## Chemistry: Molecular Approach (4th Edition)

$$K_c = 9.87 \times 10^{-2}$$
1. The exponent of each concentration is equal to its balance coefficient. $$K_C = \frac{[Products]}{[Reactants]} = {[ NH_3 ][ H_2S ]}$$ Solid compounds do not appear in the expression. 2. Substitute the values and calculate the constant value: $$K_C = ( 0.278 )( 0.355 ) = 9.87 \times 10^{-2}$$