There are islands in the ocean that grow larger the hawaiian islands are good examples of this the reason that the islands were formed and are still growing
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Can someone me with questions 15 to 17 plz.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

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