Smoking and lung cancer is it a correlation or causal

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.