You are given 6.3 grams of magnesium to react with excess oxygen in a synthesis reaction. 2Mg+O2 > 2MgO(balanced equation) How many grams of magnesium oxide are produced?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

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.

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