Give one use of zinc​

Identify a specific example for each type of technology

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?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure