What is the best definition of chemistry? A. The study of mass, energy, and light
B. The study of life and energy
C. The study of experiments and theories
D. The study of matter, its properties, and its reactions

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

How is the atomic number of a nucleus changed by alpha decay

What is the average rate of the reaction between 10 and 20 s?