Suggest two diffreernces between the movement of molecules

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 characteristics can be used to differentiate star systems? check all that apply.

What is the percentage of hydrogen in nitrogen trihydride