Radioisotopes are used to study chemical reactions because of the fact that they attach radioactive isotopes to certain atoms.<span> Tracer radioisotopes used to study chemical reactions in molecular structures by adding radioistopes to reactants and using the uptake compared to the original isotope. </span>
Answer:
There are often not more than one or two independent variables tested in an experiment.
Water is a pure substance, however it is made up of oxygen and hydrogen atoms, hence the nickname H2O (Hydrogen2, Oxygen)
