What is the oxidation half-reaction for 2Mg + O2 -> 2MgO a. Mg2+ +2e- -> Mg
B. Mg-> Mg 2+ +2e-
c. O2 + 4e- -> 20 2-
d. 20 2- -> O2 + 4E-

Calculate the change in entropy if br2(l) is converted to br2(g). s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Which statement are accurate about snow flakes