The sensitivity of a spectrophotometer allows detection of 1 percent of one colored form of an indicator (for example HIn) in the presence of 99 percent of the other colored form (In- ). Based on this fact, over what pH range relative to its pK can an indicator be used if a spectrophotometer is employed

1. list three scientific reasons cockroaches may fly.

Which of these is a physical property

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.