75.2 grams of iron metal reacts with sulfur to produce iron (III) sulfide. a. How many moles of sulfur are used up in the reaction?

b. How many grams of iron (III) sulfide are produced?

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