What is the name of these 4 compound in isomers​

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?

Use the half-reactions of the reaction au(oh)3 + hi -> au +i2 +h2o to answer the questions

Why are enzymes important to cells? they bring about chemical reactions. they provide structural support. they form the two layers of membranes. they store large quantities of energy.