Balance the following chemical equation by providing the correct
coefficients.
[? ]FeBr3 + []Na2S → Fe2S3 + NaBr

2FeBr₃   +    3Na₂S  →   Fe₂S₃  +  6NaBr

Explanation:

The expression to be balanced is given as:

        FeBr₃   +    Na₂S  →   Fe₂S₃  +  NaBr

To balanced this chemical equation, we can use a simple mathematical approach.

Simply use the alphabets a, b, c and d to represent the numbers that will make the equation balanced;

        aFeBr₃   +    bNa₂S  →   cFe₂S₃  +  dNaBr

Conserving Fe;

                   a  = 2c

Conserving Br;

                    3a  = d

Conserving Na;

                    2b = d

Conserving S;

                    b = 3c

Let a  = 1,      b  =

      c  =      d = 3

 Multiply through by 2 to get whole number ratios;

        a  = 2, b  = 3 , c = 1 and d = 6

          2FeBr₃   +    3Na₂S  →   Fe₂S₃  +  6NaBr

i think tornado but not 100%