Given the balanced equation representing a reaction:

Fe2O3 + 2Al Al2O3 + 2Fe

During this reaction, the oxidation number of Al changes from

A) +3 to 0 as electrons are transferred

B) +3 to 0 as protons are transferred

C) 0 to +3 as electrons are transferred

D) 0 to +3 as protons are transferred

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j