Pls help it’s hard like rlly hard

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?

How many atoms are there in 5.70 mol of mg

Based on its chemical properties, identify the position of each chemical family on the periodic table.