What's the molar mass of alumina, Al2O3? The atomic weight of aluminum is 26.98 and the atomic weight of oxygen is 16.00.
A) 101.96 g/mol
B) 149.96 g/mol
C) 42.98 g/mol
D) 48.00 g/mol

Two atoms interact with each other as shown by the equation. complete the equation by filling in the missing parts. 1 2 3 4 5 h he li

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.

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?