Where does the solid material go when the solution is made

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?

What is the percentage of hydrogen in nitrogen trihydride

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa