Who is the density of on object with o moss of t20g on a volume of 7mL?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Salt in oceans comes from and of rocks