Achemistry student decides to rain sample materials from least to most dense she uses a graduated cylinder to measure the volume of the sample through water displacement and she uses an electronic scale to measure the mass of each sample use the data table below the samples from the lowest to highest density

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

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.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.