Open the Balancing Chemical Equations interactive and select Introduction mode. Then choose Separate Water. Adjust the coefficients until the equation is balanced.
What is the balanced chemical equation for the decomposition of water?
Open the Balancing Chemical Equations interactive and select Introduction mode. Then choose Make Ammonia. Adjust the coefficients until the equation is balanced.
What is the balanced chemical equation for the formation of ammonia?

Explanation:

1. Water decomposition

       The general equation: AB → A + B.

Hence, balancing the equation we need to add a coefficient of 2 in front of on right-hand-side of the equation and  2 in front of on left-hand-side of the equation.

     ∴The balanced equation is -

        →

2. Formation of ammonia

      →

Hence, for balancing equation we need to add a coefficient of 3 in front of hydrogen and 2 in front of ammonia.

   ∴The balanced chemical equation for the formation of ammonia gas is as  follows -

     → .

the answers would be

the first one and the second one