Which type of graph is best suited to show the breakdown of how this teacher weighs each category?

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 metal exist in liquid state and can be cut with knife ?

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