. In chemistry class you were given a lab that asked you to find out what is the Percent composition of Ca in 25g of CaCl,2?​​

Molarity is moles of solute over liters of solution. idk if that is what you are talking about, but you can convert moles of solute to grams of solute using dimensional analyzes by using molar mass found on the periodic table.

Answer( precipitate );

It's potassium i believe

The percentage of the rock record is 66%plz mark me brainliest! hope this !