Plzzz help hahsbhd db question 5

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.