Which best represents a balanced equation? A. HgO → Hg + O2
B. 2Fe + O2 → Fe2O3
C. 2H2 + 02->2H2O

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

What are transitions between a liquid and a solid called? identify which way they are transitioning

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.