a student conducts an experience in which she drops objects ,each with a different mass, all from the same height. she uses a stopwatch and records the time it takes for each object to hit the ground. which of the following is the independent (test) variable in her experiment?

oxidation

explanation:

answer

just go with your heart buddy

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.