Methane, propane and hydrogen has equal number of molecules but different number of atoms although all three gases have different sizes of molecules. justify.

Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.

How many grams of sodium chloride are in 250ml of a 2.5m naci solution

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?