The correct formula for sodium sulfate is Na2SO4.
Sodium sulfate is an inorganic compound made up of sodium (Na), sulfur (S), and oxygen (O). In its formula, each sodium ion has a charge of +1, while the sulfate ion (SO42-) has a charge of -2. To balance the charges in the compound, two sodium ions are needed to combine with one sulfate ion, resulting in the overall neutral compound Na2SO4. This compound is commonly used in various industries, including glass manufacturing and as a drying agent.