(Please Help) when adding a coefficient to a molecule what must you do to all atoms of that molecule?

A. Only multiple the first atom of the coefficient

B. multiply all of the atoms by the coefficient

C. Add the coefficient and the subscripts together, then divide them all by 2.​

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.

Which term defines a type of oxygen that forms a protective layer miles above the earth a. fossil fuel b. smog c. pollution d. ozone