45. Free response (5pts/ each). Please show your steps. [you have to work out] Using the data table above, write an equation to solve for the average atomic mass.

Isotope Atomic Mass Percent Natural Abundance (%)

B-10. 10.01. 80.1%

B-11. 11.00. 19.9%

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