a u. s. quarter (5.670 g) contains 91.67% cu and a u. s. dollar coin (8.100 g) contains 88.5% cu. which coin contains the greater mass of cu and how much copper is in that coin?

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.