Who proposed Law of Conservation of Mass?

Which of the following is not a law of chemical combination?

Which of the following statement is correct?

What does the Elixir of life of do?

______ formula can be calculated if the molar mass is known after having an empirical formula.

Water is a/an ___

A solution contains 8 moles of solute and the mass of the solution is 4 kg. What’s the molality of this solution?

Convert 40°C to °F.