Matter can undergo chemical reactions and nuclear reactions. Which statement is true for both types of reactions?
O A. Mass becomes energy.
B. Mass is conserved.
C. Neutrons are released.
D. Particles of matter are reorganized.

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?