To balance the chemical equation Na₂S + t S → Na, you need to first balance the sulfur atoms, and then balance the sodium atoms.
In order to balance the chemical equation Na₂S + t S → Na, you need to make sure that the number of atoms of each element is the same on both sides of the equation. Here's how to balance it:
Start by balancing the sulfur (S) atoms. In the reactant side, there are two sulfur atoms, so you need to put a coefficient of 2 in front of Na₂S to have 2 sulfur atoms on the product side.
The equation now looks like this: 2Na₂S + t S → Na
Next, balance the sodium (Na) atoms. In the reactant side, there are 4 sodium atoms (2 from each Na₂S), so you need to put a coefficient of 4 in front of Na on the product side.
The final balanced equation is: 2Na₂S + t S → 4Na