A pure salt contains an unknown metal cation (M) and the sulfate anion, where M belongs to either group IA or IIA. 1.42 g of this salt was dissolved in water and treated with an excess of aqueous calcium chloride resulting in the formation of a precipitate. The precipitate was collected, dried and found to weigh 1.36 g. Determine the atomic mass of M and identify M.

Alarge marble is dropped in a graduated cylinder with 35ml of water in it. the water level increases to 49ml. what is the volume of the marble

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous