Answer the following question given this paragraph: There are several different ways to quantitatively describe the concentration of a solution. For example, molarity was introduced in as a useful way to describe solution concentrations for reactions that are carried out in solution. Mole fractions, introduced in , are used not only to describe gas concentrations but also to determine the vapor pressures of mixtures of similar liquids. Example 4 reviews the methods for calculating the molarity and mole fraction of a solution when the masses of its components are known. Q: What is used to describe gas concentrations of a solution? Choices: - fixation fractions - mesh fractions - atom fractions - mole fractions A:
mole fractions

Answer the following question given this paragraph: Parasitism is a symbiotic relationship in which the parasitic species benefits while the host species is harmed. Q: What do you call the symbiotic relationship where a parasite benefits while the host is harmed? Choices: - hostism - symbolic damage - invasion - parasitism A:
parasitism

Answer the following question given this paragraph: The cerebrum is divided into a right and left half ( Figure above ). Each half of the cerebrum is called a hemisphere. The two hemispheres are connected by a thick bundle of axons called the corpus callosum . It lies deep inside the brain and carries messages back and forth between the two hemispheres. Q: What is each half of the cerebrum called? Choices: - demisphere - a describe - a biplane - a hemisphere A:
a hemisphere

Answer the following question given this paragraph: Only radioactive isotopes have half-lives. Q: The first law of thermodynamics deals with the total amount of energy in what? Choices: - organism - springs - galaxy - universe A:
universe