How can a chemical reaction be sped up? Select from the drop-down menu to correctly complete the statement.
Add a that is unaffected by a reaction.
A: Catalyst
B: Coefficient
C: Product

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures

What is the measured amount of a product obtained from a chemical reaction?