What kind of metal is Calcium, and where is it found?

What must occur for air masses to form fronts

Ab c or d ? i’m not sure what the answer is

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.