A is used to move a liquid or a gas in large volumes that would not be possible when using atmospheric pressure alone.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Why is it possible for different microorganisms to extract energy not only from carbohydrates and other biological molecules but from a large variety of substances?

How many grams of oxygen gas will react completely with a block of calcium metal that is 3.0 cm by 3.5 cm by 4.2 cm, if the density of calcium is 1.55 g/ml? show all steps of your calculation as well as the final answer.