oxygen, and ten moles of water make up Glauber's salt. It is the sodium sulfate, and its chemical formula is NaSO4.10H2O. It is water soluble.