What chemical change occurs when a more reactive substance replaces a less reactive substance in a compound?
a. oxidative
c. reduction
b. displacement
d. endothermic

Why doesn't heat added to water make the tempature rise above 100c

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull