Can someone help me on this question please I really need help

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?

Which three statements represent the benefits of performing experiments using computer simulations?

What is formed when amino acids form long chains or polymerize