A variable is something that can never be changed in an experiment.
False
True

One mole of zinc has a mass of 65.4 grams. approximately how many atoms of zinc are present in one mole of zinc? 32 × 1023 atoms 6 × 1023 atoms 66 atoms 65 atoms

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

What are the major types of a chemical compound