The mass of a 125 cm3 piece of material is 82.75 g. determine the density of this material . explain

Name the element in group 17, period 2. (periodic table)

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius

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