Question

For a hypothetical reaction
$4A+5B\leftrightharpoons 4P+6Q,$
The equilibrium constant $K_c$ has units

• A. $mol{L}^{-1}$
• B. $mo{l}^{-1}L$
• C. $(mol{L}^{-1}{)}^{-2}$
• D. unit less
  

Answer 1

The correct option is A $mol{L}^{-1}$

$K_c=\left[P{]}^4\right[Q{]}^6/\left(\right[A{]}^4\left[B{]}^5\right)=\left(mol{L}^{-1}{)}^{10}/\right(mol{L}^{-1}{)}^9/=mol{L}^{-1}$