Janet learned in science class that the amount of salt that can dissolve in a certain amount of water depends on the temperature of the water. she decides to do an experiment to test this. she carefully adds salt, 100 mg at a time, to a cup of water and stirs until all the salt dissolves. when she has added so much salt that it will not dissolve after 5 minutes, she measures the temperature of the water. she records the temperature and the final amount of salt. she does this with cold water, cool water, room-temperature water, warm water, and hot water. what is the test variable (independent variable) in this experiment?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Listenbase your answer to the question on the information below.nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body.cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment.which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.