When the equation H2S + O2 --> H2O + SO2 is completely balanced using smallest whole numbers, the sum of all

Question

When the equation H2S + O2 --> H2O + SO2 is completely balanced using smallest whole numbers, the sum of all the coefficients is?
A)11
B)7
C)5
D)9

Answer 1

The balanced equation is 2H2S + 3O2 --> 2H2O + 2SO2, so the coefficients are 2, 3, 2, and 2, which sum to D) 9.