What is the percent of iron and oxygen in iron(III) oxide?

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?

Geothermal energy for industrial use is available almost anywhere. a.true b.false

The same side of the moon always faces earth because the