Which of these is true about acids?

What is the relation between concentration of reactants and the rate of chemical reaction?

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.