A science fair project compares samples with close densities but different phase-change points. Sample A:,,Science - density 1.64 g/cm³,,Science - melting point 655.4°C,,Science - solubility (25°C) 35 g/100 mL,,Science - conductivity (solid): does not conduct electricity,,Science - conductivity (molten): conducts electricity,,Science - conductivity (aqueous): solution conducts strongly,,Science Sample B:,,Science - density 2.74 g/cm³,,Science - melting point 535.4°C,,Science - solubility (25°C) 10 g/100 mL,,Science - conductivity (solid): does not conduct electricity,,Science - conductivity (molten): does not conduct electricity,,Science - conductivity (aqueous): solution does not conduct,,Science "Which conclusion is best supported?,A. Sample B is likely a different (molecular) substance because it does not conduct when molten or in solution and its other properties differ. | B. They must be different because both do not conduct as solids. | C. They must be the same because both are solids at room temperature. | D. They must be the same because solubility was measured in water.,A,If a sample does not conduct as a solid