Difference between compound and mixture the chemical properties of a compound are different from the chemical properties of a mixture because: a. the substances in a compound are chemically joined in a fixed proportion b. the substances in a compound are always composed of at least three different types of atoms c. mixtures are always homogeneous d. the properties of a mixture are different from those of the substances from which it is made

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt