Initially, only A and B are present, each at 2.00m . What is the final concentration of A once equilibrium is reached? Express the molar concentration numerically using two significant figures THE EQUILIBRIUM CONSTANT= 2.1 The reversible chemical reaction A+B=C+D part b: What is the final concentration of D at equilibrium if the initial concentrations are[A] = 1.00 m and [B] = 2.00 ? Express the molar concentration numerically using two significant figures.