23) Equimolar amounts of H₂ and Cl₂ are placed in an evacuated reaction vessel at 500 K. Which of the following statements correctly predicts how the pressure will be affected as the reaction proceeds at a constant temperature and explain why?A) The pressure will remain constant because the number of gas particles is constant.B) The pressure will be halved because one substance is produced from two substances.C) The pressure will increase because the coefficient of HCl in the balanced chemical equation is greater than that of the reactants.D) The pressure will decrease because the average speed of the gaseous product molecules is less than the average speed of the gaseous reactant molecules.

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