Agas cylinder contains exactly 15 moles of oxygen gas (O2). How many molecules of oxygen
are in the cylinder?

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

Why is the melting of ice a physical change ?