Chemistry II questions - 10 pts

For the first question the answer is B, because if you reverse a reaction you have to invert the equilibrium constant. For the second question, if the reactions have different activation energies they won't start at the same time, but since we're told that at room temperature both reactions have the same rate we can ume for the reaction with the lower activation energy the temperature increased the fraction of molecules with enough energy to surmount the activation barrier (while having little to no effect on the molecules in the other reaction), which allows both reactions to continue at the same rate (C).