O3 is an example of a

molecule

compound

element

mixture

Why is nh3 classified as a polar molecule

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.

Which of the following units is not an official si unit? mole liter kilogram ampere