How many molecules are in 32.4 grams of phosphorous pentoxide?

Easy definition for atom and atomic mass

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

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?