Maria needs to dilute a stock solution of 16 M hydrochloric acid for an experiment. If she starts with 5 mL of 16 M HCl, what volume does she need to dilute this to with water to make a 1 M HCl solution?

Non renewable resources like petroleum eventually

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?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.