If there are 40 mol of nbr3 and 48 mol of naoh , what is the excess reactant ?

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?