The number of moles of hydrogen that is needed to produce 0.253 mol of water is a) smaller than 0.253 mol. b) much greater than 0.253 mol. c) slightly greater than 0.253 mol. d) equal to 0.253 mol.

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.