So someone deleted my question but im going to post it again if you know what YHLQMDLG mean we friends lol

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

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?

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2