Question

Is it balanced or unbalanced. Use the picture

Answer 1

• 
  `N_2 + H_2 -- > 2NH_3`:
  This equation is balanced. There are 2 nitrogen atoms and 2 hydrogen atoms on both sides of the equation.

• 
  `2C_2H_6 + 7O_2 -- > 4CO_2 + 6H_2O`: This equation is balanced. There are 4 carbon atoms, 14 hydrogen atoms, and 14 oxygen atoms on both sides of the equation.

• 
  `4ZnS + 6O_2 -- > 4ZnO + 4SO_2`: This equation is balanced. There are 4 zinc atoms, 4 sulfur atoms, and 12 oxygen atoms on both sides of the equation.

• 
  `2Fe_2O_3 + 3C -- > Fe + 3CO_2`: This equation is unbalanced. The number of atoms of Fe on the righ side does not balance that on the left side.

• 
  `C_3H_8 + 5O_2 --- > 3CO_2 + 4H_2O`: The equation is balanced. The number of atoms of C, H, and O on the right side equals the numbers on the left side