What would be a good acid-base pair from which to prepare a buffer solution whose pH is 10.3?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Which is true of a liquid? it has a definite volume but not a definite mass.it has a definite mass but not a definite volume.it has a definite volume but not a definite shape.it has a definite shape but not a definite volume.

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology