The Meker burner must be used carefully. The flame is visible but can be lost against the background. Use extreme caution when reaching for objects behind or around the flame. Make sure that long hair is tied back while the burner is on. Define the Law of definite proportions as written in your book.
Air contains nitrogen gas and oxygen gas.
Write out these molecules and draw their Lewis structures. The apparatus that you will be using in this lab should be set up for you on the desktop. Make sure that the Meker burner is the correct distance below the iron ring. At the correct distance the tip of the blue flame should be just below the bottom of the ceramic crucible. Clean your ceramic crucible, removing all the excess material from the inside.