What is the charge on an electron? -1 0 +1 -2

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

The fact that the total amount of energy in a system remains constant is a(n)

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