Describe three different measures that can be obtained from a single age distribution graph comparing males and females of a given population.

they are known to reach a speed of 21 miles per hour

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.