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How many molecules are contained in 55.0 g of H2SO4?
A 0.561 molecule
® 3.93 molecules
© 3.38 x 1023 molecules
0 2.37 x 1024 molecules

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