1. Which of the following is true regarding a Dynamic Equilibrium? a) it may occur in both open and closed systems b) the forward reaction is only occurring c) the concentrations found at equilibrium are different if a system approaches equilibrium from different directions d) the concentration of reactants and products remains constant 2. The type of dynamic equilibrium between different physical states of a pure substance in a closed system is called: a) Solubility Equilibrium b) Phase Equilibrium c) Chemical Equilibrium d) Homogeneous Equilibrium

D) the concentration of reactants and products remains constant.

Explanation:

1. Which of the following is true regarding a Dynamic Equilibrium?

A) it may occur in both open and closed systems. FALSE. It can only occur in closed systems. Otherwise, gases would leave the recipient and it would be impossible to reach the equilibrium.

B) the forward reaction is only occurring. FALSE. The forward reaction and the reverse reaction occur at the same rate.

C) the concentrations found at equilibrium are different if a system approaches equilibrium from different directions. FALSE. The equilibrium is the same regardless of the direction from which it comes.

D) the concentration of reactants and products remains constant. TRUE.

the formula would be mgso4

mgso[subscript]4

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)