During the course of a chemical reaction, a student monitors the mass of Zn over time. At the 10 second mark, the mass of Zn is 0.51g, and at the 25 second mark, the mass of Zn is 0.48g. What is the rate of consumption of Zn over this time interval?

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