An atomic mass unit is equal to a. one-half the mass of a hydrogen atom. b. one-fourth the mass of a lithium atom. c. one-twelfth the mass of a carbon-12 atom. d. one-fifteenth the mass of a nitrogen-15 atom.

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist