Adding a catalyst to a reaction has an effect similar to a. decreasing pressure. b. increasing concentration. c. lowering the concentration. d. adding water to a reaction.

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?